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class="vector-toc-numb">2</span> <span>Endogenous activation</span> </div> </a> <ul id="toc-Endogenous_activation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Role_in_disease" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Role_in_disease"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Role in disease</span> </div> </a> <ul id="toc-Role_in_disease-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Agonists" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Agonists"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Agonists</span> </div> </a> <ul id="toc-Agonists-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Antagonists" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Antagonists"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Antagonists</span> </div> </a> <ul id="toc-Antagonists-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> 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class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Gene found in humans and other animals</div> <table class="infobox" style="width:26.4em"><tbody><tr><th colspan="4" style="text-align:center;font-size:125%;font-weight:bold">SMO</th></tr><tr><td colspan="4" style="text-align:center"></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd">Available structures</th></tr><tr><th rowspan="2" style="background-color:#c3fdb8;width:43px"><a href="/wiki/Protein_Data_Bank" title="Protein Data Bank">PDB</a></th><td colspan="2" style="background-color:#eee">Ortholog search: <span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/pdbe/searchResults.html?display=both&term=P56726%20or%20Q99835">PDBe</a> <a rel="nofollow" class="external text" href="https://www.rcsb.org/search?q=rcsb_polymer_entity_container_identifiers.reference_sequence_identifiers.database_name:UniProt%20AND%20rcsb_polymer_entity_container_identifiers.reference_sequence_identifiers.database_accession:P56726,Q99835">RCSB</a> </span></td></tr><tr><td><table class="collapsible collapsed" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr style="background-color:#ddd;text-align:center"><th colspan="2">List of PDB id codes</th></tr><tr><td colspan="2" style="background-color:#eee"><p><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/4JKV">4JKV</a>, <a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/4N4W">4N4W</a>, <a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/4O9R">4O9R</a>, <a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/4QIM">4QIM</a>, <a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/4QIN">4QIN</a>, <a rel="nofollow" class="external text" href="https://www.rcsb.org/structure/5L7I">5L7I</a></span></p></td></tr></tbody></table></td></tr></tbody></table></td></tr><tr><th colspan="4" style="text-align:center;background-color:#ddd">Identifiers</th></tr><tr><th scope="row" style="background-color:#c3fdb8"><span class="plainlinks"><a href="/wiki/Gene_nomenclature" title="Gene nomenclature">Aliases</a></span></th><td colspan="3" style="background:#eee"><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/11119">SMO</a></span>, FZD11, Gx, SMOH, smoothened, frizzled class receptor, CRJS, PHLS</td></tr><tr><th scope="row" style="background-color:#c3fdb8">External IDs</th><td colspan="3" style="background-color:#eee"><span class="plainlinks"><a href="/wiki/Mendelian_Inheritance_in_Man" class="mw-redirect" title="Mendelian Inheritance in Man">OMIM</a>: <a rel="nofollow" class="external text" href="https://omim.org/entry/601500">601500</a>; <a href="/wiki/Mouse_Genome_Informatics" title="Mouse Genome Informatics">MGI</a>: <a rel="nofollow" class="external text" href="http://www.informatics.jax.org/marker/MGI:108075">108075</a>; <a href="/wiki/HomoloGene" title="HomoloGene">HomoloGene</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=homologene&dopt=HomoloGene&list_uids=4115">4115</a>; <a href="/wiki/GeneCards" title="GeneCards">GeneCards</a>: <a rel="nofollow" class="external text" href="https://www.genecards.org/cgi-bin/carddisp.pl?gene=SMO">SMO</a>; <a href="/wiki/Orthologous_MAtrix" title="Orthologous MAtrix">OMA</a>:<a rel="nofollow" class="external text" href="https://omabrowser.org/oma/vps/ENSG00000128602">SMO - orthologs</a></span></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table class="collapsible collapsed" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd">Gene location (<a href="/wiki/Human_genome" title="Human genome">Human</a>)</th></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><span typeof="mw:File"><a href="/wiki/File:Ideogram_human_chromosome_7.svg" class="mw-file-description" title="Chromosome 7 (human)"><img alt="Chromosome 7 (human)" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Ideogram_human_chromosome_7.svg/300px-Ideogram_human_chromosome_7.svg.png" decoding="async" width="300" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Ideogram_human_chromosome_7.svg/450px-Ideogram_human_chromosome_7.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Ideogram_human_chromosome_7.svg/600px-Ideogram_human_chromosome_7.svg.png 2x" data-file-width="474" data-file-height="189" /></a></span></td></tr><tr><th scope="row" width="15%" style="background-color:#c3fdb8"><a href="/wiki/Chromosome" title="Chromosome">Chr.</a></th><td colspan="3" width="85%" style="background-color:#eee"><span class="plainlinks"><a href="/wiki/Chromosome_7_(human)" class="mw-redirect" title="Chromosome 7 (human)">Chromosome 7 (human)</a><sup id="cite_ref-refGRCh38Ensembl_1-0" class="reference"><a href="#cite_note-refGRCh38Ensembl-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><div align="center"><div style="position: relative; width: 300px;"><span typeof="mw:File"><a href="/wiki/File:Human_chromosome_7_ideogram.svg" class="mw-file-description" title="Chromosome 7 (human)"><img alt="Chromosome 7 (human)" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Human_chromosome_7_ideogram.svg/300px-Human_chromosome_7_ideogram.svg.png" decoding="async" width="300" height="58" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Human_chromosome_7_ideogram.svg/450px-Human_chromosome_7_ideogram.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Human_chromosome_7_ideogram.svg/600px-Human_chromosome_7_ideogram.svg.png 2x" data-file-width="1125" data-file-height="216" /></a></span><div style="position: absolute; left: 233.0894267209px; top: 2px; padding: 0;"><span typeof="mw:File"><a href="/wiki/File:HSR_1996_II_3.5e.svg" class="mw-file-description" title="Genomic location for SMO"><img alt="Genomic location for SMO" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/14px-HSR_1996_II_3.5e.svg.png" decoding="async" width="14" height="14" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/21px-HSR_1996_II_3.5e.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/28px-HSR_1996_II_3.5e.svg.png 2x" data-file-width="142" data-file-height="142" /></a></span></div><div style="position: absolute; left: 239.1px; top: 19px; padding: 0;"><span typeof="mw:File"><a href="/wiki/File:Red_rectangle_2x18.png" class="mw-file-description" title="Genomic location for SMO"><img alt="Genomic location for SMO" src="//upload.wikimedia.org/wikipedia/commons/6/6a/Red_rectangle_2x18.png" decoding="async" width="2" height="18" class="mw-file-element" data-file-width="2" data-file-height="18" /></a></span></div></div></div></td></tr><tr><th scope="row" rowspan="2" width="15%" style="background-color:#c3fdb8"><a href="/wiki/Locus_(genetics)" title="Locus (genetics)">Band</a></th><td rowspan="2" width="35%" style="background-color:#eee"><span class="plainlinks">7q32.1</span></td><th scope="row" style="background-color:#c3fdb8">Start</th><td style="background-color:#eee"><span class="plainlinks">129,188,633 <a href="/wiki/Base_pair" title="Base pair">bp</a><sup id="cite_ref-refGRCh38Ensembl_1-1" class="reference"><a href="#cite_note-refGRCh38Ensembl-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span></td></tr><tr><th scope="row" style="background-color:#c3fdb8">End</th><td style="background-color:#eee"><span class="plainlinks">129,213,545 <a href="/wiki/Base_pair" title="Base pair">bp</a><sup id="cite_ref-refGRCh38Ensembl_1-2" class="reference"><a href="#cite_note-refGRCh38Ensembl-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table class="collapsible collapsed" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd">Gene location (<a href="/wiki/Laboratory_mouse" title="Laboratory mouse">Mouse</a>)</th></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><span typeof="mw:File"><a href="/wiki/File:Ideogram_house_mouse_chromosome_6.svg" class="mw-file-description" title="Chromosome 6 (mouse)"><img alt="Chromosome 6 (mouse)" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Ideogram_house_mouse_chromosome_6.svg/260px-Ideogram_house_mouse_chromosome_6.svg.png" decoding="async" width="260" height="111" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Ideogram_house_mouse_chromosome_6.svg/390px-Ideogram_house_mouse_chromosome_6.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Ideogram_house_mouse_chromosome_6.svg/520px-Ideogram_house_mouse_chromosome_6.svg.png 2x" data-file-width="470" data-file-height="200" /></a></span></td></tr><tr><th scope="row" width="15%" style="background-color:#c3fdb8"><a href="/wiki/Chromosome" title="Chromosome">Chr.</a></th><td colspan="3" width="85%" style="background-color:#eee"><span class="plainlinks">Chromosome 6 (mouse)<sup id="cite_ref-refGRCm38Ensembl_2-0" class="reference"><a href="#cite_note-refGRCm38Ensembl-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></span></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><div align="center"><div style="position: relative; width: 300px;"><span typeof="mw:File"><a href="/wiki/File:Ideogram_of_house_mouse_chromosome_6.svg" class="mw-file-description" title="Chromosome 6 (mouse)"><img alt="Chromosome 6 (mouse)" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Ideogram_of_house_mouse_chromosome_6.svg/300px-Ideogram_of_house_mouse_chromosome_6.svg.png" decoding="async" width="300" height="58" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Ideogram_of_house_mouse_chromosome_6.svg/450px-Ideogram_of_house_mouse_chromosome_6.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Ideogram_of_house_mouse_chromosome_6.svg/600px-Ideogram_of_house_mouse_chromosome_6.svg.png 2x" data-file-width="1200" data-file-height="231" /></a></span><div style="position: absolute; left: 53.035979906172px; top: 2px; padding: 0;"><span typeof="mw:File"><a href="/wiki/File:HSR_1996_II_3.5e.svg" class="mw-file-description" title="Genomic location for SMO"><img alt="Genomic location for SMO" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/14px-HSR_1996_II_3.5e.svg.png" decoding="async" width="14" height="14" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/21px-HSR_1996_II_3.5e.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d8/HSR_1996_II_3.5e.svg/28px-HSR_1996_II_3.5e.svg.png 2x" data-file-width="142" data-file-height="142" /></a></span></div><div style="position: absolute; left: 59px; top: 19px; padding: 0;"><span typeof="mw:File"><a href="/wiki/File:Red_rectangle_2x18.png" class="mw-file-description" title="Genomic location for SMO"><img alt="Genomic location for SMO" src="//upload.wikimedia.org/wikipedia/commons/6/6a/Red_rectangle_2x18.png" decoding="async" width="2" height="18" class="mw-file-element" data-file-width="2" data-file-height="18" /></a></span></div></div></div></td></tr><tr><th scope="row" rowspan="2" width="15%" style="background-color:#c3fdb8"><a href="/wiki/Locus_(genetics)" title="Locus (genetics)">Band</a></th><td rowspan="2" width="35%" style="background-color:#eee"><span class="plainlinks">6 A3.3|6 12.36 cM</span></td><th scope="row" style="background-color:#c3fdb8">Start</th><td style="background-color:#eee"><span class="plainlinks">29,735,502 <a href="/wiki/Base_pair" title="Base pair">bp</a><sup id="cite_ref-refGRCm38Ensembl_2-1" class="reference"><a href="#cite_note-refGRCm38Ensembl-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></span></td></tr><tr><th scope="row" style="background-color:#c3fdb8">End</th><td style="background-color:#eee"><span class="plainlinks">29,761,364 <a href="/wiki/Base_pair" title="Base pair">bp</a><sup id="cite_ref-refGRCm38Ensembl_2-2" class="reference"><a href="#cite_note-refGRCm38Ensembl-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></span></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table class="collapsible collapsed" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd"><a href="/wiki/Gene_expression" title="Gene expression">RNA expression</a> pattern</th></tr><tr><th scope="row" style="background-color:#c3fdb8"><a rel="nofollow" class="external text" href="https://www.bgee.org/">Bgee</a></th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th><b><a href="/wiki/Human_genome" title="Human genome">Human</a></b></th><th><b><a href="/wiki/Laboratory_mouse" title="Laboratory mouse">Mouse</a> (ortholog)</b></th></tr><tr><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:center"><tbody><tr><td colspan="1"><span class="plainlinks" style="margin:-3px"><a rel="nofollow" class="external text" href="https://www.bgee.org/gene/ENSG00000128602">Top expressed in</a></span></td></tr><tr><td colspan="1"><div class="plainlinks" style="margin:-12px 0px -10px 0px"><ul style="line-height:15%;margin:9px"><li style="line-height: 137%;">ventricular zone</li><br /><li style="line-height: 137%;">left ovary</li><br /><li style="line-height: 137%;">right ovary</li><br /><li style="line-height: 137%;">ganglionic eminence</li><br /><li style="line-height: 137%;">canal of the cervix</li><br /><li style="line-height: 137%;">pancreatic ductal cell</li><br /><li style="line-height: 137%;">ectocervix</li><br /><li style="line-height: 137%;">body of uterus</li><br /><li style="line-height: 137%;">anterior pituitary</li><br /><li style="line-height: 137%;">right lobe of liver</li></ul></div></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:center"><tbody><tr><td colspan="1"><span class="plainlinks" style="margin:-3px"><a rel="nofollow" class="external text" href="https://www.bgee.org/gene/ENSMUSG00000001761">Top expressed in</a></span></td></tr><tr><td colspan="1"><div class="plainlinks" style="margin:-12px 0px -10px 0px"><ul style="line-height:15%;margin:9px"><li style="line-height: 137%;">genital tubercle</li><br /><li style="line-height: 137%;">ventricular zone</li><br /><li style="line-height: 137%;">tail of embryo</li><br /><li style="line-height: 137%;">lip</li><br /><li style="line-height: 137%;">right kidney</li><br /><li style="line-height: 137%;">esophagus</li><br /><li style="line-height: 137%;">embryo</li><br /><li style="line-height: 137%;">embryo</li><br /><li style="line-height: 137%;">yolk sac</li><br /><li style="line-height: 137%;">dentate gyrus of hippocampal formation granule cell</li></ul></div></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.bgee.org/gene/ENSG00000128602">More reference expression data</a></span></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8"><a rel="nofollow" class="external text" href="http://biogps.org/">BioGPS</a></th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><td colspan="4" style="text-align:center;background-color:#eee"><span typeof="mw:File"><a href="/wiki/File:PBB_GE_SMO_218629_at_fs.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/PBB_GE_SMO_218629_at_fs.png/250px-PBB_GE_SMO_218629_at_fs.png" decoding="async" width="250" height="181" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/PBB_GE_SMO_218629_at_fs.png/375px-PBB_GE_SMO_218629_at_fs.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/PBB_GE_SMO_218629_at_fs.png/500px-PBB_GE_SMO_218629_at_fs.png 2x" data-file-width="732" data-file-height="530" /></a></span></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><span class="plainlinks"><a rel="nofollow" class="external text" href="http://biogps.org/gene/6608/">More reference expression data</a></span></td></tr></tbody></table></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table class="collapsible collapsed" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd"><a href="/wiki/Gene_ontology" class="mw-redirect" title="Gene ontology">Gene ontology</a></th></tr><tr><td style="background-color:#c3fdb8;font-weight:bold">Molecular function</td><td style="background-color:#eee"><div class="plainlinks"> <ul><li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005113">patched binding</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005515">protein binding</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0004888">transmembrane signaling receptor activity</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/">signal transducer activity</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0004930">G protein-coupled receptor activity</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0017147">Wnt-protein binding</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0042813">Wnt-activated receptor activity</a></li></ul> </div></td></tr><tr><td style="background-color:#c3fdb8;font-weight:bold">Cellular component</td><td style="background-color:#eee"><div class="plainlinks"> <ul><li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005737">cytoplasm</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0030666">endocytic vesicle membrane</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0016020">membrane</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005901">caveola</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0042995">cell projection</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0070062">extracellular exosome</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005794">Golgi apparatus</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0043231">intracellular membrane-bounded organelle</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005886">plasma membrane</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0097542">ciliary tip</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0060170">ciliary membrane</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0005929">cilium</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0016021">integral component of membrane</a></li></ul> </div></td></tr><tr><td style="background-color:#c3fdb8;font-weight:bold">Biological process</td><td style="background-color:#eee"><div class="plainlinks"> <ul><li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007389">pattern specification process</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0061113">pancreas morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0043392">negative regulation of DNA binding</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021910">smoothened signaling pathway involved in ventral spinal cord patterning</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001570">vasculogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001947">heart looping</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0042475">odontogenesis of dentin-containing tooth</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0060413">atrial septum morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007166">cell surface receptor signaling pathway</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0002053">positive regulation of mesenchymal cell proliferation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021696">cerebellar cortex morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0040018">positive regulation of multicellular organism growth</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0031069">hair follicle morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:2000826">regulation of heart morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0003323">type B pancreatic cell development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0002052">positive regulation of neuroblast proliferation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0072001">renal system development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0090190">positive regulation of branching involved in ureteric bud morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0045880">positive regulation of smoothened signaling pathway</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001503">ossification</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048568">embryonic organ development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021542">dentate gyrus development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0060684">epithelial-mesenchymal cell signaling</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:2000036">regulation of stem cell population maintenance</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001701">in utero embryonic development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0071397">cellular response to cholesterol</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0010629">negative regulation of gene expression</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0045893">positive regulation of transcription, DNA-templated</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048853">forebrain morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0051799">negative regulation of hair follicle development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007417">central nervous system development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021953">central nervous system neuron differentiation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0042307">positive regulation of protein import into nucleus</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007224">smoothened signaling pathway</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007186">G protein-coupled receptor signaling pathway</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0035264">multicellular organism growth</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021794">thalamus development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0050679">positive regulation of epithelial cell proliferation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021938">smoothened signaling pathway involved in regulation of cerebellar granule cell precursor cell proliferation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001708">cell fate specification</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0050821">protein stabilization</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0046622">positive regulation of organ growth</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0043066">negative regulation of apoptotic process</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0000122">negative regulation of transcription by RNA polymerase II</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048589">developmental growth</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001649">osteoblast differentiation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0003140">determination of left/right asymmetry in lateral mesoderm</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021987">cerebral cortex development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0010468">regulation of gene expression</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048873">homeostasis of number of cells within a tissue</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0021904">dorsal/ventral neural tube patterning</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0045892">negative regulation of transcription, DNA-templated</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0009953">dorsal/ventral pattern formation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0051451">myoblast migration</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007228">positive regulation of hh target transcription factor activity</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007371">ventral midline determination</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048468">cell development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048143">astrocyte activation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0003007">heart morphogenesis</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0072285">mesenchymal to epithelial transition involved in metanephric renal vesicle formation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0061053">somite development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0060644">mammary gland epithelial cell differentiation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007275">multicellular organism development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0010628">positive regulation of gene expression</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007368">determination of left/right symmetry</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048741">skeletal muscle fiber development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0001755">neural crest cell migration</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0008284">positive regulation of cell population proliferation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0034504">protein localization to nucleus</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0048565">digestive tract development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0030857">negative regulation of epithelial cell differentiation</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0070986">left/right axis specification</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0009952">anterior/posterior pattern specification</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0045944">positive regulation of transcription by RNA polymerase II</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007165">signal transduction</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0007494">midgut development</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0035567">non-canonical Wnt signaling pathway</a></li> <li><a rel="nofollow" class="external text" href="http://amigo.geneontology.org/amigo/term/GO:0060070">canonical Wnt signaling pathway</a></li></ul> </div></td></tr><tr><td colspan="4" style="background-color:#eee;text-align:center">Sources:<a rel="nofollow" class="external text" href="http://amigo.geneontology.org/">Amigo</a> / <a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/QuickGO/">QuickGO</a></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table class="collapsible" style="padding:0;border:none;margin:0;width:100%;text-align:left"><tbody><tr><th colspan="4" style="text-align:center;background-color:#ddd"><a href="/wiki/Orthologs" class="mw-redirect" title="Orthologs">Orthologs</a></th></tr><tr><th scope="row" style="background-color:#c3fdb8">Species</th><td><b>Human</b></td><td><b>Mouse</b></td></tr><tr><th scope="row" style="background-color:#c3fdb8"><a href="/wiki/Entrez" title="Entrez">Entrez</a></th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene&cmd=retrieve&dopt=default&list_uids=6608&rn=1">6608</a></p></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene&cmd=retrieve&dopt=default&list_uids=319757&rn=1">319757</a></p></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8"><a href="/wiki/Ensembl" class="mw-redirect" title="Ensembl">Ensembl</a></th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="http://www.ensembl.org/Homo_sapiens/geneview?gene=ENSG00000128602;db=core">ENSG00000128602</a></p></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="http://www.ensembl.org/Mus_musculus/geneview?gene=ENSMUSG00000001761;db=core">ENSMUSG00000001761</a></p></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8"><a href="/wiki/UniProt" title="UniProt">UniProt</a></th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="https://www.uniprot.org/uniprot/Q99835">Q99835</a></p></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1"><span class="plainlinks"></span></th></tr><tr><td colspan="1"><p class="plainlinks"><a rel="nofollow" class="external text" href="https://www.uniprot.org/uniprot/P56726">P56726</a></p></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8">RefSeq (mRNA)</th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1" class="plainlinks"></th></tr><tr><td colspan="1"><p><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NM_005631">NM_005631</a></span></p></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1" class="plainlinks"></th></tr><tr><td colspan="1"><p><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NM_176996">NM_176996</a></span></p></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8">RefSeq (protein)</th><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1" class="plainlinks"></th></tr><tr><td colspan="1"><p><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NP_005622">NP_005622</a></span></p></td></tr></tbody></table></td><td><table class="none" style="padding:0;border:none;margin:0;width:100%;text-align:right"><tbody><tr><th colspan="1" class="plainlinks"></th></tr><tr><td colspan="1"><p><span class="plainlinks"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NP_795970">NP_795970</a></span></p></td></tr></tbody></table></td></tr><tr><th scope="row" style="background-color:#c3fdb8">Location (UCSC)</th><td><span class="plainlinks"><a rel="nofollow" class="external text" href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&position=chr7:129188633-129213545">Chr 7: 129.19 – 129.21 Mb</a></span></td><td><span class="plainlinks"><a rel="nofollow" class="external text" href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Mouse&db=mm0&position=chr6:29735502-29761364">Chr 6: 29.74 – 29.76 Mb</a></span></td></tr><tr><th scope="row" style="background-color:#c3fdb8"><a href="/wiki/PubMed" title="PubMed">PubMed</a> search</th><td><span class="plainlinks"><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></span></td><td><span class="plainlinks"><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></span></td></tr></tbody></table></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><a href="/wiki/Wikidata" title="Wikidata">Wikidata</a></td></tr><tr><td colspan="4" style="text-align:center;background-color:#eee"><table style="padding:0;border:none;margin:0;width:100%;text-align:center"><tbody><tr><td colspan="2" style="background-color:#eee;text-align:center"><a href="https://www.wikidata.org/wiki/Q18031607" class="extiw" title="d:Q18031607">View/Edit Human</a></td><td colspan="2" style="background-color:#eee;text-align:center"><a href="https://www.wikidata.org/wiki/Q18301609" class="extiw" title="d:Q18301609">View/Edit Mouse</a></td></tr></tbody></table></td></tr></tbody></table> <p><b>Smoothened</b> is a <a href="/wiki/Protein" title="Protein">protein</a> that in humans is encoded by the <i>SMO</i> <a href="/wiki/Gene" title="Gene">gene</a>. Smoothened is a Class <a href="/wiki/Frizzled" title="Frizzled">Frizzled</a> (Class F) <a href="/wiki/G_protein-coupled_receptor" title="G protein-coupled receptor">G protein-coupled receptor</a><sup id="cite_ref-pmid17094938_5-0" class="reference"><a href="#cite_note-pmid17094938-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> that is a component of the <a href="/wiki/Hedgehog_signaling_pathway" title="Hedgehog signaling pathway">hedgehog signaling pathway</a> and is conserved from <a href="/wiki/Drosophila" title="Drosophila">flies</a> to humans. It is the molecular target of the natural <a href="/wiki/Teratogen" class="mw-redirect" title="Teratogen">teratogen</a> <a href="/wiki/Cyclopamine" title="Cyclopamine">cyclopamine</a>.<sup id="cite_ref-pmid10984056_7-0" class="reference"><a href="#cite_note-pmid10984056-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> It also is the target of <a href="/wiki/Vismodegib" title="Vismodegib">vismodegib</a>, the first hedgehog pathway inhibitor to be approved by the U.S. <a href="/wiki/Food_and_Drug_Administration" title="Food and Drug Administration">Food and Drug Administration (FDA)</a>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Smoothened (Smo) is a key <a href="/wiki/Transmembrane_protein" title="Transmembrane protein">transmembrane protein</a> that is a key component of the <a href="/wiki/Hedgehog_signaling_pathway" title="Hedgehog signaling pathway">hedgehog signaling pathway</a>, a cell-cell communication system critical for embryonic development and adult tissue <a href="/wiki/Homeostasis" title="Homeostasis">homeostasis</a>.<sup id="cite_ref-pmid31092502_9-0" class="reference"><a href="#cite_note-pmid31092502-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid31979397_10-0" class="reference"><a href="#cite_note-pmid31979397-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Mutations in proteins that relay Hh signals between cells cause birth defects and <a href="/wiki/Cancer" title="Cancer">cancer</a>.<sup id="cite_ref-pmid32105673_11-0" class="reference"><a href="#cite_note-pmid32105673-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> The protein that carries the Hh signal across the membrane is the <a href="/wiki/Oncoprotein" class="mw-redirect" title="Oncoprotein">oncoprotein</a> and <a href="/wiki/G-protein_coupled_receptor" class="mw-redirect" title="G-protein coupled receptor">G-protein coupled receptor</a> (GPCR) Smoothened (Smo). Smo is regulated by a separate transmembrane receptor for Hh ligands called <a href="/wiki/Patched" title="Patched">Patched</a> (Ptc). Ptc itself is a <a href="/wiki/Tumor_suppressor" class="mw-redirect" title="Tumor suppressor">tumor suppressor</a> that keeps the Hh pathway off by inhibiting Smo. The excessive Hh signaling that drives human skin and brain cancer is most frequently caused by inactivating mutations in Ptc or by gain of function mutations in Smo. While direct Smo <a href="/wiki/Agonists" class="mw-redirect" title="Agonists">agonists</a> and <a href="/wiki/Receptor_antagonist" title="Receptor antagonist">antagonists</a>, such as SAG and <a href="/wiki/Vismodegib" title="Vismodegib">vismodegib</a>, can bind to and activate or inhibit Smo, how Ptc inhibits Smo endogenously remains a mystery in the field. </p><p>Currently, Smo is targeted and inhibited directly by a small-molecule drug, vismodegib, for the treatment of advanced basal cell cancer, however widespread resistance to this drug has become a prevalent issue.<sup id="cite_ref-pmid31992959_12-0" class="reference"><a href="#cite_note-pmid31992959-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid31953165_13-0" class="reference"><a href="#cite_note-pmid31953165-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Finding another method to target Smo activity in Hh-driven cancers would provide valuable information for novel therapeutics. Identifying these Ptc responsive sites on Smo will help solve a long-standing mystery in Hh signaling and suggest new therapeutic strategies to block Smo activity in Hh-driven cancers. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Function">Function</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=1" title="Edit section: Function"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Signal_transduction_pathways.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Signal_transduction_pathways.svg/220px-Signal_transduction_pathways.svg.png" decoding="async" width="220" height="162" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Signal_transduction_pathways.svg/330px-Signal_transduction_pathways.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Signal_transduction_pathways.svg/440px-Signal_transduction_pathways.svg.png 2x" data-file-width="1858" data-file-height="1364" /></a><figcaption>Overview of signal transduction pathways involved in <a href="/wiki/Apoptosis" title="Apoptosis">apoptosis</a>.</figcaption></figure> <p>Cellular localization plays an essential role in the function of SMO, which anchors to the cell membrane as a 7-pass transmembrane protein. Stimulation of the <a href="/wiki/PTCH1" title="PTCH1">patched</a> 12-pass transmembrane receptor by the <a href="/wiki/Sonic_hedgehog" class="mw-redirect" title="Sonic hedgehog">sonic hedgehog</a> ligand leads to translocation of SMO to the <a href="/wiki/Primary_cilium" class="mw-redirect" title="Primary cilium">primary cilium</a> in vertebrates in a process that involves the exit of patched from the primary cilium, where it normally localizes in its unstimulated state.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Vertebrate SMO that is mutated in the domain required for ciliary localisation often cannot contribute to hedgehog pathway activation.<sup id="cite_ref-pmid16136078_15-0" class="reference"><a href="#cite_note-pmid16136078-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Conversely, SMO can become constitutively localized to the primary cilium and potentially activate pathway signaling constitutively as a result of a tryptophan to leucine mutation in the aforementioned domain.<sup id="cite_ref-Wang_2009_16-0" class="reference"><a href="#cite_note-Wang_2009-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> SMO has been shown to move during patched stimulation from the plasma membrane near the primary cilium to the ciliary membrane itself via a lateral transport pathway along the membrane, as opposed to via directed transport by vesicles. The cAMP-PKA pathway is known to promote the lateral movement of SMO and hedgehog signal transduction in general.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> In invertebrates like <i>Drosophila,</i> SMO does not organize at cilia and instead is generally translocated to the plasma membrane following hedgehog binding to patched.<sup id="cite_ref-Arensdorf_2016_18-0" class="reference"><a href="#cite_note-Arensdorf_2016-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p><p>After cellular localization, SMO must additionally be activated by a distinct mechanism in order to stimulate hedgehog signal transduction, but that mechanism is unknown.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> There is evidence for the existence of an unidentified endogenous ligand that binds SMO and activates it. It is believed that mutations in SMO can mimic the ligand-induced conformation of SMO and activate constitutive signal transduction.<sup id="cite_ref-Arensdorf_2016_18-1" class="reference"><a href="#cite_note-Arensdorf_2016-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p><p>SMO plays a key role in transcriptional repression and activation by the zinc-finger transcription factor <a href="/wiki/Cubitus_interruptus" class="mw-redirect" title="Cubitus interruptus">Cubitus interruptus</a> (Ci; known as Gli in vertebrates). When the hedgehog pathway is inactive, a complex of Fused (Fu), Suppressor of Fused (Sufu), and the <a href="/wiki/Kinesin" title="Kinesin">kinesin</a> motor protein <a href="/w/index.php?title=Costal-2&action=edit&redlink=1" class="new" title="Costal-2 (page does not exist)">Costal-2</a> (Cos2) tether Ci to microtubules. In this complex, Cos2 promotes proteolytic cleavage of Ci by activating <a href="/wiki/Hyperphosphorylation" class="mw-redirect" title="Hyperphosphorylation">hyperphosphorylation</a> of Ci and subsequent recruitment of ubiquitin ligase; the cleaved Ci goes on to act as a repressor of hedgehog-activated transcription. However, when hedgehog signaling is active, Ci remains intact and acts as a transcriptional activator of the same genes that its cleaved form suppresses.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> SMO has been shown to bind Costal-2 and play a role in the localization of the Ci complex and prevention of Ci cleavage.<sup id="cite_ref-pmid14636583_22-0" class="reference"><a href="#cite_note-pmid14636583-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Additionally, it is known that vertebrate SMO contributes to the activation of Gli as a transcription factor via association with ciliary structures such as <a href="/wiki/EVC2" class="mw-redirect" title="EVC2">Evc2</a>, but these mechanisms are not fully understood.<sup id="cite_ref-Arensdorf_2016_18-2" class="reference"><a href="#cite_note-Arensdorf_2016-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Endogenous_activation">Endogenous activation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=2" title="Edit section: Endogenous activation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Smo_SterolBindingSites.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Smo_SterolBindingSites.png/220px-Smo_SterolBindingSites.png" decoding="async" width="220" height="313" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Smo_SterolBindingSites.png/330px-Smo_SterolBindingSites.png 1.5x, //upload.wikimedia.org/wikipedia/commons/9/98/Smo_SterolBindingSites.png 2x" data-file-width="370" data-file-height="527" /></a><figcaption>Sterol Binding Sites in Smo CRD and TMD</figcaption></figure> <p>A leading hypothesis in the field is that Ptc regulates Smo by gating its access to <a href="/wiki/Cholesterol" title="Cholesterol">cholesterol</a> or a related sterol.<sup id="cite_ref-pmid31369952_24-0" class="reference"><a href="#cite_note-pmid31369952-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> It has been proposed that cholesterol activates Smo, and subsequently Hh signaling, by entering the active site through a hydrophobic “oxysterol tunnel,” which can adopt open or closed conformations to allow for activation or inactivation of Smo, respectively, due to allowed sterol binding.<sup id="cite_ref-pmid31263273_25-0" class="reference"><a href="#cite_note-pmid31263273-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid31247512_26-0" class="reference"><a href="#cite_note-pmid31247512-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> Shh would work by inhibiting Ptc, which would increase accessible cholesterol concentrations and allow for the activation of Smo and transmission of the Hh signal.<sup id="cite_ref-pmid31657721_27-0" class="reference"><a href="#cite_note-pmid31657721-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> A recent crystal structure has identified two sterol binding sites in Smo, but which site is endogenously regulated by Ptc remains to be determined. The potential sites of regulation include the extracellular cysteine-rich domain (CRD) of Smo, as well as a site deep within the transmembrane domain (TMD).<sup id="cite_ref-pmid27705744_28-0" class="reference"><a href="#cite_note-pmid27705744-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid30595453_29-0" class="reference"><a href="#cite_note-pmid30595453-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid29268141_30-0" class="reference"><a href="#cite_note-pmid29268141-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p><p>Due to the abundance of cholesterol in the plasma membrane (up to 50 mole %), it has also been proposed that Ptc regulates the activity of Smo by controlling cholesterol accessibility specifically within the membrane of the <a href="/wiki/Primary_cilia" class="mw-redirect" title="Primary cilia">primary cilia</a>, which contains a less abundant, and therefore more readily regulated pool of accessible cholesterol.<sup id="cite_ref-pmid27705744_28-1" class="reference"><a href="#cite_note-pmid27705744-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid32084300_31-0" class="reference"><a href="#cite_note-pmid32084300-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p><p>Typically, upon activation and release of inhibition by Ptc, Smo will relocate to the primary cilia and Ptc will diffuse out of the ciliary membrane.<sup id="cite_ref-pmid30819883_32-0" class="reference"><a href="#cite_note-pmid30819883-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> Upon inactivation, Smo no longer becomes concentrated in the ciliary membrane, This hypothesis is supported by methods which can increase or deplete the accessible cholesterol pool, with a subsequent increase or decrease in Hh signaling. This accessible cholesterol pool has been shown to be distinct from the general plasma membrane cholesterol pool in being available for protein interaction and cell uptake. The ciliary membrane has also been shown to contain lower levels of accessible cholesterol due to sequestering of cholesterol by <a href="/wiki/Sphingomyelin" title="Sphingomyelin">sphingomyelin</a>. In addition to cholesterol’s role as a Hh pathway agonist, it has been shown that cholesterol levels within the ciliary membrane rapidly increase upon treatment with Shh only in the presence of Ptc, further suggesting Ptc regulation of accessible cholesterol as the mechanism behind Smo activation/inhibition.<sup id="cite_ref-pmid31657721_27-1" class="reference"><a href="#cite_note-pmid31657721-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> Additionally, Molecular Dynamics simulations suggest that vismodegib inhibits Smo through a conformational change that prevents cholesterol from binding.<sup id="cite_ref-pmid31214579_33-0" class="reference"><a href="#cite_note-pmid31214579-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> This suggests the hypothesis that Ptc functions by preventing Smo access to cholesterol, and upon Ptc inhibition by Shh, Smo gains access to cholesterol and is subsequently activated, transmitting the Hh signal. </p> <div class="mw-heading mw-heading2"><h2 id="Role_in_disease">Role in disease</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=3" title="Edit section: Role in disease"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>SMO can function as an <a href="/wiki/Oncogene" title="Oncogene">oncogene</a>. Activating SMO mutations can lead to unregulated activation of the hedgehog pathway and serve as driving mutations for cancers such as <a href="/wiki/Medulloblastoma" title="Medulloblastoma">medulloblastoma</a>, <a href="/wiki/Basal-cell_carcinoma" title="Basal-cell carcinoma">basal-cell carcinoma</a>, <a href="/wiki/Pancreatic_cancer" title="Pancreatic cancer">pancreatic cancer</a>, and <a href="/wiki/Prostate_cancer" title="Prostate cancer">prostate cancer</a>.<sup id="cite_ref-Wang_2009_16-1" class="reference"><a href="#cite_note-Wang_2009-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-pmid9422511_34-0" class="reference"><a href="#cite_note-pmid9422511-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> As such, SMO is an attractive cancer drug target, along with the many hedgehog pathway agonists and antagonists that are known to directly target SMO.<sup id="cite_ref-Wang_2009_16-2" class="reference"><a href="#cite_note-Wang_2009-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/Cholesterol" title="Cholesterol">Cholesterol</a> is known to be crucial in regulating the overall hedgehog pathway, and congenital mutations in cholesterol synthesis pathways can inactivate SMO specifically, leading to developmental disorders.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> For example, <a href="/wiki/Oxysterol" title="Oxysterol">oxysterol</a> 20(S)-OHC is known to activate vertebrate SMO by binding the cysteine rich domain near its extracellular amino-terminal region. In the context of cancer, 20(S)-OHC is the target of a proposed anti-cancer oxysterol binding inhibitor.<sup id="cite_ref-Arensdorf_2016_18-3" class="reference"><a href="#cite_note-Arensdorf_2016-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Agonists">Agonists</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=4" title="Edit section: Agonists"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Smoothened_agonist" title="Smoothened agonist">Smoothened agonist</a> (SAG)</li> <li><a href="/wiki/Purmorphamine" title="Purmorphamine">Purmorphamine</a></li> <li><a href="/wiki/Oxysterols" class="mw-redirect" title="Oxysterols">Oxysterols</a> including <a href="/w/index.php?title=20(S)-OHC&action=edit&redlink=1" class="new" title="20(S)-OHC (page does not exist)">20(S)-OHC</a> and <a href="/w/index.php?title=20(S)-yne&action=edit&redlink=1" class="new" title="20(S)-yne (page does not exist)">20(S)-yne</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Antagonists">Antagonists</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=5" title="Edit section: Antagonists"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Cyclopamine" title="Cyclopamine">Cyclopamine</a></li> <li><a href="/wiki/Itraconazole" title="Itraconazole">Itraconazole</a></li> <li><a href="/wiki/Vismodegib" title="Vismodegib">Vismodegib</a> (Erivedge), a smoothened receptor inhibitor for the treatment of <a href="/wiki/Basal-cell_carcinoma" title="Basal-cell carcinoma">basal-cell carcinoma</a>, being investigated for the treatment of other types of cancer</li> <li><a href="/w/index.php?title=SANT-1&action=edit&redlink=1" class="new" title="SANT-1 (page does not exist)">SANT-1</a></li> <li><a href="/wiki/Sonidegib" title="Sonidegib">Sonidegib</a></li> <li><a href="/w/index.php?title=Patidegib&action=edit&redlink=1" class="new" title="Patidegib (page does not exist)">Patidegib</a><sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Glasdegib" title="Glasdegib">Glasdegib</a></li> <li><a href="/wiki/Jervine" title="Jervine">Jervine</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Frizzled" title="Frizzled">Frizzled</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output 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href="https://www.cancer.gov/publications/dictionaries/cancer-drug/def/patidegib">Patidegib</a></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Smoothened&action=edit&section=8" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239549316">.mw-parser-output .refbegin{margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li{page-break-inside:avoid;break-inside:avoid-column}@media screen{.mw-parser-output .refbegin{font-size:90%}}</style><div class="refbegin refbegin-columns references-column-width" style="column-width: 30em"> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFChenStruhl1996" class="citation journal cs1">Chen Y, Struhl G (November 1996). <a rel="nofollow" class="external text" href="https://doi.org/10.1016%2FS0092-8674%2800%2981374-4">"Dual roles for patched in sequestering and transducing Hedgehog"</a>. <i>Cell</i>. <b>87</b> (3): 553–63. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" 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International Union of Basic and Clinical Pharmacology. Archived from <a rel="nofollow" class="external text" href="http://www.iuphar-db.org/GPCR/ReceptorDisplayForward?receptorID=3069">the original</a> on 2015-02-25<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-10-25</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IUPHAR+Database+of+Receptors+and+Ion+Channels&rft.atitle=Frizzled+Receptors%3A+SMO&rft_id=http%3A%2F%2Fwww.iuphar-db.org%2FGPCR%2FReceptorDisplayForward%3FreceptorID%3D3069&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASmoothened" class="Z3988"></span></li> <li><a rel="nofollow" class="external text" href="https://meshb.nlm.nih.gov/record/ui?name=SMO+protein%2C+human">SMO+protein,+human</a> at the U.S. National Library of Medicine <a href="/wiki/Medical_Subject_Headings" title="Medical Subject Headings">Medical Subject Headings</a> (MeSH)</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:G_protein-coupled_receptors" title="Template:G protein-coupled receptors"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:G_protein-coupled_receptors" title="Template talk:G protein-coupled receptors"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:G_protein-coupled_receptors" title="Special:EditPage/Template:G protein-coupled receptors"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Cell_surface_receptor:_G_protein-coupled_receptors" style="font-size:114%;margin:0 4em"><a href="/wiki/Cell_surface_receptor" title="Cell surface receptor">Cell surface receptor</a>: <a href="/wiki/G_protein-coupled_receptor" title="G protein-coupled receptor">G protein-coupled receptors</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Class_A:_Rhodopsin-like" style="font-size:114%;margin:0 4em"><a href="/wiki/Rhodopsin-like_receptors" title="Rhodopsin-like receptors">Class A</a>: <a href="/wiki/Rhodopsin" title="Rhodopsin">Rhodopsin</a>-like</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Neurotransmitter_receptor" title="Neurotransmitter receptor">Neurotransmitter</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Adrenergic_receptor" title="Adrenergic receptor">Adrenergic</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alpha-1_adrenergic_receptor" title="Alpha-1 adrenergic receptor">α1</a> (<a href="/wiki/Alpha-1A_adrenergic_receptor" title="Alpha-1A adrenergic receptor">A</a></li> <li><a href="/wiki/Alpha-1B_adrenergic_receptor" title="Alpha-1B adrenergic receptor">B</a></li> <li><a href="/wiki/Alpha-1D_adrenergic_receptor" title="Alpha-1D adrenergic receptor">D</a>)</li> <li><a href="/wiki/Alpha-2_adrenergic_receptor" title="Alpha-2 adrenergic receptor">α2</a> (<a href="/wiki/Alpha-2A_adrenergic_receptor" title="Alpha-2A adrenergic receptor">A</a></li> <li><a href="/wiki/Alpha-2B_adrenergic_receptor" title="Alpha-2B adrenergic receptor">B</a></li> <li><a href="/wiki/Alpha-2C_adrenergic_receptor" title="Alpha-2C adrenergic receptor">C</a>)</li> <li><a href="/wiki/Beta-1_adrenergic_receptor" title="Beta-1 adrenergic receptor">β1</a></li> <li><a href="/wiki/Beta-2_adrenergic_receptor" title="Beta-2 adrenergic receptor">β2</a></li> <li><a href="/wiki/Beta-3_adrenergic_receptor" title="Beta-3 adrenergic receptor">β3</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Purinergic_receptor" title="Purinergic receptor">Purinergic</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adenosine_receptor" title="Adenosine receptor">Adenosine</a> (<a href="/wiki/Adenosine_A1_receptor" title="Adenosine A1 receptor">A1</a></li> <li><a href="/wiki/Adenosine_A2A_receptor" title="Adenosine A2A receptor">A2A</a></li> <li><a href="/wiki/Adenosine_A2B_receptor" title="Adenosine A2B receptor">A2B</a></li> <li><a href="/wiki/Adenosine_A3_receptor" title="Adenosine A3 receptor">A3</a>)</li> <li><a href="/wiki/P2Y_receptor" title="P2Y receptor">P2Y</a> (<a href="/wiki/P2RY1" title="P2RY1">1</a></li> <li><a href="/wiki/P2RY2" title="P2RY2">2</a></li> <li><a href="/wiki/P2RY4" title="P2RY4">4</a></li> <li><a href="/wiki/LPAR6" title="LPAR6">5</a></li> <li><a href="/wiki/P2RY6" title="P2RY6">6</a></li> <li><a href="/wiki/P2RY8" title="P2RY8">8</a></li> <li><a href="/wiki/GPR23" class="mw-redirect" title="GPR23">9</a></li> <li><a href="/wiki/P2RY10" title="P2RY10">10</a></li> <li><a href="/wiki/P2RY11" title="P2RY11">11</a></li> <li><a href="/wiki/P2Y12" title="P2Y12">12</a></li> <li><a href="/wiki/P2RY13" title="P2RY13">13</a></li> <li><a href="/wiki/P2RY14" title="P2RY14">14</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/5-HT_receptor" title="5-HT receptor">Serotonin</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>(all but <a href="/wiki/5-HT3_receptor" title="5-HT3 receptor">5-HT3</a>)</i> <a href="/wiki/5-HT1_receptor" title="5-HT1 receptor">5-HT1</a> (<a href="/wiki/5-HT1A_receptor" title="5-HT1A receptor">A</a></li> <li><a href="/wiki/5-HT1B_receptor" title="5-HT1B receptor">B</a></li> <li><a href="/wiki/5-HT1D_receptor" title="5-HT1D receptor">D</a></li> <li><a href="/wiki/5-HT1E_receptor" title="5-HT1E receptor">E</a></li> <li><a href="/wiki/5-HT1F_receptor" title="5-HT1F receptor">F</a>)</li> <li><a href="/wiki/5-HT2_receptor" title="5-HT2 receptor">5-HT2</a> (<a href="/wiki/5-HT2A_receptor" title="5-HT2A receptor">A</a></li> <li><a href="/wiki/5-HT2B_receptor" title="5-HT2B receptor">B</a></li> <li><a href="/wiki/5-HT2C_receptor" title="5-HT2C receptor">C</a>)</li> <li><i>5-HT</i> (<a href="/wiki/5-HT4_receptor" title="5-HT4 receptor">4</a></li> <li><a href="/wiki/5-HT5A_receptor" title="5-HT5A receptor">5A</a></li> <li><a href="/wiki/5-HT6_receptor" title="5-HT6 receptor">6</a></li> <li><a href="/wiki/5-HT7_receptor" title="5-HT7 receptor">7</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Muscarinic_acetylcholine_receptor" title="Muscarinic acetylcholine receptor">Acetylcholine</a> (<a href="/wiki/Muscarinic_acetylcholine_receptor_M1" title="Muscarinic acetylcholine receptor M1">M1</a></li> <li><a href="/wiki/Muscarinic_acetylcholine_receptor_M2" title="Muscarinic acetylcholine receptor M2">M2</a></li> <li><a href="/wiki/Muscarinic_acetylcholine_receptor_M3" title="Muscarinic acetylcholine receptor M3">M3</a></li> <li><a href="/wiki/Muscarinic_acetylcholine_receptor_M4" title="Muscarinic acetylcholine receptor M4">M4</a></li> <li><a href="/wiki/Muscarinic_acetylcholine_receptor_M5" title="Muscarinic acetylcholine receptor M5">M5</a>)</li> <li><a href="/wiki/Dopamine_receptor" title="Dopamine receptor">Dopamine</a> <ul><li><a href="/wiki/Dopamine_receptor_D1" title="Dopamine receptor D1">D1</a></li> <li><a href="/wiki/Dopamine_receptor_D2" title="Dopamine receptor D2">D2</a></li> <li><a href="/wiki/Dopamine_receptor_D3" title="Dopamine receptor D3">D3</a></li> <li><a href="/wiki/Dopamine_receptor_D4" title="Dopamine receptor D4">D4</a></li> <li><a href="/wiki/Dopamine_receptor_D5" title="Dopamine receptor D5">D5</a></li></ul></li> <li><a href="/wiki/GHB_receptor" title="GHB receptor">GHB receptor</a></li> <li><a href="/wiki/Histamine_receptor" title="Histamine receptor">Histamine</a> <ul><li><a href="/wiki/Histamine_H1_receptor" title="Histamine H1 receptor">H1</a></li> <li><a href="/wiki/Histamine_H2_receptor" title="Histamine H2 receptor">H2</a></li> <li><a href="/wiki/Histamine_H3_receptor" title="Histamine H3 receptor">H3</a></li> <li><a href="/wiki/Histamine_H4_receptor" title="Histamine H4 receptor">H4</a></li></ul></li> <li><a href="/wiki/Melatonin_receptor" title="Melatonin receptor">Melatonin</a> (<a href="/wiki/Melatonin_receptor_1A" title="Melatonin receptor 1A">1A</a></li> <li><a href="/wiki/Melatonin_receptor_1B" title="Melatonin receptor 1B">1B</a></li> <li><a href="/wiki/Melatonin_receptor_1C" title="Melatonin receptor 1C">1C</a>)</li> <li><a href="/wiki/Trace_amine-associated_receptor" title="Trace amine-associated receptor">TAAR</a> (<a href="/wiki/TAAR1" title="TAAR1">1</a></li> <li><a href="/wiki/TAAR2" title="TAAR2">2</a></li> <li><a href="/wiki/TAAR5" title="TAAR5">5</a></li> <li><a href="/wiki/TAAR6" title="TAAR6">6</a></li> <li><a href="/wiki/TAAR8" title="TAAR8">8</a></li> <li><a href="/wiki/TAAR9" title="TAAR9">9</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Metabolites and<br />signaling molecules</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Eicosanoid_receptor" title="Eicosanoid receptor">Eicosanoid</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>CysLT</i> (<a href="/wiki/Cysteinyl_leukotriene_receptor_1" title="Cysteinyl leukotriene receptor 1">1</a></li> <li><a href="/wiki/Cysteinyl_leukotriene_receptor_2" title="Cysteinyl leukotriene receptor 2">2</a>)</li> <li><a href="/wiki/Leukotriene_B4" title="Leukotriene B4">LTB4</a> <ul><li><a href="/wiki/Leukotriene_B4_receptor" title="Leukotriene B4 receptor">1</a></li> <li><a href="/wiki/Leukotriene_B4_receptor_2" title="Leukotriene B4 receptor 2">2</a></li></ul></li> <li><a href="/wiki/Formyl_peptide_receptor_2" title="Formyl peptide receptor 2"> FPRL1</a></li> <li><a href="/wiki/Oxoeicosanoid_receptor_1" title="Oxoeicosanoid receptor 1">OXE</a></li> <li><a href="/wiki/Prostaglandin_receptor" title="Prostaglandin receptor">Prostaglandin</a> <ul><li><i>DP</i> (<a href="/wiki/Prostaglandin_D2_receptor" title="Prostaglandin D2 receptor">1</a></li> <li><a href="/wiki/GPR44" class="mw-redirect" title="GPR44">2</a>), <i>EP</i> (<a href="/wiki/EP1_receptor" class="mw-redirect" title="EP1 receptor">1</a></li> <li><a href="/wiki/Prostaglandin_E2_receptor" title="Prostaglandin E2 receptor">2</a></li> <li><a href="/wiki/Prostaglandin_E_receptor_3" class="mw-redirect" title="Prostaglandin E receptor 3">3</a></li> <li><a href="/wiki/EP4_receptor" class="mw-redirect" title="EP4 receptor">4</a>), <a href="/wiki/Prostaglandin_F_receptor" title="Prostaglandin F receptor">FP</a></li></ul></li> <li><a href="/wiki/Prostacyclin_receptor" title="Prostacyclin receptor">Prostacyclin</a></li> <li><a href="/wiki/Thromboxane_receptor" title="Thromboxane receptor">Thromboxane</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/G_protein-coupled_bile_acid_receptor" title="G protein-coupled bile acid receptor">Bile acid</a></li> <li><a href="/wiki/Cannabinoid_receptor" title="Cannabinoid receptor">Cannabinoid</a> (<a href="/wiki/Cannabinoid_receptor_type_1" class="mw-redirect" title="Cannabinoid receptor type 1">CB1</a></li> <li><a href="/wiki/Cannabinoid_receptor_type_2" class="mw-redirect" title="Cannabinoid receptor type 2">CB2</a>, <i>GPR</i> (<a href="/wiki/GPR18" class="mw-redirect" title="GPR18">18</a></li> <li><a href="/wiki/GPR55" title="GPR55">55</a></li> <li><a href="/wiki/GPR119" title="GPR119">119</a>))</li> <li><a href="/wiki/GPR183" title="GPR183">EBI2</a></li> <li><a href="/wiki/GPER" title="GPER">Estrogen</a></li> <li><a href="/wiki/Free_fatty_acid_receptor" title="Free fatty acid receptor">Free fatty acid</a> (<a href="/wiki/Free_fatty_acid_receptor_1" title="Free fatty acid receptor 1">1</a></li> <li><a href="/wiki/Free_fatty_acid_receptor_2" title="Free fatty acid receptor 2">2</a></li> <li><a href="/wiki/Free_fatty_acid_receptor_3" title="Free fatty acid receptor 3">3</a></li> <li><a href="/wiki/GPR42" title="GPR42">4</a>)</li> <li><a href="/wiki/Hydroxycarboxylic_acid_receptor" title="Hydroxycarboxylic acid receptor">Hydroxycarboxylic acids</a> <ul><li><a href="/wiki/Hydroxycarboxylic_acid_receptor_1" title="Hydroxycarboxylic acid receptor 1">1</a></li> <li><a href="/wiki/Hydroxycarboxylic_acid_receptor_2" title="Hydroxycarboxylic acid receptor 2">2</a></li> <li><a href="/wiki/Hydroxycarboxylic_acid_receptor_3" title="Hydroxycarboxylic acid receptor 3">3</a></li></ul></li> <li><a href="/wiki/Lysophosphatidic_acid" title="Lysophosphatidic acid">Lysophosphatidic acid</a> (<a href="/wiki/LPAR1" title="LPAR1">1</a></li> <li><a href="/wiki/LPAR2" title="LPAR2">2</a></li> <li><a href="/wiki/LPAR3" title="LPAR3">3</a></li> <li><a href="/wiki/LPAR4" title="LPAR4">4</a></li> <li><a href="/wiki/LPAR5" title="LPAR5">5</a></li> <li><a href="/wiki/LPAR6" title="LPAR6">6</a>)</li> <li><a href="/wiki/Lysophospholipid_receptor" title="Lysophospholipid receptor">Lysophospholipid</a> (<a href="/wiki/S1PR1" title="S1PR1">1</a></li> <li><a href="/wiki/LPAR1" title="LPAR1">2</a></li> <li><a href="/wiki/S1PR3" title="S1PR3">3</a></li> <li><a href="/wiki/LPAR2" title="LPAR2">4</a></li> <li><a href="/wiki/S1PR2" title="S1PR2">5</a></li> <li><a href="/wiki/S1PR4" title="S1PR4">6</a></li> <li><a href="/wiki/LPAR3" title="LPAR3">7</a></li> <li><a href="/wiki/S1PR5" title="S1PR5">8</a>)</li> <li><a href="/wiki/OXGR1" title="OXGR1">Oxoglutarate</a></li> <li><a href="/wiki/Platelet-activating_factor_receptor" title="Platelet-activating factor receptor">PAF</a></li> <li><a href="/wiki/Sphingosine-1-phosphate" title="Sphingosine-1-phosphate">Sphingosine-1-phosphate</a> (<a href="/wiki/S1PR1" title="S1PR1">1</a></li> <li><a href="/wiki/S1PR2" title="S1PR2">2</a></li> <li><a href="/wiki/S1PR3" title="S1PR3">3</a></li> <li><a href="/wiki/S1PR4" title="S1PR4">4</a></li> <li><a href="/wiki/S1PR5" title="S1PR5">5</a>)</li> <li><a href="/wiki/SUCNR1" title="SUCNR1">Succinate</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Peptide</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/GPCR_neuropeptide_receptor" title="GPCR neuropeptide receptor">Neuropeptide</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Neuropeptide_B/W_receptor" title="Neuropeptide B/W receptor">B/W</a> (<a href="/wiki/Neuropeptides_B/W_receptor_1" title="Neuropeptides B/W receptor 1">1</a></li> <li><a href="/wiki/Neuropeptides_B/W_receptor_2" title="Neuropeptides B/W receptor 2">2</a>)</li> <li><a href="/wiki/Neuropeptide_FF_receptor" title="Neuropeptide FF receptor">FF</a> (<a href="/wiki/Neuropeptide_FF_receptor_1" title="Neuropeptide FF receptor 1">1</a></li> <li><a href="/wiki/Neuropeptide_FF_receptor_2" title="Neuropeptide FF receptor 2">2</a>)</li> <li><a href="/wiki/Neuropeptide_S_receptor" title="Neuropeptide S receptor">S</a></li> <li><a href="/wiki/Neuropeptide_Y_receptor" title="Neuropeptide Y receptor">Y</a> (<a href="/wiki/Neuropeptide_Y_receptor_Y1" title="Neuropeptide Y receptor Y1">1</a></li> <li><a href="/wiki/Neuropeptide_Y_receptor_Y2" title="Neuropeptide Y receptor Y2">2</a></li> <li><a href="/wiki/Pancreatic_polypeptide_receptor_1" title="Pancreatic polypeptide receptor 1">4</a></li> <li><a href="/wiki/Neuropeptide_Y_receptor_Y5" title="Neuropeptide Y receptor Y5">5</a>)</li> <li><i>Neuromedin</i> (<a href="/wiki/Neuromedin_B_receptor" title="Neuromedin B receptor">B</a></li> <li><a href="/wiki/Neuromedin_U_receptor" title="Neuromedin U receptor">U</a> (<a href="/wiki/Neuromedin_U_receptor_1" title="Neuromedin U receptor 1">1</a></li> <li><a href="/wiki/Neuromedin_U_receptor_2" title="Neuromedin U receptor 2">2</a>))</li> <li><a href="/wiki/Neurotensin_receptor" title="Neurotensin receptor">Neurotensin</a> (<a href="/wiki/Neurotensin_receptor_1" title="Neurotensin receptor 1">1</a></li> <li><a href="/wiki/Neurotensin_receptor_2" title="Neurotensin receptor 2">2</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anaphylatoxin_receptors" title="Anaphylatoxin receptors">Anaphylatoxin</a> (<a href="/wiki/C3a_receptor" title="C3a receptor">C3a</a></li> <li>C5a (<a href="/wiki/C5a_receptor" title="C5a receptor">1</a></li> <li><a href="/wiki/C5AR2" title="C5AR2">2</a>))</li> <li><a href="/wiki/Angiotensin_receptor" class="mw-redirect" title="Angiotensin receptor">Angiotensin</a> (<a href="/wiki/Angiotensin_II_receptor_type_1" title="Angiotensin II receptor type 1">1</a></li> <li><a href="/wiki/Angiotensin_II_receptor_type_2" title="Angiotensin II receptor type 2">2</a>)</li> <li><a href="/wiki/Apelin_receptor" title="Apelin receptor">Apelin</a></li> <li><a href="/wiki/Bombesin_receptor" title="Bombesin receptor">Bombesin</a> <ul><li><a href="/wiki/Bombesin-like_receptor_3" title="Bombesin-like receptor 3">BRS3</a></li> <li><a href="/wiki/Gastrin-releasing_peptide_receptor" title="Gastrin-releasing peptide receptor">GRPR</a></li> <li><a href="/wiki/Neuromedin_B_receptor" title="Neuromedin B receptor">NMBR</a>)</li> <li><a href="/wiki/Bradykinin_receptor" title="Bradykinin receptor">Bradykinin</a> (<a href="/wiki/Bradykinin_receptor_B1" title="Bradykinin receptor B1">B1</a></li> <li><a href="/wiki/Bradykinin_receptor_B2" title="Bradykinin receptor B2">B2</a>)</li></ul></li> <li><a href="/wiki/Chemokine_receptor" title="Chemokine receptor">Chemokine</a></li> <li><a href="/wiki/Cholecystokinin_receptor" title="Cholecystokinin receptor">Cholecystokinin</a> (<a href="/wiki/Cholecystokinin_A_receptor" title="Cholecystokinin A receptor">A</a></li> <li><a href="/wiki/Cholecystokinin_B_receptor" title="Cholecystokinin B receptor">B</a>)</li> <li><a href="/wiki/Endothelin_receptor" title="Endothelin receptor">Endothelin</a> <ul><li><a href="/wiki/Endothelin_A_receptor" title="Endothelin A receptor">A</a></li> <li><a href="/wiki/Endothelin_B_receptor" class="mw-redirect" title="Endothelin B receptor">B</a></li></ul></li> <li><a href="/wiki/Formyl_peptide_receptor" title="Formyl peptide receptor">Formyl peptide</a> (<a href="/wiki/Formyl_peptide_receptor_1" title="Formyl peptide receptor 1">1</a></li> <li><a href="/wiki/Formyl_peptide_receptor_2" title="Formyl peptide receptor 2">2</a></li> <li><a href="/wiki/Formyl_peptide_receptor_3" title="Formyl peptide receptor 3">3</a>)</li> <li><a href="/wiki/Follicle-stimulating_hormone_receptor" title="Follicle-stimulating hormone receptor">FSH</a></li> <li><a href="/wiki/Galanin_receptor" title="Galanin receptor">Galanin</a> (<a href="/wiki/Galanin_receptor_1" title="Galanin receptor 1">1</a></li> <li><a href="/wiki/Galanin_receptor_2" title="Galanin receptor 2">2</a></li> <li><a href="/wiki/Galanin_receptor_3" title="Galanin receptor 3">3</a>)</li> <li><a href="/wiki/Gonadotropin-releasing_hormone_receptor" title="Gonadotropin-releasing hormone receptor">Gonadotropin-releasing hormone</a> (<a href="/wiki/GNRHR" title="GNRHR">1</a></li> <li><a href="/wiki/GNRHR2" title="GNRHR2">2</a>)</li> <li><a href="/wiki/Growth_hormone_secretagogue_receptor" title="Growth hormone secretagogue receptor">Ghrelin</a></li> <li><a href="/wiki/KiSS1-derived_peptide_receptor" title="KiSS1-derived peptide receptor"> Kisspeptin</a></li> <li><a href="/wiki/Luteinizing_hormone/choriogonadotropin_receptor" title="Luteinizing hormone/choriogonadotropin receptor">Luteinizing hormone/choriogonadotropin</a></li> <li><a href="/wiki/MAS1_oncogene" title="MAS1 oncogene">MAS</a> (<a href="/wiki/MAS1" title="MAS1">1</a></li> <li><a href="/wiki/MAS1L" title="MAS1L">1L</a></li> <li><a href="/wiki/MRGPRD" title="MRGPRD">D</a></li> <li><a href="/wiki/MRGPRE" title="MRGPRE">E</a></li> <li><a href="/wiki/MRGPRF" title="MRGPRF">F</a></li> <li><a href="/wiki/MRGPRG" title="MRGPRG">G</a></li> <li><a href="/wiki/MRGPRX1" title="MRGPRX1">X1</a></li> <li><a href="/wiki/MRGPRX2" title="MRGPRX2">X2</a></li> <li><a href="/wiki/MRGPRX3" title="MRGPRX3">X3</a></li> <li><a href="/wiki/MRGPRX4" title="MRGPRX4">X4</a>)</li> <li><a href="/wiki/Melanocortin_receptor" title="Melanocortin receptor">Melanocortin</a> (<a href="/wiki/Melanocortin_1_receptor" title="Melanocortin 1 receptor">1</a></li> <li><a href="/wiki/ACTH_receptor" title="ACTH receptor">2</a></li> <li><a href="/wiki/Melanocortin_3_receptor" title="Melanocortin 3 receptor">3</a></li> <li><a href="/wiki/Melanocortin_4_receptor" title="Melanocortin 4 receptor">4</a></li> <li><a href="/wiki/Melanocortin_5_receptor" title="Melanocortin 5 receptor">5</a>)</li> <li><a href="/wiki/Melanin-concentrating_hormone_receptor" title="Melanin-concentrating hormone receptor">MCHR</a> (<a href="/wiki/Melanin-concentrating_hormone_receptor_1" title="Melanin-concentrating hormone receptor 1">1</a></li> <li><a href="/wiki/Melanin-concentrating_hormone_receptor_2" title="Melanin-concentrating hormone receptor 2">2</a>)</li> <li><a href="/wiki/Motilin_receptor" title="Motilin receptor">Motilin</a></li> <li><a href="/wiki/Opioid_receptor" title="Opioid receptor">Opioid</a> (<a href="/wiki/%CE%94-opioid_receptor" title="Δ-opioid receptor">Delta</a></li> <li><a href="/wiki/%CE%9A-opioid_receptor" title="Κ-opioid receptor">Kappa</a></li> <li><a href="/wiki/%CE%9C-opioid_receptor" title="Μ-opioid receptor">Mu</a></li> <li><a href="/wiki/Nociceptin_receptor" title="Nociceptin receptor">Nociceptin</a> & <a href="/wiki/OGFr" title="OGFr">Zeta</a>, but not <a href="/wiki/Sigma_receptor" title="Sigma receptor">Sigma</a>)</li> <li><a href="/wiki/Orexin_receptor" title="Orexin receptor">Orexin</a> (<a href="/wiki/Hypocretin_(orexin)_receptor_1" title="Hypocretin (orexin) receptor 1">1</a></li> <li><a href="/wiki/Hypocretin_(orexin)_receptor_2" title="Hypocretin (orexin) receptor 2">2</a>)</li> <li><a href="/wiki/Oxytocin_receptor" title="Oxytocin receptor">Oxytocin</a></li> <li><a href="/wiki/Prokineticin_receptor" title="Prokineticin receptor">Prokineticin</a> (<a href="/wiki/Prokineticin_receptor_1" title="Prokineticin receptor 1">1</a></li> <li><a href="/wiki/Prokineticin_receptor_2" title="Prokineticin receptor 2">2</a>)</li> <li><a href="/wiki/Prolactin-releasing_peptide_receptor" title="Prolactin-releasing peptide receptor">Prolactin-releasing peptide</a></li> <li><a href="/wiki/Relaxin_receptor" title="Relaxin receptor">Relaxin</a> (<a href="/wiki/Relaxin/insulin-like_family_peptide_receptor_1" title="Relaxin/insulin-like family peptide receptor 1">1</a></li> <li><a href="/wiki/Relaxin/insulin-like_family_peptide_receptor_2" title="Relaxin/insulin-like family peptide receptor 2">2</a></li> <li><a href="/wiki/Relaxin/insulin-like_family_peptide_receptor_3" title="Relaxin/insulin-like family peptide receptor 3">3</a></li> <li><a href="/wiki/Relaxin/insulin-like_family_peptide_receptor_4" title="Relaxin/insulin-like family peptide receptor 4">4</a>)</li> <li><a href="/wiki/Somatostatin_receptor" title="Somatostatin receptor">Somatostatin</a> (<a href="/wiki/Somatostatin_receptor_1" title="Somatostatin receptor 1">1</a></li> <li><a href="/wiki/Somatostatin_receptor_2" title="Somatostatin receptor 2">2</a></li> <li><a href="/wiki/Somatostatin_receptor_3" title="Somatostatin receptor 3">3</a></li> <li><a href="/wiki/Somatostatin_receptor_4" title="Somatostatin receptor 4">4</a></li> <li><a href="/wiki/Somatostatin_receptor_5" title="Somatostatin receptor 5">5</a>)</li> <li><a href="/wiki/Tachykinin_receptor" title="Tachykinin receptor">Tachykinin</a> (<a href="/wiki/Tachykinin_receptor_1" title="Tachykinin receptor 1">1</a></li> <li><a href="/wiki/Tachykinin_receptor_2" title="Tachykinin receptor 2">2</a></li> <li><a href="/wiki/Tachykinin_receptor_3" title="Tachykinin receptor 3">3</a>)</li> <li><a href="/wiki/Thyrotropin_receptor" title="Thyrotropin receptor">Thyrotropin</a></li> <li><a href="/wiki/Thyrotropin-releasing_hormone_receptor" title="Thyrotropin-releasing hormone receptor">Thyrotropin-releasing hormone</a></li> <li><a href="/wiki/Urotensin-II_receptor" title="Urotensin-II receptor">Urotensin-II</a></li> <li><a href="/wiki/Vasopressin_receptor" title="Vasopressin receptor">Vasopressin</a> (<a href="/wiki/Arginine_vasopressin_receptor_1A" class="mw-redirect" title="Arginine vasopressin receptor 1A">1A</a></li> <li><a href="/wiki/Arginine_vasopressin_receptor_1B" class="mw-redirect" title="Arginine vasopressin receptor 1B">1B</a></li> <li><a href="/wiki/Arginine_vasopressin_receptor_2" class="mw-redirect" title="Arginine vasopressin receptor 2">2</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;">Miscellaneous</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Taste_receptor" title="Taste receptor">Taste</a>, bitter</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>TAS2R</i> <ul><li><a href="/wiki/TAS2R1" title="TAS2R1">1</a></li> <li><a href="/wiki/TAS2R3" title="TAS2R3">3</a></li> <li><a href="/wiki/TAS2R4" title="TAS2R4">4</a></li> <li><a href="/wiki/TAS2R5" title="TAS2R5">5</a></li> <li><a href="/wiki/TAS2R7" title="TAS2R7">7</a></li> <li><a href="/wiki/TAS2R8" title="TAS2R8">8</a></li> <li><a href="/wiki/TAS2R9" title="TAS2R9">9</a></li> <li><a href="/wiki/TAS2R10" title="TAS2R10">10</a></li> <li><a href="/wiki/TAS2R13" title="TAS2R13">13</a></li> <li><a href="/wiki/TAS2R14" title="TAS2R14">14</a></li> <li><a href="/wiki/TAS2R16" title="TAS2R16">16</a></li> <li><a href="/wiki/TAS2R19" title="TAS2R19">19</a></li> <li><a href="/wiki/TAS2R20" title="TAS2R20">20</a></li> <li><a href="/wiki/TAS2R30" title="TAS2R30">30</a></li> <li><a href="/wiki/TAS2R31" title="TAS2R31">31</a></li> <li><a href="/wiki/TAS2R38" title="TAS2R38">38</a></li> <li><a href="/wiki/TAS2R39" title="TAS2R39">39</a></li> <li><a href="/wiki/TAS2R40" title="TAS2R40">40</a></li> <li><a href="/wiki/TAS2R41" title="TAS2R41">41</a></li> <li><a href="/wiki/TAS2R42" title="TAS2R42">42</a></li> <li><a href="/wiki/TAS2R43" title="TAS2R43">43</a></li> <li><a href="/wiki/TAS2R45" title="TAS2R45">45</a></li> <li><a href="/wiki/TAS2R46" title="TAS2R46">46</a></li> <li><a href="/wiki/TAS2R50" title="TAS2R50">50</a></li> <li><a href="/wiki/TAS2R60" title="TAS2R60">60</a></li></ul></li> <li><a href="/wiki/Vomeronasal_receptor" title="Vomeronasal receptor">Vomeronasal receptor</a> type 1</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><a href="/wiki/Orphan_receptor" title="Orphan receptor">Orphan</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>GPR</i> (<a href="/wiki/GPR1" title="GPR1">1</a></li> <li><a href="/wiki/GPR3" title="GPR3">3</a></li> <li><a href="/wiki/GPR4" title="GPR4">4</a></li> <li><a href="/wiki/GPR6" title="GPR6">6</a></li> <li><a href="/wiki/GPR12" title="GPR12">12</a></li> <li><a href="/wiki/GPR15" title="GPR15">15</a></li> <li><a href="/wiki/GPR17" title="GPR17">17</a></li> <li><a href="/wiki/GPR18" class="mw-redirect" title="GPR18">18</a></li> <li><a href="/wiki/GPR19" title="GPR19">19</a></li> <li><a href="/wiki/GPR20" title="GPR20">20</a></li> <li><a href="/wiki/GPR21" title="GPR21">21</a></li> <li><a href="/wiki/GPR22" title="GPR22">22</a></li> <li><a href="/wiki/LPAR4" title="LPAR4">23</a></li> <li><a href="/wiki/GPR25" title="GPR25">25</a></li> <li><a href="/wiki/GPR26" title="GPR26">26</a></li> <li><a href="/wiki/GPR27" title="GPR27">27</a></li> <li><a href="/wiki/GPR31" title="GPR31">31</a></li> <li><a href="/wiki/GPR32" title="GPR32">32</a></li> <li><a href="/wiki/GPR33" title="GPR33">33</a></li> <li><a href="/wiki/GPR34" title="GPR34">34</a></li> <li><a href="/wiki/GPR35" title="GPR35">35</a></li> <li><a href="/wiki/GPR37" title="GPR37">37</a></li> <li><a href="/wiki/GPR39" title="GPR39">39</a></li> <li><a href="/wiki/GPR42" title="GPR42">42</a></li> <li><a href="/wiki/GPR44" class="mw-redirect" title="GPR44">44</a></li> <li><a href="/wiki/GPR45" title="GPR45">45</a></li> <li><a href="/wiki/GPR50" title="GPR50">50</a></li> <li><a href="/wiki/GPR52" title="GPR52">52</a></li> <li><a href="/wiki/GPR55" title="GPR55">55</a></li> <li><a href="/wiki/GPR61" title="GPR61">61</a></li> <li><a href="/wiki/GPR62" title="GPR62">62</a></li> <li><a href="/wiki/GPR63" title="GPR63">63</a></li> <li><a href="/wiki/GPR65" title="GPR65">65</a></li> <li><a href="/wiki/GPR68" title="GPR68">68</a></li> <li><a href="/wiki/GPR75" title="GPR75">75</a></li> <li><a href="/wiki/GPR78" title="GPR78">78</a></li> <li><a href="/wiki/GPR81" class="mw-redirect" title="GPR81">81</a></li> <li><a href="/wiki/GPR82" title="GPR82">82</a></li> <li><a href="/wiki/GPR83" title="GPR83">83</a></li> <li><a href="/wiki/GPR84" title="GPR84">84</a></li> <li><a href="/wiki/GPR85" title="GPR85">85</a></li> <li><a href="/wiki/GPR87" title="GPR87">87</a></li> <li><a href="/wiki/GPR88" title="GPR88">88</a></li> <li><a href="/wiki/LPAR5" title="LPAR5">92</a></li> <li><a href="/wiki/GPR101" title="GPR101">101</a></li> <li><a href="/wiki/Pyroglutamylated_RFamide_peptide_receptor" title="Pyroglutamylated RFamide peptide receptor">103</a></li> <li><a href="/wiki/Niacin_receptor_1" class="mw-redirect" title="Niacin receptor 1">109A</a></li> <li><a href="/wiki/Niacin_receptor_2" class="mw-redirect" title="Niacin receptor 2">109B</a></li> <li><a href="/wiki/GPR119" title="GPR119">119</a></li> <li><a href="/wiki/GPR120" class="mw-redirect" title="GPR120">120</a></li> <li><a href="/wiki/GPR132" title="GPR132">132</a></li> <li><a href="/wiki/GPR135" title="GPR135">135</a></li> <li><a href="/wiki/GPR137B" title="GPR137B">137B</a></li> <li><a href="/wiki/GPR139" title="GPR139">139</a></li> <li><a href="/wiki/GPR141" title="GPR141">141</a></li> <li><a href="/wiki/GPR142" title="GPR142">142</a></li> <li><a href="/wiki/GPR146" title="GPR146">146</a></li> <li><a href="/wiki/GPR148" title="GPR148">148</a></li> <li><a href="/wiki/GPR149" title="GPR149">149</a></li> <li><a href="/wiki/GPR150" title="GPR150">150</a></li> <li><a href="/wiki/GPR151" title="GPR151">151</a></li> <li><a href="/wiki/GPR152" title="GPR152">152</a></li> <li><a href="/wiki/GPR153" title="GPR153">153</a></li> <li><a href="/wiki/GPR160" title="GPR160">160</a></li> <li><a href="/wiki/GPR161" title="GPR161">161</a></li> <li><a href="/wiki/GPR162" title="GPR162">162</a></li> <li><a href="/wiki/GPR171" title="GPR171">171</a></li> <li><a href="/wiki/GPR173" title="GPR173">173</a></li> <li><a href="/wiki/GPR174" title="GPR174">174</a></li> <li><a href="/wiki/GPR176" title="GPR176">176</a></li> <li><a href="/wiki/GPR177" class="mw-redirect" title="GPR177">177</a></li> <li><a href="/wiki/GPR182" title="GPR182">182</a></li> <li><a href="/wiki/GPR183" title="GPR183">183</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7em;text-align:left;"><i>Other</i></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GPR182" title="GPR182">Adrenomedullin</a></li> <li><a href="/wiki/Olfactory_receptor" title="Olfactory receptor">Olfactory</a></li> <li><a href="/wiki/Opsin" title="Opsin">Opsin</a> (<a href="/wiki/OPN3" title="OPN3">3</a></li> <li><a href="/wiki/Melanopsin" title="Melanopsin">4</a></li> <li><a href="/wiki/OPN5" title="OPN5">5</a></li> <li><a href="/wiki/OPN1LW" title="OPN1LW">1LW</a></li> <li><a href="/wiki/OPN1MW" title="OPN1MW">1MW</a></li> <li><a href="/wiki/OPN1SW" title="OPN1SW">1SW</a></li> <li><a href="/wiki/Retinal_G_protein_coupled_receptor" title="Retinal G protein coupled receptor">RGR</a></li> <li><a href="/wiki/RRH" title="RRH">RRH</a>)</li> <li><a href="/wiki/Protease-activated_receptor" title="Protease-activated receptor">Protease-activated</a> (<a href="/wiki/Coagulation_factor_II_receptor" class="mw-redirect" title="Coagulation factor II receptor">1</a></li> <li><a href="/wiki/Protease_activated_receptor_2" class="mw-redirect" title="Protease activated receptor 2">2</a></li> <li><a href="/wiki/F2RL2" title="F2RL2">3</a></li> <li><a href="/wiki/F2RL3" title="F2RL3">4</a>)</li> <li><a href="/wiki/Super_Conserved_Receptor_Expressed_in_Brain" title="Super Conserved Receptor Expressed in Brain">SREB</a> (<a href="/wiki/GPR27" title="GPR27">1</a></li> <li><a href="/wiki/GPR85" title="GPR85">2</a></li> <li><a href="/wiki/GPR173" title="GPR173">3</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Class_B:_Secretin-like" style="font-size:114%;margin:0 4em"><a href="/wiki/Secretin_receptor_family" title="Secretin receptor family">Class B</a>: <a href="/wiki/Secretin_receptor" title="Secretin receptor">Secretin</a>-like</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;"><a href="/wiki/Adhesion_G_protein-coupled_receptor" title="Adhesion G protein-coupled receptor">Adhesion</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>ADGRB</i> <ul><li><a href="/wiki/Brain-specific_angiogenesis_inhibitor" title="Brain-specific angiogenesis inhibitor">Brain-specific angiogenesis inhibitor</a> <ul><li><a href="/wiki/Brain-specific_angiogenesis_inhibitor_1" title="Brain-specific angiogenesis inhibitor 1">1</a></li> <li><a href="/wiki/Brain-specific_angiogenesis_inhibitor_2" title="Brain-specific angiogenesis inhibitor 2">2</a></li> <li><a href="/wiki/Brain-specific_angiogenesis_inhibitor_3" title="Brain-specific angiogenesis inhibitor 3">3</a></li></ul></li></ul></li> <li><i>ADGRC</i> <ul><li><a href="/wiki/Flamingo_(protein)" title="Flamingo (protein)">Cadherin</a> <ul><li><a href="/wiki/CELSR1" title="CELSR1">1</a></li> <li><a href="/wiki/CELSR2" title="CELSR2">2</a></li> <li><a href="/wiki/CELSR3" title="CELSR3">3</a></li></ul></li></ul></li> <li><i>ADGRE</i> <ul><li><a href="/wiki/EGF_module-containing_mucin-like_hormone_receptor" title="EGF module-containing mucin-like hormone receptor">EMR</a> <ul><li><a href="/wiki/EMR1" title="EMR1">1</a></li> <li><a href="/wiki/EMR2" title="EMR2">2</a></li> <li><a href="/wiki/EMR3" title="EMR3">3</a></li></ul></li> <li><a href="/wiki/CD97" title="CD97">CD97</a></li></ul></li> <li><i>ADGRG</i> <ul><li><a href="/wiki/GPR56" title="GPR56">1</a></li> <li><a href="/wiki/GPR64" title="GPR64">2</a></li> <li><a href="/wiki/GPR97" title="GPR97">3</a></li> <li><a href="/wiki/GPR112" title="GPR112">4</a></li> <li><a href="/wiki/GPR114" title="GPR114">5</a></li> <li><a href="/wiki/GPR126" title="GPR126">6</a></li> <li><a href="/wiki/GPR128" title="GPR128">7</a></li></ul></li> <li><i>ADGRL</i> <ul><li><a href="/wiki/Latrophilin_receptor" class="mw-redirect" title="Latrophilin receptor">Latrophilin</a> <ul><li><a href="/wiki/Latrophilin_1" title="Latrophilin 1">1</a></li> <li><a href="/wiki/Latrophilin_2" title="Latrophilin 2">2</a></li> <li><a href="/wiki/Latrophilin_3" title="Latrophilin 3">3</a></li></ul></li> <li><a href="/wiki/ELTD1" class="mw-redirect" title="ELTD1">ELTD1</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;"><a href="/wiki/Orphan_receptor" title="Orphan receptor">Orphan</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>GPR</i> (<a href="/wiki/GPR56" title="GPR56">56</a></li> <li><a href="/wiki/GPR64" title="GPR64">64</a></li> <li><a href="/wiki/GPR97" title="GPR97">97</a></li> <li><a href="/wiki/GPR98" title="GPR98">98</a></li> <li><a href="/wiki/GPR110" title="GPR110">110</a></li> <li><a href="/wiki/GPR111" title="GPR111">111</a></li> <li><a href="/wiki/GPR112" title="GPR112">112</a></li> <li><a href="/wiki/GPR113" title="GPR113">113</a></li> <li><a href="/wiki/GPR114" title="GPR114">114</a></li> <li><a href="/wiki/GPR115" title="GPR115">115</a></li> <li><a href="/wiki/GPR116" title="GPR116">116</a></li> <li><a href="/wiki/GPR123" title="GPR123">123</a></li> <li><a href="/wiki/GPR124" title="GPR124">124</a></li> <li><a href="/wiki/GPR125" title="GPR125">125</a></li> <li><a href="/wiki/GPR126" title="GPR126">126</a></li> <li><a href="/wiki/GPR128" title="GPR128">128</a></li> <li><a href="/wiki/GPR133" title="GPR133">133</a></li> <li><a href="/wiki/GPR143" title="GPR143">143</a></li> <li><a href="/wiki/GPR144" title="GPR144">144</a></li> <li><a href="/wiki/GPR155" title="GPR155">155</a></li> <li><a href="/wiki/GPR157" title="GPR157">157</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;"><i>Other</i></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calcitonin_receptor" title="Calcitonin receptor">Calcitonin</a></li> <li><a href="/wiki/CALCRL" title="CALCRL">CALCRL</a></li> <li><a href="/wiki/Corticotropin-releasing_hormone_receptor" title="Corticotropin-releasing hormone receptor">Corticotropin-releasing hormone</a> (<a href="/wiki/Corticotropin-releasing_hormone_receptor_1" title="Corticotropin-releasing hormone receptor 1">1</a></li> <li><a href="/wiki/Corticotropin-releasing_hormone_receptor_2" title="Corticotropin-releasing hormone receptor 2">2</a>)</li> <li><a href="/wiki/Glucagon_receptor_family" title="Glucagon receptor family">Glucagon</a> (<a href="/wiki/Glucagon_receptor" title="Glucagon receptor">GR</a></li> <li><a href="/wiki/Gastric_inhibitory_polypeptide_receptor" title="Gastric inhibitory polypeptide receptor">GIPR</a></li> <li><a href="/wiki/Glucagon-like_peptide-1_receptor" title="Glucagon-like peptide-1 receptor">GLP1R</a></li> <li><a href="/wiki/Glucagon-like_peptide-2_receptor" title="Glucagon-like peptide-2 receptor">GLP2R</a>)</li> <li><a href="/wiki/Growth-hormone-releasing_hormone_receptor" title="Growth-hormone-releasing hormone receptor">Growth-hormone-releasing hormone</a></li> <li><a href="/wiki/ADCYAP1R1" title="ADCYAP1R1">PACAPR1</a></li> <li><a href="/wiki/Orphan_receptor" title="Orphan receptor">GPR</a></li> <li><a href="/wiki/Methuselah-like_proteins" title="Methuselah-like proteins">Methuselah-like proteins</a></li> <li><a href="/wiki/Parathyroid_hormone_receptor" title="Parathyroid hormone receptor">Parathyroid hormone</a> (<a href="/wiki/Parathyroid_hormone_1_receptor" title="Parathyroid hormone 1 receptor">1</a></li> <li><a href="/wiki/Parathyroid_hormone_2_receptor" title="Parathyroid hormone 2 receptor">2</a>)</li> <li><a href="/wiki/Secretin_receptor" title="Secretin receptor">Secretin</a></li> <li><a href="/wiki/Vasoactive_intestinal_peptide_receptor" title="Vasoactive intestinal peptide receptor">Vasoactive intestinal peptide</a> (<a href="/wiki/VIPR1" title="VIPR1">1</a></li> <li><a href="/wiki/VIPR2" title="VIPR2">2</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Class_C:_Metabotropic_glutamate_/_pheromone" style="font-size:114%;margin:0 4em"><a href="/wiki/Class_C_GPCR" title="Class C GPCR">Class C</a>: <a href="/wiki/Metabotropic_receptor" title="Metabotropic receptor">Metabotropic</a> <a href="/wiki/Metabotropic_glutamate_receptor" title="Metabotropic glutamate receptor">glutamate</a> / <a href="/wiki/Pheromone" title="Pheromone">pheromone</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;"><a href="/wiki/Taste_receptor" title="Taste receptor">Taste</a>, sweet</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i>TAS1R</i> <ul><li><a href="/wiki/TAS1R1" title="TAS1R1">1</a></li> <li><a href="/wiki/TAS1R2" title="TAS1R2">2</a></li> <li><a href="/wiki/TAS1R3" title="TAS1R3">3</a></li></ul></li> <li><a href="/wiki/Vomeronasal_receptor" title="Vomeronasal receptor">Vomeronasal receptor</a>, type 2</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;"><i>Other</i></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calcium-sensing_receptor" title="Calcium-sensing receptor">Calcium-sensing receptor</a></li> <li><a href="/wiki/GABA_receptor" title="GABA receptor">GABA<sub>B</sub></a> (<a href="/wiki/GABBR1" title="GABBR1">1</a></li> <li><a href="/wiki/GABBR2" title="GABBR2">2</a>)</li> <li><a href="/wiki/Glutamate_receptor" title="Glutamate receptor">Glutamate receptor</a> (<a href="/wiki/Metabotropic_glutamate_receptor" title="Metabotropic glutamate receptor">Metabotropic glutamate</a> (<a href="/wiki/Metabotropic_glutamate_receptor_1" title="Metabotropic glutamate receptor 1">1</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_2" title="Metabotropic glutamate receptor 2">2</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_3" title="Metabotropic glutamate receptor 3">3</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_4" title="Metabotropic glutamate receptor 4">4</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_5" title="Metabotropic glutamate receptor 5">5</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_6" title="Metabotropic glutamate receptor 6">6</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_7" title="Metabotropic glutamate receptor 7">7</a></li> <li><a href="/wiki/Metabotropic_glutamate_receptor_8" title="Metabotropic glutamate receptor 8">8</a>))</li> <li><a href="/wiki/GPRC6A" title="GPRC6A">GPRC6A</a></li> <li><a href="/wiki/Orphan_receptor" title="Orphan receptor">GPR</a> (<a href="/wiki/GPR156" title="GPR156">156</a></li> <li><a href="/wiki/GPR158" title="GPR158">158</a></li> <li><a href="/wiki/GPR179" title="GPR179">179</a>)</li> <li><a href="/wiki/Retinoic_acid-inducible_orphan_G_protein-coupled_receptor" title="Retinoic acid-inducible orphan G protein-coupled receptor">RAIG</a> (<a href="/wiki/GPRC5A" title="GPRC5A">1</a></li> <li><a href="/wiki/GPRC5B" title="GPRC5B">2</a></li> <li><a href="/wiki/GPRC5C" title="GPRC5C">3</a></li> <li><a href="/wiki/GPRC5D" title="GPRC5D">4</a>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible uncollapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Class_F:_Frizzled_&amp;_Smoothened" style="font-size:114%;margin:0 4em">Class F: <a href="/wiki/Frizzled" title="Frizzled">Frizzled</a> & <a class="mw-selflink selflink">Smoothened</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;">Frizzled</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Frizzled" title="Frizzled">Frizzled</a> (<a href="/wiki/FZD1" class="mw-redirect" title="FZD1">1</a></li> <li><a href="/wiki/FZD2" class="mw-redirect" title="FZD2">2</a></li> <li><a href="/wiki/FZD3" class="mw-redirect" title="FZD3">3</a></li> <li><a href="/wiki/FZD4" class="mw-redirect" title="FZD4">4</a></li> <li><a href="/wiki/FZD5" class="mw-redirect" title="FZD5">5</a></li> <li><a href="/wiki/FZD6" class="mw-redirect" title="FZD6">6</a></li> <li><a href="/wiki/FZD7" class="mw-redirect" title="FZD7">7</a></li> <li><a href="/wiki/FZD8" class="mw-redirect" title="FZD8">8</a></li> <li><a href="/wiki/FZD9" class="mw-redirect" title="FZD9">9</a></li> <li><a href="/wiki/FZD10" class="mw-redirect" title="FZD10">10</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em;text-align:left;">Smoothened</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">Smoothened</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Signaling_pathway:_hedgehog_signaling_pathway" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background:#e7dcc3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Hedgehog_signaling_pathway" title="Template:Hedgehog signaling pathway"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Hedgehog_signaling_pathway" title="Template talk:Hedgehog signaling pathway"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Hedgehog_signaling_pathway" title="Special:EditPage/Template:Hedgehog signaling pathway"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Signaling_pathway:_hedgehog_signaling_pathway" style="font-size:114%;margin:0 4em"><a href="/wiki/Signal_transduction" title="Signal transduction">Signaling pathway</a>: <a href="/wiki/Hedgehog_signaling_pathway" title="Hedgehog signaling pathway">hedgehog signaling pathway</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: AntiqueWhite"><a href="/wiki/Ligand" title="Ligand">Ligands</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sonic_hedgehog_(protein)" class="mw-redirect" title="Sonic hedgehog (protein)">Sonic hedgehog</a></li> <li><a href="/wiki/Indian_hedgehog_(protein)" title="Indian hedgehog (protein)">Indian hedgehog</a></li> <li><a href="/wiki/Desert_hedgehog_(protein)" title="Desert hedgehog (protein)">Desert hedgehog</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: AntiqueWhite"><a href="/wiki/Receptor_(biochemistry)" title="Receptor (biochemistry)">Receptor</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/PTCH1" title="PTCH1">Patched</a></li> <li><a class="mw-selflink selflink">Smoothened</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: AntiqueWhite"><a href="/wiki/Transcription_factor" title="Transcription factor">Transcription factor</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GLI1" title="GLI1">GLI1</a></li> <li><a href="/wiki/GLI2" title="GLI2">GLI2</a></li> <li><a href="/wiki/GLI3" title="GLI3">GLI3</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: AntiqueWhite">Other</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HHIP" title="HHIP">HHIP</a></li> <li><a href="/wiki/HHAT" title="HHAT">HHAT</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Smoothened&oldid=1214215042">https://en.wikipedia.org/w/index.php?title=Smoothened&oldid=1214215042</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Genes_on_human_chromosome_7" title="Category:Genes on human chromosome 7">Genes on human chromosome 7</a></li><li><a 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