Scientists at CRANN unlock vital information about triggers for neurodegenerative diseases - CRANN

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</header> <div class="tier-site-main main-content" id="main-content" role="main" lang="en"> <div class="tier-main-temporary"> <div class="lay-centered width-max"> <div class="lay tier-main-temporary-padding"> <h1>Scientists at CRANN unlock vital information about triggers for neurodegenerative diseases</h1> <p>16 May 2017</p> <p>A team of international researchers led by Prof Martin Hegner, Investigator in CRANN and Trinity’s School of Physics have for the first time observed how proteins fold while being produced in real time. This has significant implications for understanding protein synthesis generally and particularly in neurogenerative diseases such as Alzheimer’s and Parkinson’s. Their findings have been published today in the prestigious journal, Proceedings of the National Academy of Sciences*.</p> <p>Prof Hegner’s work focuses on individual ribosomes, complex molecules which use genetic information to assemble proteins. There can be several million ribosomes in a typical human cell and they are about 20 nanometres in diameter. The assembly of proteins is crucial for a healthy functioning body and all the proteins in our bodies must fold into complex shapes to do their job. While protein synthesis is of fundamental importance in cellular processes, how they are created is not fully understood. One of the events that occurs during protein synthesis is “folding”, where the chains of amino acids (polypeptides) fold into their final 3-dimensional structures.</p> <p>Several neurodegenerative diseases, e.g. Alzheimer’s and many allergies are believed to be as a result of misfolded proteins. This research is thus important in developing further understanding of such conditions and in developing drugs that can target and prevent certain foldings. There has been interest expressed in Prof Hegner’s work by pharmaceutical companies.</p> <p>Prof Hegner commented, “The ribosome translation machinery is a highly complex system, involving many different factors such as energy input, messenger RNA decoding, amino acids, as well as their relative movements and interactions. Investigating this system at the single-molecule level required a highly ambitious and multi-faceted approach that pushes the boundaries of what is technically possible.</p> <p>“We have identified key mechanisms within individual ribosomes using our unique optical tweezer instrumentation, of which there are only approximately 5 world-wide. Our expertise in the design of the device and the biological experiment, along with colleagues in Germany enabled us to “grab” the ribosome and the nascent protein chain and provided sufficient stability and sensitivity to observe the synthesis and folding of single polypeptides in real time at the nanometer scale. This was the first time this was observed world-wide and it is very significant to the research community and in developing more in-depth understandings of protein synthesis, – folding and certain diseases.”</p> <p>Prof Hegner was awarded a Science Foundation Ireland Principal Investigator award in 2016, valued at €1.3m, which will enable him to continue his work in this field.</p> <p>The structure of the ribosome at atomic resolution was only determined in 2000, for which the Nobel Prize in Chemistry was awarded in 2009.</p> </div> </div> </div> </div> <footer> <hr class="cloak" title="Start of the website footer"> <div class="tier-site-footer-nav"> <div class="lay-centered width-max"> <div class="site-footer-nav"> <div id="section-site-index" class="section-site-index"> <h2 class="hide">CRANN Navigation</h2> <div class="lay cols guts-2x-1up"> <div class="width-1o3-1up"> <div class="section-site-index-sitemap"> <h3 class="cloak" id="footer-nav-site-index-sitemap">Sitemap</h3> <nav 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