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Decoding Life’s Origins with Lost Biochemical Clues - tec5USA

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class="breadcrumbs__link --active">Decoding Life’s Origins with Lost Biochemical Clues</span> </nav> <figure class="image-wrap"> <img width="670" height="375" src="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20670%20375'%3E%3C/svg%3E" class="image wp-post-image" alt="two planets connected" decoding="async" fetchpriority="high" data-lazy-srcset="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-300x168.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-768x430.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-250x140.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-150x84.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-580x325.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-246x138.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-440x246.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-179x100.jpg 179w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1.jpg 964w" data-lazy-sizes="(max-width: 670px) 100vw, 670px" data-lazy-src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg" /><noscript><img width="670" height="375" src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg" class="image wp-post-image" alt="two planets connected" decoding="async" fetchpriority="high" srcset="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-300x168.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-768x430.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-250x140.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-150x84.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-580x325.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-246x138.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-440x246.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-179x100.jpg 179w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1.jpg 964w" sizes="(max-width: 670px) 100vw, 670px" /></noscript> </figure> </div> <div class="heading-wrap"> <p class="sup-heading text-white">Articles</p> <h1 class="text-white">Decoding Life’s Origins with Lost Biochemical Clues</h1> </div> </div> </section> <div class="container"> <div class="single-post__wrap"> <aside class="sidebar"> <!-- Author Info --> <div class='author'> <span class='text-small'>05.30.24 </span> <span class=""><img alt='' src="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2096%2096'%3E%3C/svg%3E" data-lazy-srcset='https://secure.gravatar.com/avatar/20d5675875afdd2a74fd4b4de73f38e0?s=192&#038;d=mm&#038;r=g 2x' class='avatar avatar-96 photo' height='96' width='96' decoding='async' data-lazy-src="https://secure.gravatar.com/avatar/20d5675875afdd2a74fd4b4de73f38e0?s=96&#038;d=mm&#038;r=g"/><noscript><img alt='' src='https://secure.gravatar.com/avatar/20d5675875afdd2a74fd4b4de73f38e0?s=96&#038;d=mm&#038;r=g' srcset='https://secure.gravatar.com/avatar/20d5675875afdd2a74fd4b4de73f38e0?s=192&#038;d=mm&#038;r=g 2x' class='avatar avatar-96 photo' height='96' width='96' decoding='async'/></noscript></span> <span class='text-small'> </span> </div> <div class="social-widget-sticky"> <!-- Dark Mode --> <div 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https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-300x168.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-768x430.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-250x140.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-150x84.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-580x325.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-246x138.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-440x246.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-179x100.jpg 179w" data-lazy-sizes="(max-width: 964px) 100vw, 964px" data-lazy-src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1.jpg" /><noscript><img decoding="async" class="wp-image-3836 size-full" src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1.jpg" alt="two planets connected" width="964" height="540" srcset="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1.jpg 964w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-300x168.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-768x430.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-250x140.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-150x84.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-580x325.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-670x375.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-246x138.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-440x246.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-Picture-1-179x100.jpg 179w" sizes="(max-width: 964px) 100vw, 964px" /></noscript><figcaption id="caption-attachment-3836" class="wp-caption-text">Metabolism is the “beating heart of the cell”. New research from ELSI retraces the history of metabolism from the primordial Earth to the modern day (left to right). The history of compound discovery over time (white line) is cyclic, almost resembling an EKG. Credit: NASA’s Goddard Space Flight Center/Francis Reddy/NASA/ESA</figcaption></figure> <p>&nbsp;</p> <p><strong>A new study demonstrates that just a handful of “forgotten” biochemical reactions are needed to transform simple geochemical compounds into the complex molecules of life.</strong></p> <p>The origin of life on Earth has long been a mystery that has eluded scientists. A key question is how much of the history of life on Earth is lost to time. It is quite common for a single species to “phase out” using a biochemical reaction, and if this happens across enough species, such reactions could effectively be “forgotten” by life on Earth. But if the history of biochemistry is rife with forgotten reactions, would there be any way to tell?</p> <p>This question inspired researchers from the Earth-Life Science Institute (ELSI) at the Tokyo Institute of Technology, and the California Institute of Technology (CalTech) in the USA. They reasoned that forgotten chemistry would appear as discontinuities or “breaks” in the path that chemistry takes from simple geochemical molecules to complex biological molecules.</p> <h2>Evolution of Early Earth’s Biochemistry</h2> <p>The early Earth was rich in simple compounds such as hydrogen sulfide, ammonia, and carbon dioxide – molecules not usually associated with sustaining life. But, billions of years ago, early life relied on these simple molecules as a raw material source. As life evolved, biochemical processes gradually transformed these precursors into compounds still found today. These processes represent the earliest metabolic pathways.</p> <figure id="attachment_3837" aria-describedby="caption-attachment-3837" style="width: 992px" class="wp-caption aligncenter"><img decoding="async" class="wp-image-3837 size-full" src="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20992%20362'%3E%3C/svg%3E" alt="model A vs model B" width="992" height="362" data-lazy-srcset="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic.jpg 992w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-300x109.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-768x280.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-250x91.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-150x55.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-580x212.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-670x244.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-246x90.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-440x161.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-200x73.jpg 200w" data-lazy-sizes="(max-width: 992px) 100vw, 992px" data-lazy-src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic.jpg" /><noscript><img decoding="async" class="wp-image-3837 size-full" src="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic.jpg" alt="model A vs model B" width="992" height="362" srcset="https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic.jpg 992w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-300x109.jpg 300w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-768x280.jpg 768w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-250x91.jpg 250w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-150x55.jpg 150w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-580x212.jpg 580w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-670x244.jpg 670w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-246x90.jpg 246w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-440x161.jpg 440w, https://www.tec5usa.com/wp-content/uploads/2024/05/SciTechDaily-A-B-graphic-200x73.jpg 200w" sizes="(max-width: 992px) 100vw, 992px" /></noscript><figcaption id="caption-attachment-3837" class="wp-caption-text">To construct a model of the evolutionary history of metabolism at the biosphere scale, the research team compiled a database of 12,262 biochemical reactions from the Kyoto Encyclopedia of Genes and Genomes (KEGG) database. Credit: Goldford, J.E., Nat Ecol Evol (2024)</figcaption></figure> <h2></h2> <h2>Research Methodology on Biochemical Evolution</h2> <p>In order to model the history of biochemistry, ELSI researchers – Specially Appointed Associate Professor Harrison B. Smith, Specially Appointed Associate Professor Liam M. Longo and Associate Professor Shawn Erin McGlynn, in collaboration with Research Scientist Joshua Goldford from CalTech – needed an inventory of all known biochemical reactions, to understand what types of chemistry life is able to perform.</p> <p>They turned to the Kyoto Encyclopedia of Genes and Genomes database, which has cataloged more than 12,000 biochemical reactions. With reactions in hand, they began to model the stepwise development of metabolism.</p> <h2>Challenges in Modeling Metabolic Evolution</h2> <p>Previous attempts to model the evolution of metabolism in this way had consistently failed to produce the most widespread, complex molecules used by contemporary life. However, the reason was not entirely clear. Just as before, when the researchers ran their model, they found that only a few compounds could be produced.</p> <p>One way to circumvent this problem is to nudge the stalled chemistry by manually providing modern compounds. The researchers opted for a different approach: They wanted to determine how many reactions were missing. And their hunt led them back to one of the most important molecules in all of biochemistry: adenosine triphosphate (ATP).</p> <h2>The ATP Bottleneck and Its Resolution</h2> <p>ATP is the cell’s energy currency because it can be used to drive reactions – like building proteins – that would otherwise not occur in water. ATP, however, has a unique property: The reactions that form ATP themselves require ATP. In other words, unless ATP is already present, there is no other way for today’s life to make ATP. This cyclic dependency was the reason why the model was stopping.</p> <p>How could this “ATP bottleneck” be resolved? As it turns out, the reactive portion of ATP is remarkably similar to the inorganic compound polyphosphate. By allowing ATP-generating reactions to use polyphosphate instead of ATP – by modifying just eight reactions in total – nearly all of contemporary core metabolism could be achieved. The</p> <p>researchers could then estimate the relative ages of all common metabolites and ask pointed questions about the history of metabolic pathways.</p> <h2>Metabolic Pathways: Linear vs. Mosaic</h2> <p>One such question is whether biological pathways were built up in a linear fashion – in which one reaction after another is added in a sequential fashion – or if the reactions of pathways emerged as a mosaic, in which reactions of vastly different ages are joined together to form something new. The researchers were able to quantify this, finding that both types of pathways are nearly equally common across all of metabolism.</p> <h2>Conclusion and Implications</h2> <p>But returning to the question that inspired the study – how much biochemistry is lost to time? “We might never know exactly, but our research yielded an important piece of evidence: only eight new reactions, all reminiscent of common biochemical reactions, are needed to bridge geochemistry and biochemistry,” says Smith.</p> <p>“This does not prove that the space of missing biochemistry is small, but it does show that even reactions that have gone extinct can be rediscovered from clues left behind in modern biochemistry,” concludes Smith.</p> <p>Reference: “Primitive purine biosynthesis connects ancient geochemistry to modern metabolism” by Joshua E. Goldford, Harrison B. Smith, Liam M. Longo, Boswell A. Wing and Shawn Erin McGlynn, 22 March 2024, Nature Ecology &amp; Evolution.</p> <p>By TOKYO INSTITUTE OF TECHNOLOGY MAY 28, 202</p> <!-- Tags --> <div class="single-post__tags"> <p class='text-blue text-bold'>Categories (tags):</p><div class='single-post__tags-wrap'> <a href='https://www.tec5usa.com/category/articles/' class='single-post__tag'>Articles</a> </div> </div> </article> </div> </div> </div> <section class="blog"> <h2 class="section-title text-center">Other (Articles) Articles</h2> <div class="blog__articles container wrapp" style="display: flex;"> <a href='https://www.tec5usa.com/revealing-the-invisible-living-cells-can-be-seen-with-infrared-light/' class='box --vertical f-col-4'> <div class="box__head"> <figure class='image-wrap'> <img data-src='https://www.tec5usa.com/wp-content/uploads/2024/09/Infrared-Light-Blog-Picture-1-470x350.jpg' width='622' height='249' alt='Revealing the Invisible: Living Cells Can Be Seen With Infrared Lightfeatured image' class='lazy image'> 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