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DOI | 10.1073/pnas.1710339114 |
Origin of the RNA world: The fate of nucleobases in warm little ponds | |
Pearce, Ben K. D.1,2; Pudritz, Ralph E.1,2,3,4; Semenov, Dmitry A.3; Henning, Thomas K.3 | |
2017-10-24 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:43页码:11327-11332 |
文章类型 | Editorial Material |
语种 | 英语 |
国家 | Canada; Germany |
英文摘要 | Before the origin of simple cellular life, the building blocks of RNA (nucleotides) had to form and polymerize in favorable environments on early Earth. At this time, meteorites and interplanetary dust particles delivered organics such as nucleobases (the characteristic molecules of nucleotides) to warm little ponds whose wet-dry cycles promoted rapid polymerization. We build a comprehensive numerical model for the evolution of nucleobases in warm little ponds leading to the emergence of the first nucleotides and RNA. We couple Earth's early evolution with complex prebiotic chemistry in these environments. We find that RNA polymers must have emerged very quickly after the deposition of meteorites (less than a few years). Their constituent nucleobases were primarily meteoritic in origin and not from interplanetary dust particles. Ponds appeared as continents rose out of the early global ocean, but this increasing availability of "targets" for meteorites was offset by declining meteorite bombardment rates. Moreover, the rapid losses of nucleobases to pond seepage during wet periods, and to UV photodissociation during dry periods, mean that the synthesis of nucleotides and their polymerization into RNA occurred in just one to a few wet-dry cycles. Under these conditions, RNA polymers likely appeared before 4.17 billion years ago. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413520700044 |
WOS关键词 | INNER SOLAR-SYSTEM ; MAGNETIC-SUSCEPTIBILITY ; CARBONACEOUS CHONDRITES ; DIFFUSION-COEFFICIENTS ; ORGANIC-MOLECULES ; SIZE DISTRIBUTION ; EARLY EARTH ; LIFE ; METEORITES ; EVOLUTION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204806 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.McMaster Univ, Origins Inst, Hamilton, ON L8S 4M1, Canada; 2.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada; 3.Max Planck Inst Astron, Planet & Star Format Dept, D-69117 Heidelberg, Germany; 4.Ctr Astron Heidelberg, Inst Theoret Astrophys, D-69120 Heidelberg, Germany |
推荐引用方式 GB/T 7714 | Pearce, Ben K. D.,Pudritz, Ralph E.,Semenov, Dmitry A.,et al. Origin of the RNA world: The fate of nucleobases in warm little ponds[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(43):11327-11332. |
APA | Pearce, Ben K. D.,Pudritz, Ralph E.,Semenov, Dmitry A.,&Henning, Thomas K..(2017).Origin of the RNA world: The fate of nucleobases in warm little ponds.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(43),11327-11332. |
MLA | Pearce, Ben K. D.,et al."Origin of the RNA world: The fate of nucleobases in warm little ponds".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.43(2017):11327-11332. |
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