Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1702729114 |
Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean | |
Garcia, Amanda K.1,2; Schopf, J. William1,2,3,4; Yokobori, Shin-ichi5; Akanuma, Satoshi6; Yamagishi, Akihiko5 | |
2017-05-02 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:18页码:4619-4624 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Japan |
英文摘要 | Paleotemperatures inferred from the isotopic compositions (delta O-18 and delta Si-30) of marine cherts suggest that Earth's oceans cooled from 70 +/- 15 degrees C in the Archean to the present similar to 15 degrees C. This interpretation, however, has been subject to question due to uncertainties regarding oceanic isotopic compositions, diagenetic or metamorphic resetting of the isotopic record, and depositional environments. Analyses of the thermostability of reconstructed ancestral enzymes provide an independent method by which to assess the temperature history inferred from the isotopic evidence. Although previous studies have demonstrated extreme thermostability in reconstructed archaeal and bacterial proteins compatible with a hot early Earth, taxa investigated may have inhabited local thermal environments that differed significantly from average surface conditions. We here present thermostability measurements of reconstructed ancestral enzymatically active nucleoside diphosphate kinases (NDKs) derived from light-requiring prokaryotic and eukaryotic phototrophs having widely separated fossil-based divergence ages. The ancestral environmental temperatures thereby determined for these photic-zone organisms-shown in modern taxa to correlate strongly with NDK thermostability-are inferred to reflect ancient surface-environment paleotemperatures. Our results suggest that Earth's surface temperature decreased over geological time from similar to 65-80 degrees C in the Archean, a finding consistent both with previous isotope-based and protein reconstruction-based interpretations. Interdisciplinary studies such as those reported here integrating genomic, geologic, and paleontologic data hold promise for providing new insight into the coevolution of life and environment over Earth history. |
英文关键词 | ancestral sequence reconstruction enzyme thermostability nucleoside diphosphate kinase phototroph Precambrian |
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:000400358000034 |
WOS关键词 | OXYGEN-ISOTOPE GEOCHEMISTRY ; PHYLOGENETIC ANALYSIS ; BILLION YEARS ; SOUTH-AFRICA ; LIFE ; CHERTS ; TEMPERATURES ; MICROFOSSILS ; ROBUSTNESS ; SUPERGROUP |
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/204698 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Los Angeles, Ctr Study Evolut & Origin Life, Los Angeles, CA 90095 USA; 2.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA; 3.Univ Calif Los Angeles, Mol Biol Inst, Los Angeles, CA 90095 USA; 4.Univ Wisconsin, Astrobiol Res Consortium, Madison, WI 53706 USA; 5.Tokyo Univ Pharm & Life Sci, Dept Appl Life Sci, 1432-1 Horinouchi, Hachioji, Tokyo 1920392, Japan; 6.Waseda Univ, Fac Human Sci, 2-579-15 Mikajima, Tokorozawa, Saitama 3591192, Japan |
推荐引用方式 GB/T 7714 | Garcia, Amanda K.,Schopf, J. William,Yokobori, Shin-ichi,et al. Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(18):4619-4624. |
APA | Garcia, Amanda K.,Schopf, J. William,Yokobori, Shin-ichi,Akanuma, Satoshi,&Yamagishi, Akihiko.(2017).Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(18),4619-4624. |
MLA | Garcia, Amanda K.,et al."Reconstructed ancestral enzymes suggest long-term cooling of Earth's photic zone since the Archean".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.18(2017):4619-4624. |
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