Early Archean origin of Photosystem II.
Early Archean origin of Photosystem II.
复制标题
光学系统的早期天代渊源II。
DOI:
10.1111/gbi.12322
复制
发表时间:
2019-03
期刊:
影响因子:
3.7
通讯作者:
Larkum AW
中科院分区:
文献类型:
--
作者:
Cardona T;Sánchez-Baracaldo P;Rutherford AW;Larkum AW
Photosystem II is a photochemical reaction center that catalyzes the light‐driven oxidation of water to molecular oxygen. Water oxidation is the distinctive photochemical reaction that permitted the evolution of oxygenic photosynthesis and the eventual rise of eukaryotes. At what point during the history of life an ancestral photosystem evolved the capacity to oxidize water still remains unknown. Here, we study the evolution of the core reaction center proteins of Photosystem II using sequence and structural comparisons in combination with Bayesian relaxed molecular clocks. Our results indicate that a homodimeric photosystem with sufficient oxidizing power to split water had already appeared in the early Archean about a billion years before the most recent common ancestor of all described Cyanobacteria capable of oxygenic photosynthesis, and well before the diversification of some of the known groups of anoxygenic photosynthetic bacteria. Based on a structural and functional rationale, we hypothesize that this early Archean photosystem was capable of water oxidation to oxygen and had already evolved protection mechanisms against the formation of reactive oxygen species. This would place primordial forms of oxygenic photosynthesis at a very early stage in the evolutionary history of life.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
10.1073/pnas.0900885106
发表时间:
2009-07-07
影响因子:
11.1
作者:
Bosak, Tanja;Liang, Biqing;Petroff, Alexander P.
通讯作者:
Petroff, Alexander P.