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Photosystem I: A Paradigm for Understanding Biological Environmental Adaptation Mechanisms
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Version 1
: Received: 4 July 2024 / Approved: 4 July 2024 / Online: 5 July 2024 (02:49:55 CEST)
How to cite: Tian, L.; Chen, J.-H. Photosystem I: A Paradigm for Understanding Biological Environmental Adaptation Mechanisms. Preprints 2024, 2024070465. https://doi.org/10.20944/preprints202407.0465.v1 Tian, L.; Chen, J.-H. Photosystem I: A Paradigm for Understanding Biological Environmental Adaptation Mechanisms. Preprints 2024, 2024070465. https://doi.org/10.20944/preprints202407.0465.v1
Abstract
The process of oxygenic photosynthesis is primarily driven by two multiprotein complexes known as photosystem II (PSII) and photosystem I (PSI). PSII facilitates the light–induced reactions of water–splitting and plastoquinone reduction, while PSI functions as the light–driven plastocyanin-ferredoxin oxidoreductase. In contrast to the highly conserved structure of PSII among all oxygen–evolving photosynthetic organisms, the structures of PSI exhibit remarkable variations, especially for photosynthetic organisms that grow in special environments. In this review, we make a concise overview of the recent investigations of PSI from photosynthetic microorganisms including prokaryotic cyanobacteria and eukaryotic algae from the perspective of structural biology. All known PSI complexes contain a highly conserved heterodimeric core; however, their pigment compositions and peripheral light-harvesting proteins are substantially flexible. This structural plasticity of PSI reveals the dynamic adaptation to environmental changes for photosynthetic organisms.
Keywords
photosystem I; LHCI; cyanobacteria; algae; environmental adaptation
Subject
Biology and Life Sciences, Plant Sciences
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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