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May 8, 2026Acta Crystallographica Section D Structural BiologyOpen Access

Comment on Photosystem II: light-dependent oscillation of ligand composition at its active site : existence of O6 in S ₃ -state photosystem II revealed by omit maps

Hongjie Li Michihiro Suga Jian-Ren Shen

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Key Points

This commentary discusses the implications of ligand composition changes in Photosystem II.
Commentary analysis of ligand composition in Photosystem II.
Evaluation of omit maps related to the active site and S3-state discovery.
Identified the presence of O6 in the S3-state of Photosystem II.
Questioned existing interpretations regarding ligand dynamics in Photosystem II.

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Implication

Comment highlights light-dependent changes in ligand composition of Photosystem II, suggesting complexities in the S3-state.

Abstract

state, and are inconsistent with the interpretation proposed by Wang.

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Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a03cb781c527af8f1ecf17c https://doi.org/10.1107/s2059798326003621

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1Theoretical Evaluation of Structural Models of the S<sub>2</sub> State in the Oxygen Evolving Complex of Photosystem II: Protonation States and Magnetic InteractionsOriginal Research · 2011 · 289 citations
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3The S2 State of the Oxygen‐Evolving Complex of Photosystem II Explored by QM/MM Dynamics: Spin Surfaces and Metastable States Suggest a Reaction Path Towards the S3 StateOriginal Research · 2013 · 165 citations
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