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Article

Posttranslational generation of carboxylate ligands from aliphatic side chains in the photosynthetic oxygen-evolving complex.

Proceedings of the National Academy of Sciences of the United States of America - 28 Jul 2026

Mizue Hatsune, Suzuki Takehiro, Matsubara Takumi, Kitajima-Ihara Tomomi, Hirano Minako, Shimada Yuichiro, Kato Yuki, Dohmae Naoshi, Noguchi Takumi

Abstract excerpt

Photosynthetic oxygen evolution is catalyzed by the Mn4CaO5 cluster within the oxygen-evolving complex (OEC) of photosystem II (PSII). Although oxygenic photosynthesis likely arose before the Great Oxidation Event (~2.4 billion years ago), how the OEC emerged in ancestral PSII remains unresolved. We previously showed that cyanobacterial mutants in which Asp or Glu ligands of the Mn4CaO5 cluster were replaced with...

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Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

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Identifiers

PMID: 42475573
DOI: 10.1073/pnas.2610028123
PMCID: PMC13416080

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