Photosystem II extrinsic protein O

UniProtKB accession:  P0A431

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UniProtKB description:  One of the extrinsic, lumenal subunits of photosystem II (PSII), which stabilize and protect the oxygen-evolving complex. PSII is a light-driven water plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating a proton gradient subsequently used for ATP formation (PubMed:20558739, PubMed:25006873). Required for dimerization of PSII and for binding of PsbQ to PSII (By similarity).