NCBI Accession #
NP_190651.1
NCBI GenBank Nucleotide #
NM_114942.3
NCBI Official Full Name
photosystem II subunit O-2
NCBI Official Symbol
PSBO2
NCBI Official Synonym Symbols
MSP-2; OEC33; OXYGEN EVOLVING COMPLEX SUBUNIT 33 KDA; photosystem II subunit O-2; PHOTOSYSTEM II SUBUNIT O-2; PSBO; PSBO-2
NCBI Protein Information
photosystem II subunit O-2
NCBI Summary
Encodes a protein which is an extrinsic subunit of photosystem II and which has been proposed to play a central role in stabilization of the catalytic manganese cluster. In Arabidopsis thaliana the PsbO proteins are encoded by two genes: psbO1 and psbO2. PsbO2 is the minor isoform in the wild-type. Mutants defective in this gene have been shown to be affected in the dephosphorylation of the D1 protein of PSII.
UniProt Synonym Gene Names
OEE1; MSP-2
UniProt Protein Name
Oxygen-evolving enhancer protein 1-2, chloroplastic
UniProt Synonym Protein Names
33 kDa subunit of oxygen evolving system of photosystem II; 33 kDa thylakoid membrane protein; Manganese-stabilizing protein 2; MSP-2; OEC 33 kDa subunit
UniProt Primary Accession #
Q9S841
UniProt Related Accession #
Q9S841
UniProt Comments
Stabilizes the manganese cluster which is the primary site of water splitting. Regulates dephosphorylation and turnover of the PSII reaction center D1 protein.