ID PSBO_SYNE7 Reviewed; 277 AA.
AC P11472; Q31RJ3;
DT 01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1989, sequence version 1.
DT 27-MAR-2024, entry version 123.
DE RecName: Full=Photosystem II extrinsic protein O;
DE Short=PsbO;
DE AltName: Full=Photosystem II manganese-stabilizing polypeptide;
DE Short=MSP {ECO:0000303|PubMed:3120187};
DE Flags: Precursor;
GN Name=psbO; Synonyms=woxA {ECO:0000303|PubMed:3120187};
GN OrderedLocusNames=Synpcc7942_0294;
OS Synechococcus elongatus (strain ATCC 33912 / PCC 7942 / FACHB-805)
OS (Anacystis nidulans R2).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Synechococcaceae;
OC Synechococcus.
OX NCBI_TaxID=1140;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 33912 / PCC 7942 / FACHB-805;
RX PubMed=3120187; DOI=10.1073/pnas.84.23.8230;
RA Kuwabara T., Reddy K.J., Sherman L.A.;
RT "Nucleotide sequence of the gene from the cyanobacterium Anacystis nidulans
RT R2 encoding the Mn-stabilizing protein involved in photosystem II water
RT oxidation.";
RL Proc. Natl. Acad. Sci. U.S.A. 84:8230-8234(1987).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 33912 / PCC 7942 / FACHB-805;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Schmutz J., Larimer F., Land M.,
RA Kyrpides N., Lykidis A., Golden S., Richardson P.;
RT "Complete sequence of chromosome 1 of Synechococcus elongatus PCC 7942.";
RL Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases.
RN [3]
RP PROTEIN SEQUENCE OF 28-41.
RX PubMed=2689172; DOI=10.1111/j.1432-1033.1989.tb15199.x;
RA Kuwabara T., Nagata R., Shinohara K.;
RT "Expression and processing of cyanobacterial Mn-stabilizing protein in
RT Escherichia coli.";
RL Eur. J. Biochem. 186:227-232(1989).
CC -!- FUNCTION: One of the extrinsic, lumenal subunits of photosystem II
CC (PSII), which stabilize and protect the oxygen-evolving complex. PSII
CC is a light-driven water plastoquinone oxidoreductase, using light
CC energy to abstract electrons from H(2)O, generating a proton gradient
CC subsequently used for ATP formation. Required for dimerization of PSII
CC and for binding of PsbQ to PSII. {ECO:0000250|UniProtKB:P10549}.
CC -!- SUBUNIT: PSII is composed of 1 copy each of membrane proteins PsbA,
CC PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT,
CC PsbX, PsbY, PsbZ, Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ),
CC PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.
CC {ECO:0000250|UniProtKB:P10549}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC {ECO:0000250|UniProtKB:P10549}; Peripheral membrane protein
CC {ECO:0000250|UniProtKB:P10549}; Lumenal side
CC {ECO:0000250|UniProtKB:P10549, ECO:0000305|PubMed:2689172}.
CC -!- SIMILARITY: Belongs to the PsbO family. {ECO:0000305}.
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DR EMBL; J03002; AAA87283.1; -; Genomic_DNA.
DR EMBL; CP000100; ABB56326.1; -; Genomic_DNA.
DR RefSeq; WP_011243530.1; NZ_JACJTX010000002.1.
DR AlphaFoldDB; P11472; -.
DR SMR; P11472; -.
DR STRING; 1140.Synpcc7942_0294; -.
DR PaxDb; 1140-Synpcc7942_0294; -.
DR GeneID; 76399041; -.
DR KEGG; syf:Synpcc7942_0294; -.
DR eggNOG; ENOG502Z7ZP; Bacteria.
DR HOGENOM; CLU_063138_0_0_3; -.
DR OrthoDB; 479833at2; -.
DR BioCyc; MetaCyc:SYNPCC7942_0294-MONOMER; -.
DR BioCyc; SYNEL:SYNPCC7942_0294-MONOMER; -.
DR Proteomes; UP000889800; Chromosome.
DR GO; GO:0009654; C:photosystem II oxygen evolving complex; IEA:InterPro.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0010242; F:oxygen evolving activity; IEA:InterPro.
DR GO; GO:0010207; P:photosystem II assembly; IEA:InterPro.
DR GO; GO:0042549; P:photosystem II stabilization; IEA:InterPro.
DR Gene3D; 3.30.2050.10; photosynthetic oxygen evolving center domain; 1.
DR Gene3D; 2.40.160.30; Photosystem II, cytochrome c-550 precursor; 1.
DR InterPro; IPR011250; OMP/PagP_b-brl.
DR InterPro; IPR002628; PsbO.
DR PANTHER; PTHR34058:SF2; OXYGEN-EVOLVING ENHANCER PROTEIN 1-1, CHLOROPLASTIC; 1.
DR PANTHER; PTHR34058; OXYGEN-EVOLVING ENHANCER PROTEIN 1-2, CHLOROPLASTIC; 1.
DR Pfam; PF01716; MSP; 1.
DR SUPFAM; SSF56925; OMPA-like; 1.
PE 1: Evidence at protein level;
KW Direct protein sequencing; Manganese; Membrane; Photosynthesis;
KW Photosystem II; Reference proteome; Signal; Thylakoid.
FT SIGNAL 1..27
FT /evidence="ECO:0000305|PubMed:2689172"
FT CHAIN 28..277
FT /note="Photosystem II extrinsic protein O"
FT /id="PRO_0000029569"
SQ SEQUENCE 277 AA; 29304 MW; 8FF8C990F8D6556E CRC64;
MRYRAFLAAF LAVCLGVLTA CSSGPTAADL GTLTYDQIKD TGLANKCLSL KESARGTIPL
EAGKKYALTD LCLEPQEFFV KEEPGNKRQK AEFVPGKVLT RYTSSLDQVY GDLALKADGT
VSFTEKGGID FQAITVLLPG GEEVPFLFTV KGLVASTSEP ATSINTSTDL RGGYRVPSYR
TSNFLDPKAR GLTTGYESAV AIPSAGDAED LTKENVKRFV TGQGEISLAV SKVDGATGEV
AGVFTAIQPS DTDMGGKEAV DVKLVGQFYG RIEPADA
//
