ID   PSBH_PARMW              Reviewed;          66 AA.
AC   Q7U9I7;
DT   15-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 109.
DE   RecName: Full=Photosystem II reaction center protein H {ECO:0000255|HAMAP-Rule:MF_00752};
DE            Short=PSII-H {ECO:0000255|HAMAP-Rule:MF_00752};
GN   Name=psbH {ECO:0000255|HAMAP-Rule:MF_00752}; OrderedLocusNames=SYNW0269;
OS   Parasynechococcus marenigrum (strain WH8102).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Parasynechococcus; Parasynechococcus marenigrum.
OX   NCBI_TaxID=84588;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=WH8102;
RX   PubMed=12917641; DOI=10.1038/nature01943;
RA   Palenik B., Brahamsha B., Larimer F.W., Land M.L., Hauser L., Chain P.,
RA   Lamerdin J.E., Regala W., Allen E.E., McCarren J., Paulsen I.T.,
RA   Dufresne A., Partensky F., Webb E.A., Waterbury J.;
RT   "The genome of a motile marine Synechococcus.";
RL   Nature 424:1037-1042(2003).
CC   -!- FUNCTION: One of the components of the core complex of photosystem II
CC       (PSII), required for its stability and/or assembly. PSII is a light-
CC       driven water:plastoquinone oxidoreductase that uses light energy to
CC       abstract electrons from H(2)O, generating O(2) and a proton gradient
CC       subsequently used for ATP formation. It consists of a core antenna
CC       complex that captures photons, and an electron transfer chain that
CC       converts photonic excitation into a charge separation.
CC       {ECO:0000255|HAMAP-Rule:MF_00752}.
CC   -!- SUBUNIT: PSII is composed of 1 copy each of membrane proteins PsbA,
CC       PsbB, PsbC, PsbD, numerous small proteins, at least 3 peripheral
CC       proteins of the oxygen-evolving complex and a large number of
CC       cofactors. It forms dimeric complexes. {ECO:0000255|HAMAP-
CC       Rule:MF_00752}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00752}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00752}.
CC   -!- SIMILARITY: Belongs to the PsbH family. {ECO:0000255|HAMAP-
CC       Rule:MF_00752}.
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DR   EMBL; BX569689; CAE06784.1; -; Genomic_DNA.
DR   RefSeq; WP_006849996.1; NC_005070.1.
DR   AlphaFoldDB; Q7U9I7; -.
DR   SMR; Q7U9I7; -.
DR   STRING; 84588.SYNW0269; -.
DR   EnsemblBacteria; CAE06784; CAE06784; SYNW0269.
DR   KEGG; syw:SYNW0269; -.
DR   eggNOG; ENOG50332MV; Bacteria.
DR   HOGENOM; CLU_190203_0_0_3; -.
DR   OMA; PLMAVFM; -.
DR   OrthoDB; 2064133at2; -.
DR   BioCyc; MetaCyc:TX72_RS01345-MON; -.
DR   Proteomes; UP000001422; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0042301; F:phosphate ion binding; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   GO; GO:0050821; P:protein stabilization; IEA:InterPro.
DR   Gene3D; 1.20.5.880; -; 1.
DR   HAMAP; MF_00752; PSII_PsbH; 1.
DR   InterPro; IPR001056; PSII_PsbH.
DR   InterPro; IPR036863; PSII_PsbH_sf.
DR   PANTHER; PTHR34469; PTHR34469; 1.
DR   Pfam; PF00737; PsbH; 1.
DR   SUPFAM; SSF161025; SSF161025; 1.
PE   3: Inferred from homology;
KW   Membrane; Photosynthesis; Photosystem II; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..66
FT                   /note="Photosystem II reaction center protein H"
FT                   /id="PRO_0000070548"
FT   TRANSMEM        29..49
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00752"
SQ   SEQUENCE   66 AA;  7391 MW;  5D703384DB2A4578 CRC64;
     MAQRTRLGDL LRPLNSEYGK VVPGWGTTPV MGIFMVLFLV FLLVILQLYN KSLILEGINV
     NWNGLG