ID   PSBH_GUITH              Reviewed;          67 AA.
AC   O78514;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 90.
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};
OS   Guillardia theta (Cryptophyte) (Cryptomonas phi).
OG   Plastid; Chloroplast.
OC   Eukaryota; Cryptophyceae; Pyrenomonadales; Geminigeraceae; Guillardia.
OX   NCBI_TaxID=55529;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=9929392; DOI=10.1007/pl00006462;
RA   Douglas S.E., Penny S.L.;
RT   "The plastid genome of the cryptophyte alga, Guillardia theta: complete
RT   sequence and conserved synteny groups confirm its common ancestry with red
RT   algae.";
RL   J. Mol. Evol. 48:236-244(1999).
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: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_00752}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_00752}.
CC   -!- SIMILARITY: Belongs to the PsbH family. {ECO:0000255|HAMAP-
CC       Rule:MF_00752}.
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DR   EMBL; AF041468; AAC35736.1; -; Genomic_DNA.
DR   RefSeq; NP_050802.1; NC_000926.1.
DR   AlphaFoldDB; O78514; -.
DR   SMR; O78514; -.
DR   GeneID; 857110; -.
DR   HOGENOM; CLU_190203_0_0_1; -.
DR   OMA; PLMAVFM; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
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: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   Chloroplast; Membrane; Photosynthesis; Photosystem II; Plastid; Thylakoid;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..67
FT                   /note="Photosystem II reaction center protein H"
FT                   /id="PRO_0000070510"
FT   TRANSMEM        29..49
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00752"
SQ   SEQUENCE   67 AA;  7501 MW;  A524F1EC218DCDCC CRC64;
     MALRTRLGEL LRPLNSEYGK VAPGWGTTPA MGFVMLLFFL FLLIILQIYN SSLILENVDV
     DWASLGN