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PSBM_THEVL
ID   PSBM_THEVL              Reviewed;          36 AA.
AC   P12312; D0VWR9;
DT   01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT   29-MAY-2013, sequence version 2.
DT   25-MAY-2022, entry version 86.
DE   RecName: Full=Photosystem II reaction center protein M {ECO:0000255|HAMAP-Rule:MF_00438};
DE            Short=PSII-M {ECO:0000255|HAMAP-Rule:MF_00438};
GN   Name=psbM {ECO:0000255|HAMAP-Rule:MF_00438, ECO:0000303|PubMed:2503398};
OS   Thermostichus vulcanus (Synechococcus vulcanus).
OC   Bacteria; Cyanobacteria; Thermostichales; Thermostichaceae; Thermostichus.
OX   NCBI_TaxID=32053;
RN   [1]
RP   PROTEIN SEQUENCE OF 1-19.
RX   PubMed=2503398; DOI=10.1016/0014-5793(89)80954-8;
RA   Ikeuchi M., Koike H., Inoue Y.;
RT   "N-terminal sequencing of low-molecular-mass components in cyanobacterial
RT   photosystem II core complex. Two components correspond to unidentified open
RT   reading frames of plant chloroplast DNA.";
RL   FEBS Lett. 253:178-182(1989).
RN   [2]
RP   PROTEIN SEQUENCE OF 1-15, COMPOSITION OF PHOTOSYSTEM II, AND SUBUNIT.
RX   PubMed=12461137; DOI=10.1093/pcp/pcf168;
RA   Kashino Y., Koike H., Yoshio M., Egashira H., Ikeuchi M., Pakrasi H.B.,
RA   Satoh K.;
RT   "Low-molecular-mass polypeptide components of a photosystem II preparation
RT   from the thermophilic cyanobacterium Thermosynechococcus vulcanus.";
RL   Plant Cell Physiol. 43:1366-1373(2002).
RN   [3]
RP   X-RAY CRYSTALLOGRAPHY (3.70 ANGSTROMS) IN PHOTOSYSTEM II, FUNCTION,
RP   COFACTOR, SUBUNIT, AND SUBCELLULAR LOCATION.
RX   PubMed=19433803; DOI=10.1073/pnas.0812797106;
RA   Kawakami K., Umena Y., Kamiya N., Shen J.R.;
RT   "Location of chloride and its possible functions in oxygen-evolving
RT   photosystem II revealed by X-ray crystallography.";
RL   Proc. Natl. Acad. Sci. U.S.A. 106:8567-8572(2009).
RN   [4]
RP   X-RAY CRYSTALLOGRAPHY (1.90 ANGSTROMS) IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, SUBCELLULAR LOCATION, AND TOPOLOGY.
RX   PubMed=21499260; DOI=10.1038/nature09913;
RA   Umena Y., Kawakami K., Shen J.R., Kamiya N.;
RT   "Crystal structure of oxygen-evolving photosystem II at a resolution of 1.9
RT   A.";
RL   Nature 473:55-60(2011).
RN   [5]
RP   X-RAY CRYSTALLOGRAPHY (2.1 ANGSTROMS) OF 1-34 IN PHOTOSYSTEM II, FUNCTION,
RP   COFACTOR, SUBUNIT, SUBCELLULAR LOCATION, AND N-F-MET.
RX   PubMed=23426624; DOI=10.1073/pnas.1219922110;
RA   Koua F.H., Umena Y., Kawakami K., Shen J.R.;
RT   "Structure of Sr-substituted photosystem II at 2.1 A resolution and its
RT   implications in the mechanism of water oxidation.";
RL   Proc. Natl. Acad. Sci. U.S.A. 110:3889-3894(2013).
CC   -!- FUNCTION: One of the components of the core complex of photosystem II
CC       (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that
CC       uses light energy to abstract electrons from H(2)O, generating O(2) and
CC       a proton gradient subsequently used for ATP formation. It consists of a
CC       core antenna complex that captures photons, and an electron transfer
CC       chain that converts photonic excitation into a charge separation
CC       (PubMed:19433803, PubMed:23426624). This subunit is found at the
CC       monomer-monomer interface. Probably involved in dimerization of PSII;
CC       at the monomer-monomer interface the only protein-protein contacts
CC       observed are between the 2 PsbM subunits. Lipids, chlorophylls and
CC       carotenoids contribute strongly to PSII dimerization.
CC       {ECO:0000250|UniProtKB:Q8DHA7, ECO:0000255|HAMAP-Rule:MF_00438,
CC       ECO:0000269|PubMed:19433803, ECO:0000269|PubMed:23426624}.
CC   -!- COFACTOR:
CC       Note=PSII binds multiple chlorophylls, carotenoids and specific lipids.
CC       {ECO:0000269|PubMed:19433803, ECO:0000269|PubMed:21499260,
CC       ECO:0000269|PubMed:23426624};
CC   -!- SUBUNIT: Cyanobacterial PSII is composed of 1 copy each of membrane
CC       proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK,
CC       PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral
CC       proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms
CC       dimeric complexes. {ECO:0000255|HAMAP-Rule:MF_00438,
CC       ECO:0000269|PubMed:12461137, ECO:0000269|PubMed:19433803,
CC       ECO:0000269|PubMed:21499260, ECO:0000269|PubMed:23426624}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00438, ECO:0000269|PubMed:19433803,
CC       ECO:0000269|PubMed:21499260, ECO:0000269|PubMed:23426624}; Single-pass
CC       membrane protein {ECO:0000255|HAMAP-Rule:MF_00438,
CC       ECO:0000269|PubMed:19433803, ECO:0000269|PubMed:21499260,
CC       ECO:0000269|PubMed:23426624}.
CC   -!- SIMILARITY: Belongs to the PsbM family. {ECO:0000255|HAMAP-
CC       Rule:MF_00438}.
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DR   PIR; S05215; S05215.
DR   PDB; 3A0B; X-ray; 3.70 A; M/m=1-36.
DR   PDB; 3A0H; X-ray; 4.00 A; M/m=1-36.
DR   PDB; 3WU2; X-ray; 1.90 A; M/m=1-36.
DR   PDB; 4IL6; X-ray; 2.10 A; M/m=1-34.
DR   PDB; 4UB6; X-ray; 1.95 A; M/m=1-36.
DR   PDB; 4UB8; X-ray; 1.95 A; M/m=1-36.
DR   PDB; 5B5E; X-ray; 1.87 A; M/m=1-36.
DR   PDB; 5B66; X-ray; 1.85 A; M/m=1-36.
DR   PDB; 5GTH; X-ray; 2.50 A; M/m=1-36.
DR   PDB; 5GTI; X-ray; 2.50 A; M/m=1-36.
DR   PDB; 5V2C; X-ray; 1.90 A; M/m=1-36.
DR   PDB; 5WS5; X-ray; 2.35 A; M/m=1-36.
DR   PDB; 5WS6; X-ray; 2.35 A; M/m=1-36.
DR   PDB; 6JLJ; X-ray; 2.15 A; M/m=1-36.
DR   PDB; 6JLK; X-ray; 2.15 A; M/m=1-36.
DR   PDB; 6JLL; X-ray; 2.15 A; M/m=1-36.
DR   PDB; 6JLM; X-ray; 2.35 A; M/m=1-36.
DR   PDB; 6JLN; X-ray; 2.40 A; M/m=1-36.
DR   PDB; 6JLO; X-ray; 2.40 A; M/m=1-36.
DR   PDB; 6JLP; X-ray; 2.50 A; M/m=1-36.
DR   PDB; 7CJI; X-ray; 2.35 A; M/m=1-36.
DR   PDB; 7CJJ; X-ray; 2.40 A; M/m=1-36.
DR   PDB; 7COU; X-ray; 2.25 A; M/m=1-36.
DR   PDB; 7CZL; EM; 3.78 A; M/m=1-33.
DR   PDB; 7D1T; EM; 1.95 A; M/m=1-34.
DR   PDB; 7D1U; EM; 2.08 A; M/m=1-34.
DR   PDB; 7DXA; EM; 3.14 A; m=1-36.
DR   PDB; 7DXH; EM; 3.14 A; m=1-36.
DR   PDB; 7EDA; EM; 2.78 A; M=3-32.
DR   PDBsum; 3A0B; -.
DR   PDBsum; 3A0H; -.
DR   PDBsum; 3WU2; -.
DR   PDBsum; 4IL6; -.
DR   PDBsum; 4UB6; -.
DR   PDBsum; 4UB8; -.
DR   PDBsum; 5B5E; -.
DR   PDBsum; 5B66; -.
DR   PDBsum; 5GTH; -.
DR   PDBsum; 5GTI; -.
DR   PDBsum; 5V2C; -.
DR   PDBsum; 5WS5; -.
DR   PDBsum; 5WS6; -.
DR   PDBsum; 6JLJ; -.
DR   PDBsum; 6JLK; -.
DR   PDBsum; 6JLL; -.
DR   PDBsum; 6JLM; -.
DR   PDBsum; 6JLN; -.
DR   PDBsum; 6JLO; -.
DR   PDBsum; 6JLP; -.
DR   PDBsum; 7CJI; -.
DR   PDBsum; 7CJJ; -.
DR   PDBsum; 7COU; -.
DR   PDBsum; 7CZL; -.
DR   PDBsum; 7D1T; -.
DR   PDBsum; 7D1U; -.
DR   PDBsum; 7DXA; -.
DR   PDBsum; 7DXH; -.
DR   PDBsum; 7EDA; -.
DR   AlphaFoldDB; P12312; -.
DR   SMR; P12312; -.
DR   DIP; DIP-48868N; -.
DR   IntAct; P12312; 1.
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:0019684; P:photosynthesis, light reaction; IEA:InterPro.
DR   HAMAP; MF_00438; PSII_PsbM; 1.
DR   InterPro; IPR007826; PSII_PsbM.
DR   InterPro; IPR037269; PSII_PsbM_sf.
DR   Pfam; PF05151; PsbM; 1.
DR   SUPFAM; SSF161033; SSF161033; 1.
DR   TIGRFAMs; TIGR03038; PS_II_psbM; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem II; Reaction center; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..36
FT                   /note="Photosystem II reaction center protein M"
FT                   /id="PRO_0000217588"
FT   TOPO_DOM        1..11
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000269|PubMed:21499260"
FT   TRANSMEM        12..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000269|PubMed:21499260"
FT   TOPO_DOM        28..36
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:21499260"
FT   MOD_RES         1
FT                   /note="Blocked amino end (Met)"
FT                   /evidence="ECO:0000269|PubMed:2503398"
FT   CONFLICT        8
FT                   /note="F -> L (in Ref. 2; AA sequence)"
FT                   /evidence="ECO:0000305"
FT   HELIX           7..30
FT                   /evidence="ECO:0007829|PDB:5B66"
SQ   SEQUENCE   36 AA;  4015 MW;  C7CE19054D10A0D4 CRC64;
     MEVNQLGFIA TALFVLVPSV FLIILYVQTE SQQKSS
 
 
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