ID   PSBM_SYNR3              Reviewed;          34 AA.
AC   A5GR14;
DT   18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT   18-MAR-2008, sequence version 2.
DT   25-MAY-2022, entry version 70.
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};
GN   OrderedLocusNames=SynRCC307_0420;
OS   Synechococcus sp. (strain RCC307).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=316278;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RCC307;
RG   Genoscope;
RL   Submitted (MAY-2006) to the EMBL/GenBank/DDBJ databases.
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. This
CC       subunit is found at the monomer-monomer interface. {ECO:0000255|HAMAP-
CC       Rule:MF_00438}.
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   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00438}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00438}.
CC   -!- SIMILARITY: Belongs to the PsbM family. {ECO:0000255|HAMAP-
CC       Rule:MF_00438}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAK27323.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CT978603; CAK27323.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_043736515.1; NC_009482.1.
DR   AlphaFoldDB; A5GR14; -.
DR   SMR; A5GR14; -.
DR   STRING; 316278.SynRCC307_0420; -.
DR   EnsemblBacteria; CAK27323; CAK27323; SynRCC307_0420.
DR   KEGG; syr:SynRCC307_0420; -.
DR   eggNOG; ENOG50339PB; Bacteria.
DR   HOGENOM; CLU_215415_0_0_3; -.
DR   OrthoDB; 2087962at2; -.
DR   Proteomes; UP000001115; 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: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   3: Inferred from homology;
KW   Membrane; Photosynthesis; Photosystem II; Reaction center;
KW   Reference proteome; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..34
FT                   /note="Photosystem II reaction center protein M"
FT                   /id="PRO_0000325714"
FT   TRANSMEM        7..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00438"
SQ   SEQUENCE   34 AA;  3813 MW;  AB931E2FAF90855A CRC64;
     METNDLGFVA TLLFVLVPAI FLIILYIQTN SREG