ID   PSBM_ANTAG              Reviewed;          34 AA.
AC   Q85BK0;
DT   02-FEB-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   25-MAY-2022, entry version 62.
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};
OS   Anthoceros angustus (Hornwort) (Anthoceros formosae).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Anthocerotophyta;
OC   Anthocerotopsida; Anthocerotidae; Anthocerotales; Anthocerotaceae;
OC   Anthoceros.
OX   NCBI_TaxID=48387;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], AND RNA EDITING.
RX   PubMed=12527781; DOI=10.1093/nar/gkg155;
RA   Kugita M., Kaneko A., Yamamoto Y., Takeya Y., Matsumoto T., Yoshinaga K.;
RT   "The complete nucleotide sequence of the hornwort (Anthoceros formosae)
RT   chloroplast genome: insight into the earliest land plants.";
RL   Nucleic Acids Res. 31:716-721(2003).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [MRNA], AND RNA EDITING.
RC   TISSUE=Thallus;
RX   PubMed=12711687; DOI=10.1093/nar/gkg327;
RA   Kugita M., Yamamoto Y., Fujikawa T., Matsumoto T., Yoshinaga K.;
RT   "RNA editing in hornwort chloroplasts makes more than half the genes
RT   functional.";
RL   Nucleic Acids Res. 31:2417-2423(2003).
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: 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, Ycf12, at least 3 peripheral proteins of the oxygen-
CC       evolving complex and a large number of cofactors. It forms dimeric
CC       complexes. {ECO:0000255|HAMAP-Rule:MF_00438}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_00438}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_00438}.
CC   -!- RNA EDITING: Modified_positions=23 {ECO:0000269|PubMed:12527781,
CC       ECO:0000269|PubMed:12711687}, 25 {ECO:0000269|PubMed:12527781,
CC       ECO:0000269|PubMed:12711687};
CC   -!- SIMILARITY: Belongs to the PsbM family. {ECO:0000255|HAMAP-
CC       Rule:MF_00438}.
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DR   EMBL; AB086179; BAC55324.1; -; Genomic_DNA.
DR   EMBL; AB087416; BAC55414.1; -; mRNA.
DR   RefSeq; NP_777388.1; NC_004543.1.
DR   AlphaFoldDB; Q85BK0; -.
DR   SMR; Q85BK0; -.
DR   GeneID; 2553407; -.
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: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   PANTHER; PTHR35774; PTHR35774; 1.
DR   Pfam; PF05151; PsbM; 1.
DR   SUPFAM; SSF161033; SSF161033; 1.
DR   TIGRFAMs; TIGR03038; PS_II_psbM; 1.
PE   2: Evidence at transcript level;
KW   Chloroplast; Membrane; Photosynthesis; Photosystem II; Plastid;
KW   Reaction center; RNA editing; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..34
FT                   /note="Photosystem II reaction center protein M"
FT                   /id="PRO_0000217547"
FT   TRANSMEM        5..25
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00438"
SQ   SEQUENCE   34 AA;  3683 MW;  6FDD81D4FBBB57C2 CRC64;
     MEVNILAFIA TALFILIPTA FLLILYVQTA SQGS