ID   PSBL_SYNE7              Reviewed;          40 AA.
AC   Q8KPP1; Q31P14;
DT   15-AUG-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=Photosystem II reaction center protein L {ECO:0000255|HAMAP-Rule:MF_01317};
DE            Short=PSII-L {ECO:0000255|HAMAP-Rule:MF_01317};
GN   Name=psbL {ECO:0000255|HAMAP-Rule:MF_01317};
GN   OrderedLocusNames=Synpcc7942_1175; ORFNames=see0054;
OS   Synechococcus elongatus (strain PCC 7942 / FACHB-805) (Anacystis nidulans
OS   R2).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus.
OX   NCBI_TaxID=1140;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Holtman C.K., Sandoval P., Chen Y., Socias T., Mohler B.J., McMurtry S.,
RA   Gonzalez A., Salinas I., Golden S.S., Youderian P.;
RT   "Synechococcus elongatus PCC7942 cosmid 7G3.";
RL   Submitted (JUN-2002) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7942 / FACHB-805;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Schmutz J., Larimer F., Land M.,
RA   Kyrpides N., Lykidis A., Richardson P.;
RT   "Complete sequence of chromosome 1 of Synechococcus elongatus PCC 7942.";
RL   Submitted (AUG-2005) 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 and is required for
CC       correct PSII assembly and/or dimerization. {ECO:0000255|HAMAP-
CC       Rule:MF_01317}.
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_01317}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01317}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01317}.
CC   -!- SIMILARITY: Belongs to the PsbL family. {ECO:0000255|HAMAP-
CC       Rule:MF_01317}.
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DR   EMBL; AY120853; AAM82729.1; -; Genomic_DNA.
DR   EMBL; CP000100; ABB57205.1; -; Genomic_DNA.
DR   RefSeq; WP_011377901.1; NC_007604.1.
DR   AlphaFoldDB; Q8KPP1; -.
DR   SMR; Q8KPP1; -.
DR   STRING; 1140.Synpcc7942_1175; -.
DR   TCDB; 3.E.2.2.1; the photosynthetic reaction center (prc) family.
DR   PRIDE; Q8KPP1; -.
DR   EnsemblBacteria; ABB57205; ABB57205; Synpcc7942_1175.
DR   KEGG; syf:Synpcc7942_1175; -.
DR   eggNOG; ENOG5033AKP; Bacteria.
DR   HOGENOM; CLU_214425_0_0_3; -.
DR   BioCyc; MetaCyc:SYNPCC7942_1175-MON; -.
DR   BioCyc; SYNEL:SYNPCC7942_1175-MON; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009539; C:photosystem II reaction center; IEA:InterPro.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_01317; PSII_PsbL; 1.
DR   InterPro; IPR003372; PSII_PsbL.
DR   InterPro; IPR037266; PSII_PsbL_sf.
DR   Pfam; PF02419; PsbL; 1.
DR   SUPFAM; SSF161017; SSF161017; 1.
PE   3: Inferred from homology;
KW   Membrane; Photosynthesis; Photosystem II; Reaction center; Thylakoid;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..40
FT                   /note="Photosystem II reaction center protein L"
FT                   /id="PRO_0000219792"
FT   TRANSMEM        19..39
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01317"
SQ   SEQUENCE   40 AA;  4575 MW;  21FB58A934C200BE CRC64;
     MPTRSTNPNK QPVELNRTSL FLGLLLVFVL GILFSSYFFN