ID   PCBA_PROMT              Reviewed;         349 AA.
AC   Q46LS0;
DT   24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   03-AUG-2022, entry version 78.
DE   RecName: Full=Divinyl chlorophyll a/b light-harvesting protein PcbA;
GN   Name=pcbA; OrderedLocusNames=PMN2A_0066;
OS   Prochlorococcus marinus (strain NATL2A).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59920;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NATL2A;
RX   PubMed=18159947; DOI=10.1371/journal.pgen.0030231;
RA   Kettler G.C., Martiny A.C., Huang K., Zucker J., Coleman M.L., Rodrigue S.,
RA   Chen F., Lapidus A., Ferriera S., Johnson J., Steglich C., Church G.M.,
RA   Richardson P., Chisholm S.W.;
RT   "Patterns and implications of gene gain and loss in the evolution of
RT   Prochlorococcus.";
RL   PLoS Genet. 3:2515-2528(2007).
CC   -!- FUNCTION: The antenna complex functions as a light receptor, it
CC       captures and delivers excitation energy to photosystems II and I. The
CC       Prochlorales pcb genes are not related to higher plant LHCs.
CC       {ECO:0000250|UniProtKB:Q6Q972}.
CC   -!- COFACTOR:
CC       Name=divinyl chlorophyll a; Xref=ChEBI:CHEBI:73095;
CC         Evidence={ECO:0000250|UniProtKB:Q6Q972};
CC   -!- COFACTOR:
CC       Name=divinyl chlorophyll b; Xref=ChEBI:CHEBI:73096;
CC         Evidence={ECO:0000250|UniProtKB:Q6Q972};
CC   -!- SUBUNIT: The antenna complex consists of divinyl chlorophylls (a and b)
CC       and divinyl chlorophyll a/b binding proteins and binds more divinyl
CC       chlorophyll b than does the antenna complex from high-light-adapted
CC       Prochlorococcus. {ECO:0000250|UniProtKB:Q6Q972}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000250|UniProtKB:Q6Q972}; Multi-pass membrane protein
CC       {ECO:0000250}.
CC   -!- MISCELLANEOUS: This low-light-adapted strain contains 7 pcb genes.
CC       {ECO:0000303|PubMed:18159947}.
CC   -!- SIMILARITY: Belongs to the PsbB/PsbC family. IsiA/Pcb subfamily.
CC       {ECO:0000305}.
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DR   EMBL; CP000095; AAZ57558.1; -; Genomic_DNA.
DR   RefSeq; WP_011293600.1; NC_007335.2.
DR   AlphaFoldDB; Q46LS0; -.
DR   SMR; Q46LS0; -.
DR   STRING; 59920.PMN2A_0066; -.
DR   EnsemblBacteria; AAZ57558; AAZ57558; PMN2A_0066.
DR   KEGG; pmn:PMN2A_0066; -.
DR   HOGENOM; CLU_028310_0_0_3; -.
DR   OMA; YDLNLSH; -.
DR   OrthoDB; 417558at2; -.
DR   PhylomeDB; Q46LS0; -.
DR   Proteomes; UP000002535; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009522; C:photosystem I; 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:0016168; F:chlorophyll binding; IEA:UniProtKB-KW.
DR   GO; GO:0009767; P:photosynthetic electron transport chain; IEA:InterPro.
DR   InterPro; IPR000932; PS_antenna-like.
DR   InterPro; IPR036001; PS_II_antenna-like_sf.
DR   PANTHER; PTHR33180; PTHR33180; 2.
DR   Pfam; PF00421; PSII; 1.
DR   SUPFAM; SSF161077; SSF161077; 1.
PE   3: Inferred from homology;
KW   Chlorophyll; Chromophore; Membrane; Photosynthesis; Photosystem I;
KW   Photosystem II; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..349
FT                   /note="Divinyl chlorophyll a/b light-harvesting protein
FT                   PcbA"
FT                   /id="PRO_0000077549"
FT   TRANSMEM        27..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        57..77
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        89..109
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        202..222
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        242..262
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        304..324
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   349 AA;  38212 MW;  6B60D27954F2017D CRC64;
     MQTYGNSAVT YGWWAGNSGV TNRSGKFIAA HAAHTGLIAF WAGAFTLFEL ARFDPSVPMG
     HQPLIALPHL ATLGIGFDET GTFVGGSAVV AVAVCHLVGS MAYGAGGLMH SLLFSSDMQE
     SSVPQARKFK LEWDNPDNQT FILGHHLIFF GVACIWFVEW ARIHGVYDPS IGAIRQVEYD
     LNLSHIWDHQ FDFLTIDSLE DVMGGHAFLA FLEITGGAFH IATKQVGEYT KFKGAGLLSA
     EAILSWSLAG IGWMAVVAAF WSATNTTVYP VEWFGEPLAL KFGISPYWVD TVDLGSAHTS
     RAWLANVHYY FGFFFIQGHL WHALRAMGFD FKRVTSALSN LDTASVSLK