ID   PCBA_PROMM              Reviewed;         368 AA.
AC   Q7V872;
DT   24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=Divinyl chlorophyll a/b light-harvesting protein PcbA;
GN   Name=pcbA; OrderedLocusNames=PMT_0496;
OS   Prochlorococcus marinus (strain MIT 9313).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=74547;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MIT 9313;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
RN   [2]
RP   SUBCELLULAR LOCATION, INDUCTION, INVOLVEMENT IN COMPLEXES WITH PHOTOSYSTEM
RP   II, AND SUBUNIT.
RX   PubMed=12944966; DOI=10.1038/nature01933;
RA   Bibby T.S., Mary I., Nield J., Partensky F., Barber J.;
RT   "Low-light-adapted Prochlorococcus species possess specific antennae for
RT   each photosystem.";
RL   Nature 424:1051-1054(2003).
CC   -!- FUNCTION: The antenna complex functions as a light receptor, it
CC       captures and delivers excitation energy to photosystems II. 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 (By similarity). Forms
CC       complexes with PSII, consisting of a PSII dimer and 4 or 8 PcbA
CC       subunits. These complexes are also found under conditions of iron-
CC       starvation. {ECO:0000250|UniProtKB:Q6Q972,
CC       ECO:0000269|PubMed:12944966}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000269|PubMed:12944966}; Multi-pass membrane protein
CC       {ECO:0000269|PubMed:12944966}.
CC   -!- INDUCTION: Transcription decreases upon iron starvation.
CC       {ECO:0000269|PubMed:12944966}.
CC   -!- SIMILARITY: Belongs to the PsbB/PsbC family. IsiA/Pcb subfamily.
CC       {ECO:0000305}.
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DR   EMBL; BX548175; CAE20671.1; -; Genomic_DNA.
DR   RefSeq; WP_011129875.1; NC_005071.1.
DR   AlphaFoldDB; Q7V872; -.
DR   SMR; Q7V872; -.
DR   STRING; 74547.PMT_0496; -.
DR   EnsemblBacteria; CAE20671; CAE20671; PMT_0496.
DR   KEGG; pmt:PMT_0496; -.
DR   eggNOG; ENOG5033QV9; Bacteria.
DR   HOGENOM; CLU_028310_0_0_3; -.
DR   OMA; FGEYTEF; -.
DR   OrthoDB; 417558at2; -.
DR   Proteomes; UP000001423; 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: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   1: Evidence at protein level;
KW   Chlorophyll; Chromophore; Membrane; Photosynthesis; Photosystem II;
KW   Reference proteome; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..368
FT                   /note="Divinyl chlorophyll a/b light-harvesting protein
FT                   PcbA"
FT                   /id="PRO_0000077546"
FT   TRANSMEM        27..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        63..83
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        89..109
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        203..223
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        243..263
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        307..327
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   368 AA;  40769 MW;  AD9472087AA3E534 CRC64;
     MQTYGKTDVT YAWYAGNSGV TNRSGRFIAS HIGHTGLICF GAGANTLFEL ARYDSALPIG
     DQGFVVLPHL AGLGIGGIEN GVITDSYGML VVAVFHLIFS AVYAGGAMLH SFRYKEDLGE
     YPQGSRPNKF DFKWDDPDRL TFILGHHLLF LGLGCVQFVE WAKYHGIYDP AMGVVRKVEY
     NLDLSMVWNH QIDFLTINSL EDVMGGHAFL AFFLSAGAIW HIFSKPFGEY TEFKGKGLLS
     AEFVLSTSLA GAAFIAFVAA FWASMNTTIY PTDLYGGPLN IELNFAPYFS DTDPLFGGDL
     HSARSWLSNF HFYLGFFYLQ GHFWHGLRAM GFDFKRVEKL FDQLESNEIS LNPAKSTTVP
     STSTDSAT