ID   PCBB_PROMM              Reviewed;         350 AA.
AC   Q7V6U4;
DT   24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 94.
DE   RecName: Full=Divinyl chlorophyll a/b light-harvesting protein PcbB;
GN   Name=pcbB; OrderedLocusNames=PMT_1046;
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   I, 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 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 (By similarity). Under
CC       iron-starvation forms a complex with PSI, consisting of a PSI trimer
CC       surrounded by a ring composed of 18 PcbB subunits.
CC       {ECO:0000250|UniProtKB:Q6Q972, 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: By iron starvation. {ECO:0000269|PubMed:12944966}.
CC   -!- SIMILARITY: Belongs to the PsbB/PsbC family. IsiA/Pcb subfamily.
CC       {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; BX548175; CAE21221.1; -; Genomic_DNA.
DR   RefSeq; WP_011130418.1; NC_005071.1.
DR   AlphaFoldDB; Q7V6U4; -.
DR   SMR; Q7V6U4; -.
DR   STRING; 74547.PMT_1046; -.
DR   EnsemblBacteria; CAE21221; CAE21221; PMT_1046.
DR   KEGG; pmt:PMT_1046; -.
DR   eggNOG; ENOG5033QV9; Bacteria.
DR   HOGENOM; CLU_028310_0_0_3; -.
DR   OMA; YDLNLSH; -.
DR   OrthoDB; 417558at2; -.
DR   Proteomes; UP000001423; 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: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 I;
KW   Reference proteome; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..350
FT                   /note="Divinyl chlorophyll a/b light-harvesting protein
FT                   PcbB"
FT                   /id="PRO_0000077547"
FT   TRANSMEM        27..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        89..109
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        141..161
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        202..222
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        244..264
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        305..325
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   350 AA;  38543 MW;  1031638F9A7BBF6C CRC64;
     MQTYGNPNPT YGWWAGNAGT TNRSGKFLAA HIAHTGLMAF WAGSFTLFEL SRYDPSVPMG
     HQPLVALPHL ATLGIGVGDG GVITDTYPIV VTAVLHLVLS MVYAAGGLMH SLLFNGDIGE
     MGVKWARKFD FKWDDPDKLT FILGHHLFLL GLGNVQFVEW AKYYGLYDNA EGVVRTVVPN
     LNIGMVWNAQ FNFLAINSLE DVMGGHAFLA LFMMSGGLWH IVTKQAGEYT TFKGKGILSA
     EAQLSWALAG VGWMALVAAF WCASNTTIYP DTFFGEVLDL KFSISPYWVD TANLPEGTYT
     SRAWLTNIHY YLGFFYIQGH LWHALRALGF DFKRVSNAIG NADSATITLN