ID   PCBB_PROMT              Reviewed;         352 AA.
AC   Q46LC1;
DT   24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   03-AUG-2022, entry version 80.
DE   RecName: Full=Divinyl chlorophyll a/b light-harvesting protein PcbB;
GN   Name=pcbB; OrderedLocusNames=PMN2A_0215;
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; AAZ57707.1; -; Genomic_DNA.
DR   RefSeq; WP_011293749.1; NC_007335.2.
DR   AlphaFoldDB; Q46LC1; -.
DR   SMR; Q46LC1; -.
DR   STRING; 59920.PMN2A_0215; -.
DR   EnsemblBacteria; AAZ57707; AAZ57707; PMN2A_0215.
DR   KEGG; pmn:PMN2A_0215; -.
DR   HOGENOM; CLU_028310_0_0_3; -.
DR   OMA; FGEYTEF; -.
DR   OrthoDB; 417558at2; -.
DR   PhylomeDB; Q46LC1; -.
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..352
FT                   /note="Divinyl chlorophyll a/b light-harvesting protein
FT                   PcbB"
FT                   /id="PRO_0000077550"
FT   TRANSMEM        27..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        89..109
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        142..162
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   352 AA;  38760 MW;  6450C2AECB38FAD0 CRC64;
     MQTYGNPSVT YDWYAGNSGT ANRSGKFIAA HAAHAGLMMF WAGAFTLFEL ARYDSSVAMG
     NQNLICLPHL AQLGIGGIEN GVITEPYGCT VIAVLHLIFS GVLGAGGILH STRYDGDLGN
     YPEGSRPKKF DFEWDDPDKL TFILGHHLIF LGLANIQFVE WAQYHGIWDT ALGATRTVSY
     NLDLGMIWNH QADFLQITSL EDVMGGHAFL AFFQIIGGAF HIITKQFGEY TEFKGKGLLS
     AEAVLSYSLA GVGYCALVAA FWSSTNTTVY STEFFGEVLQ LKFDFAPYFV DTDPSLAAGA
     HTARAWLANV HFYLGFFFIQ GHLWHALRAM GFDFRRVGKA FDNMENAKIT NG