ID   PCBB_PROHO              Reviewed;         347 AA.
AC   P95504;
DT   24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1997, sequence version 1.
DT   03-AUG-2022, entry version 69.
DE   RecName: Full=Chlorophyll a/b light-harvesting protein PcbB;
GN   Name=pcbB;
OS   Prochlorothrix hollandica.
OC   Bacteria; Cyanobacteria; Pseudanabaenales; Prochlorotrichaceae;
OC   Prochlorothrix.
OX   NCBI_TaxID=1223;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RX   PubMed=8986795; DOI=10.1073/pnas.93.26.15244;
RA   La Roche J., van der Staay G.W.M., Partensky F., Ducret A., Aebersold R.R.,
RA   Li R., Golden S.S., Hiller R.G., Wrench P.M., Larkum A.W.D., Green B.R.;
RT   "Independent evolution of the prochlorophyte and green plant chlorophyll
RT   a/b light-harvesting proteins.";
RL   Proc. Natl. Acad. Sci. U.S.A. 93:15244-15248(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=9526503; DOI=10.1023/a:1005930210515;
RA   van der Staay G.W.M., Yurkova N., Green B.R.;
RT   "The 38 kDa chlorophyll a/b protein of the prokaryote Prochlorothrix
RT   hollandica is encoded by a divergent pcb gene.";
RL   Plant Mol. Biol. 36:709-716(1998).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   van der Staay G.W.M., Ducret A., Aebersold R.R., Li R., Golden S.S.,
RA   Hiller R.G., Wrench P.M., Larkum A.W.D., Green B.R.;
RT   "The Chl a/b antenna from prochlorophytes is related to the iron stress-
RT   induced Chl a antenna from cyanobacteria.";
RL   (In) Mathis P. (eds.);
RL   Photosynthesis from light to biosphere, pp.1:175-178, Kluwer Academic
RL   Publishers, Dordrechts (1995).
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, ECO:0000303|PubMed:8986795}.
CC   -!- COFACTOR:
CC       Name=chlorophyll a; Xref=ChEBI:CHEBI:58416;
CC         Evidence={ECO:0000250|UniProtKB:Q6Q972};
CC       Note=Chlorophyll a. {ECO:0000250|UniProtKB:Q6Q972};
CC   -!- COFACTOR:
CC       Name=chlorophyll b; Xref=ChEBI:CHEBI:61721;
CC         Evidence={ECO:0000250|UniProtKB:Q6Q972};
CC       Note=Chlorophyll b. {ECO:0000250|UniProtKB:Q6Q972};
CC   -!- SUBUNIT: The antenna complex consists of chlorophylls (a and b) and
CC       chlorophyll a/b binding proteins. {ECO:0000250|UniProtKB:Q6Q972}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000250|UniProtKB:Q6Q972}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:Q6Q972}.
CC   -!- SIMILARITY: Belongs to the PsbB/PsbC family. IsiA/Pcb subfamily.
CC       {ECO:0000305}.
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DR   EMBL; X97043; CAA65758.1; -; Genomic_DNA.
DR   AlphaFoldDB; P95504; -.
DR   SMR; P95504; -.
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; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..347
FT                   /note="Chlorophyll a/b light-harvesting protein PcbB"
FT                   /id="PRO_0000077536"
FT   TRANSMEM        25..45
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        64..84
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        91..111
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        206..226
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        247..267
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        308..328
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   347 AA;  37777 MW;  7D8724572C601450 CRC64;
     MQTYGSRNVD YGWWAGNSRF ADRTGLWLAA HVAQASFIVL WAGAITLFEV ARYTPSIPMG
     EQGLILIPHL AALGIGVGAG GVVVNTFPYT AIGAVHLISS FVFAFGAIFH VRFGPESIGE
     GSDSKFAFSW DDPKQLGLIL GHHLLLLGLG AIFFVGWIRF HGVYDSTIGD VRIVSNPGAT
     ILSVIFEYGW FTPEHNPFFV NNLEDLASGH AFIGVVLLSG GVWHITQEPF AWAQRLLASL
     FSAEGLLSSA LAGLSMLGFA AAYFSAVNTL AYPIEFFGPP LELQFNIMPY FVDSVDLPAG
     VYSARAWLCN VHFYLAFFVL QGHLWHAIRA IGFDFKKVSN AFATLSN