ID   LHB3_RUBGE              Reviewed;          51 AA.
AC   P72281; P72283;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Light-harvesting protein B-800/850 beta chain;
DE   AltName: Full=Antenna pigment protein beta chain;
DE   AltName: Full=LH2 beta polypeptide;
GN   Name=pucB;
OS   Rubrivivax gelatinosus (Rhodocyclus gelatinosus) (Rhodopseudomonas
OS   gelatinosa).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales; Rubrivivax.
OX   NCBI_TaxID=28068;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=151, and DSM 149 / LMG 4308 / 2150;
RA   Simmons A.E.;
RL   Submitted (AUG-1996) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7559566; DOI=10.1074/jbc.270.40.23875;
RA   Fowler G.J., Gardiner A.T., Mackenzie R.C., Barratt S.J., Simmons A.E.,
RA   Westerhuis W.H., Cogdell R.J., Hunter C.N.;
RT   "Heterologous expression of genes encoding bacterial light-harvesting
RT   complexes in Rhodobacter sphaeroides.";
RL   J. Biol. Chem. 270:23875-23882(1995).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=DSM 151 / LMG 4306 / Dr 2;
RX   PubMed=16228472; DOI=10.1023/a:1006403901559;
RA   Simmons A.E., Barrett S.J., Hunter C.N., Cogdell R.J.;
RT   "Cloning, sequencing and analysis of the pucC gene from Rubrivivax
RT   gelatinosus strain 151 and Rhodopseudomonas acidophila strain 10050.";
RL   Photosyn. Res. 65:69-82(2000).
RN   [4]
RP   PROTEIN SEQUENCE OF 2-51, AND SUBUNIT STRUCTURE.
RC   STRAIN=DSM 149 / LMG 4308 / 2150, and DSM 151 / LMG 4306 / Dr 2;
RX   PubMed=8020505; DOI=10.1111/j.1432-1033.1994.tb18911.x;
RA   Brunisholz R.A., Suter F., Zuber H.;
RT   "Structural and spectral characterisation of the antenna complexes of
RT   Rhodocyclus gelatinosus. Indications of a hairpin-like-arranged antenna
RT   apoprotein with an unusually high alanine content.";
RL   Eur. J. Biochem. 222:667-675(1994).
CC   -!- FUNCTION: Antenna complexes are light-harvesting systems, which
CC       transfer the excitation energy to the reaction centers.
CC   -!- SUBUNIT: An alpha/beta heterodimer conjugated to 3 bacteriochlorophyll
CC       molecules. The core complex is formed by different alpha and beta
CC       chains, binding bacteriochlorophyll molecules, and arranged most
CC       probably in tetrameric structures disposed around the reaction center.
CC       The non-pigmented gamma chains may constitute additional components (By
CC       similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane; Single-pass type II membrane
CC       protein.
CC   -!- SIMILARITY: Belongs to the antenna complex beta subunit family.
CC       {ECO:0000305}.
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DR   EMBL; U67154; AAB49630.1; -; Genomic_DNA.
DR   EMBL; U67155; AAB49633.1; -; Genomic_DNA.
DR   EMBL; AJ245615; CAB52410.1; -; Genomic_DNA.
DR   PIR; S66178; S66178.
DR   RefSeq; WP_014429072.1; NZ_JADOUB010000001.1.
DR   AlphaFoldDB; P72281; -.
DR   SMR; P72281; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030077; C:plasma membrane light-harvesting complex; IEA:InterPro.
DR   GO; GO:0042314; F:bacteriochlorophyll binding; IEA:UniProtKB-KW.
DR   GO; GO:0045156; F:electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0019684; P:photosynthesis, light reaction; IEA:InterPro.
DR   Gene3D; 1.20.5.250; -; 1.
DR   InterPro; IPR000066; Antenna_a/b.
DR   InterPro; IPR023623; Antenna_beta_CS.
DR   InterPro; IPR023624; Antenna_beta_dom_sf.
DR   InterPro; IPR002362; LHB-1/5.
DR   InterPro; IPR035889; Light-harvesting_complex.
DR   Pfam; PF00556; LHC; 1.
DR   PIRSF; PIRSF002900; Antenna_beta; 1.
DR   PRINTS; PR00674; LIGHTHARVSTB.
DR   SUPFAM; SSF56918; SSF56918; 1.
DR   PROSITE; PS00969; ANTENNA_COMP_BETA; 1.
PE   1: Evidence at protein level;
KW   Antenna complex; Bacteriochlorophyll; Cell inner membrane; Cell membrane;
KW   Chlorophyll; Chromophore; Direct protein sequencing;
KW   Light-harvesting polypeptide; Magnesium; Membrane; Metal-binding;
KW   Transmembrane; Transmembrane helix.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:8020505"
FT   CHAIN           2..51
FT                   /note="Light-harvesting protein B-800/850 beta chain"
FT                   /id="PRO_0000099825"
FT   TOPO_DOM        2..23
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        24..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        47..51
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000255"
FT   BINDING         40
FT                   /ligand="a bacteriochlorophyll"
FT                   /ligand_id="ChEBI:CHEBI:38201"
FT                   /ligand_part="Mg"
FT                   /ligand_part_id="ChEBI:CHEBI:25107"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255"
FT   VARIANT         31
FT                   /note="V -> I (in strain: DSM 149)"
SQ   SEQUENCE   51 AA;  5540 MW;  780733FC97F6A6C0 CRC64;
     MADDANKVWP SGLTTAEAEE LQKGLVDGTR VFGVIAVLAH ILAYAYTPWL H