ID   LHB_ROSDO               Reviewed;          50 AA.
AC   P26274; Q16DV1;
DT   01-MAY-1992, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 126.
DE   RecName: Full=Light-harvesting protein B-870 beta chain;
DE   AltName: Full=Antenna pigment protein beta chain;
GN   Name=pufB; OrderedLocusNames=RD1_0107;
OS   Roseobacter denitrificans (strain ATCC 33942 / OCh 114) (Erythrobacter sp.
OS   (strain OCh 114)) (Roseobacter denitrificans).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales;
OC   Roseobacteraceae; Roseobacter.
OX   NCBI_TaxID=375451;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1787796; DOI=10.1111/j.1365-2958.1991.tb00792.x;
RA   Liebetanz R., Hornberger U., Drews G.;
RT   "Organization of the genes coding for the reaction-centre L and M subunits
RT   and B870 antenna polypeptides alpha and beta from the aerobic
RT   photosynthetic bacterium Erythrobacter species OCH114.";
RL   Mol. Microbiol. 5:1459-1468(1991).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33942 / OCh 114;
RX   PubMed=17098896; DOI=10.1128/jb.01390-06;
RA   Swingley W.D., Sadekar S., Mastrian S.D., Matthies H.J., Hao J., Ramos H.,
RA   Acharya C.R., Conrad A.L., Taylor H.L., Dejesa L.C., Shah M.K.,
RA   O'Huallachain M.E., Lince M.T., Blankenship R.E., Beatty J.T.,
RA   Touchman J.W.;
RT   "The complete genome sequence of Roseobacter denitrificans reveals a
RT   mixotrophic rather than photosynthetic metabolism.";
RL   J. Bacteriol. 189:683-690(2007).
CC   -!- FUNCTION: Antenna complexes are light-harvesting systems, which
CC       transfer the excitation energy to the reaction centers.
CC   -!- SUBUNIT: The core complex is formed by different alpha and beta chains,
CC       binding bacteriochlorophyll molecules, and arranged most probably in
CC       tetrameric structures disposed around the reaction center. The non-
CC       pigmented gamma chains may constitute additional components.
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; X57597; CAA40815.1; -; Genomic_DNA.
DR   EMBL; CP000362; ABG29842.1; -; Genomic_DNA.
DR   RefSeq; WP_011566464.1; NZ_FOOO01000011.1.
DR   AlphaFoldDB; P26274; -.
DR   SMR; P26274; -.
DR   STRING; 375451.RD1_0107; -.
DR   EnsemblBacteria; ABG29842; ABG29842; RD1_0107.
DR   KEGG; rde:RD1_0107; -.
DR   eggNOG; ENOG5032K5R; Bacteria.
DR   HOGENOM; CLU_199082_2_0_5; -.
DR   OMA; EFHSIFM; -.
DR   Proteomes; UP000007029; Chromosome.
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   3: Inferred from homology;
KW   Antenna complex; Bacteriochlorophyll; Cell inner membrane; Cell membrane;
KW   Chlorophyll; Chromophore; Light-harvesting polypeptide; Magnesium;
KW   Membrane; Metal-binding; Reference proteome; Transmembrane;
KW   Transmembrane helix.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..50
FT                   /note="Light-harvesting protein B-870 beta chain"
FT                   /id="PRO_0000099814"
FT   TOPO_DOM        2..22
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        23..45
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        46..50
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000255"
FT   BINDING         21
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   BINDING         39
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"
SQ   SEQUENCE   50 AA;  5592 MW;  92E2CDDD46659369 CRC64;
     MADNTDLSFT GLTDEQAQEL HSVYMSGLFL FAAVAVVAHL ATYIWRPWFG