LHB1_RHOCA
ID LHB1_RHOCA Reviewed; 49 AA.
AC P02950;
DT 21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT 23-JAN-2007, sequence version 3.
DT 03-AUG-2022, entry version 114.
DE RecName: Full=Light-harvesting protein B-870 beta chain;
DE AltName: Full=Antenna pigment protein beta chain;
DE AltName: Full=LH-2;
GN Name=pufB;
OS Rhodobacter capsulatus (Rhodopseudomonas capsulata).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales;
OC Rhodobacteraceae; Rhodobacter.
OX NCBI_TaxID=1061;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=16593406; DOI=10.1073/pnas.81.1.189;
RA Youvan D.C., Alberti M., Begusch H., Bylina E.J., Hearst J.E.;
RT "Reaction center and light-harvesting I genes from Rhodopseudomonas
RT capsulata.";
RL Proc. Natl. Acad. Sci. U.S.A. 81:189-192(1984).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=6744416; DOI=10.1016/0092-8674(84)90429-x;
RA Youvan D.C., Bylina E.J., Alberti M., Begusch H., Hearst J.E.;
RT "Nucleotide and deduced polypeptide sequences of the photosynthetic
RT reaction-center, B870 antenna, and flanking polypeptides from R.
RT capsulata.";
RL Cell 37:949-957(1984).
RN [3]
RP PROTEIN SEQUENCE OF 2-49.
RX PubMed=6363069; DOI=10.1111/j.1432-1033.1984.tb07902.x;
RA Tadros M.H., Suter F., Seydewitz H.H., Witt I., Zuber H., Drews G.;
RT "Isolation and complete amino-acid sequence of the small polypeptide from
RT light-harvesting pigment-protein complex I (B870) of Rhodopseudomonas
RT capsulata.";
RL Eur. J. Biochem. 138:209-212(1984).
RN [4]
RP PROTEIN SEQUENCE OF 2-21.
RC STRAIN=ATCC 33303 / B10;
RX PubMed=2254277; DOI=10.1128/jb.172.12.7131-7137.1990;
RA Stiehle H., Cortez N., Klug G., Drews G.;
RT "A negatively charged N-terminus in the alpha polypeptide inhibits
RT formation of light-harvesting complex I in Rhodobacter capsulatus.";
RL J. Bacteriol. 172:7131-7137(1990).
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; K01183; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR EMBL; K01184; AAA26172.1; -; Genomic_DNA.
DR EMBL; Z11165; CAA77552.1; -; Genomic_DNA.
DR PIR; A03451; LBRFBC.
DR RefSeq; WP_013066435.1; NZ_VIBE01000010.1.
DR AlphaFoldDB; P02950; -.
DR SMR; P02950; -.
DR GeneID; 31489637; -.
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:2254277,
FT ECO:0000269|PubMed:6363069"
FT CHAIN 2..49
FT /note="Light-harvesting protein B-870 beta chain"
FT /id="PRO_0000099822"
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..49
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 49 AA; 5466 MW; 957306DD335A23FB CRC64;
MADKNDLSFT GLTDEQAQEL HAVYMSGLSA FIAVAVLAHL AVMIWRPWF
