ID   LHA1_RUBGI              Reviewed;          67 AA.
AC   I0HUL6; P51756; P95615;
DT   05-SEP-2012, integrated into UniProtKB/Swiss-Prot.
DT   13-JUN-2012, sequence version 1.
DT   03-AUG-2022, entry version 40.
DE   RecName: Full=Light-harvesting protein B-870 alpha chain;
DE   AltName: Full=Antenna pigment protein alpha chain;
DE   AltName: Full=Light-harvesting protein B-875 alpha chain;
GN   Name=pufA; OrderedLocusNames=RGE_33640;
OS   Rubrivivax gelatinosus (strain NBRC 100245 / IL144).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales; Rubrivivax.
OX   NCBI_TaxID=983917;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=NBRC 100245 / IL144;
RX   PubMed=8300574; DOI=10.1016/s0021-9258(17)41970-3;
RA   Nagashima K.V.P., Matsuura K., Ohyama S., Shimada K.;
RT   "Primary structure and transcription of genes encoding B870 and
RT   photosynthetic reaction center apoproteins from Rubrivivax gelatinosus.";
RL   J. Biol. Chem. 269:2477-2484(1994).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NBRC 100245 / IL144;
RX   PubMed=22689232; DOI=10.1128/jb.00511-12;
RA   Nagashima S., Kamimura A., Shimizu T., Nakamura-Isaki S., Aono E.,
RA   Sakamoto K., Ichikawa N., Nakazawa H., Sekine M., Yamazaki S., Fujita N.,
RA   Shimada K., Hanada S., Nagashima K.V.;
RT   "Complete genome sequence of phototrophic betaproteobacterium Rubrivivax
RT   gelatinosus IL144.";
RL   J. Bacteriol. 194:3541-3542(2012).
CC   -!- FUNCTION: Antenna complexes are light-harvesting systems, which
CC       transfer the excitation energy to the reaction centers.
CC   -!- SUBUNIT: An alpha/beta heterodimer. The core complex is formed by
CC       different alpha and beta chains, binding bacteriochlorophyll molecules,
CC       and arranged most probably in tetrameric structures disposed around the
CC       reaction center. The non-pigmented gamma chains may constitute
CC       additional components (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane; Single-pass type II membrane
CC       protein.
CC   -!- SIMILARITY: Belongs to the antenna complex alpha subunit family.
CC       {ECO:0000305}.
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DR   EMBL; D16822; BAA04099.1; -; Genomic_DNA.
DR   EMBL; AP012320; BAL96703.1; -; Genomic_DNA.
DR   PIR; D49964; D49964.
DR   PIR; T50888; T50888.
DR   RefSeq; WP_014429564.1; NC_017075.1.
DR   AlphaFoldDB; I0HUL6; -.
DR   SMR; I0HUL6; -.
DR   STRING; 983917.RGE_33640; -.
DR   EnsemblBacteria; BAL96703; BAL96703; RGE_33640.
DR   KEGG; rge:RGE_33640; -.
DR   PATRIC; fig|983917.3.peg.3291; -.
DR   eggNOG; ENOG50302TE; Bacteria.
DR   HOGENOM; CLU_205201_0_0_4; -.
DR   OMA; NWLEGPR; -.
DR   OrthoDB; 2077221at2; -.
DR   Proteomes; UP000007883; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0019866; C:organelle inner membrane; IEA:InterPro.
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; 4.10.220.20; -; 1.
DR   InterPro; IPR000066; Antenna_a/b.
DR   InterPro; IPR018332; Antenna_alpha.
DR   InterPro; IPR002361; Antenna_alpha_CS.
DR   InterPro; IPR035889; Light-harvesting_complex.
DR   Pfam; PF00556; LHC; 1.
DR   PRINTS; PR00673; LIGHTHARVSTA.
DR   SUPFAM; SSF56918; SSF56918; 1.
DR   PROSITE; PS00968; ANTENNA_COMP_ALPHA; 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   CHAIN           1..67
FT                   /note="Light-harvesting protein B-870 alpha chain"
FT                   /id="PRO_0000418666"
FT   TOPO_DOM        1..12
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        13..33
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        34..67
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000255"
FT   BINDING         29
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   67 AA;  7376 MW;  121143F12F30135C CRC64;
     MWRIWRLFDP MRAMVAQAVF LLGLAVLIHL MLLGTNKYNW LDGAKKAPVA TAVAPVPAEV
     TSLAQAK