ID   LHA_BLAVI               Reviewed;          69 AA.
AC   P04123;
DT   20-MAR-1987, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 97.
DE   RecName: Full=Light-harvesting protein B-1015 alpha chain;
DE   AltName: Full=Antenna pigment protein alpha chain;
DE   Flags: Precursor;
GN   Name=pufA;
OS   Blastochloris viridis (Rhodopseudomonas viridis).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Blastochloridaceae; Blastochloris.
OX   NCBI_TaxID=1079;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1693143; DOI=10.1128/jb.172.6.2877-2887.1990;
RA   Wiessner C., Dunger I., Michel H.;
RT   "Structure and transcription of the genes encoding the B1015 light-
RT   harvesting complex beta and alpha subunits and the photosynthetic reaction
RT   center L, M, and cytochrome c subunits from Rhodopseudomonas viridis.";
RL   J. Bacteriol. 172:2877-2887(1990).
RN   [2]
RP   PROTEIN SEQUENCE OF 2-59.
RX   PubMed=3890891; DOI=10.1515/bchm3.1985.366.1.87;
RA   Brunisholz R.A., Jay F., Suter F., Zuber H.;
RT   "The light-harvesting polypeptides of Rhodopseudomonas viridis. The
RT   complete amino-acid sequences of B1015-alpha, B1015-beta and B1015-gamma.";
RL   Biol. Chem. Hoppe-Seyler 366:87-98(1985).
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 alpha subunit family.
CC       {ECO:0000305}.
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DR   EMBL; M55261; AAA64256.1; -; Genomic_DNA.
DR   PIR; C35382; LBRFAV.
DR   RefSeq; WP_055036365.1; NZ_LN907867.1.
DR   PDB; 6ET5; EM; 3.00 A; 3/6/F/K/P/S/V/Y/b/e/h/k/n/q/t/w/z=1-59.
DR   PDBsum; 6ET5; -.
DR   AlphaFoldDB; P04123; -.
DR   SMR; P04123; -.
DR   IntAct; P04123; 1.
DR   STRING; 1079.BVIR_603; -.
DR   OrthoDB; 2077221at2; -.
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   1: Evidence at protein level;
KW   3D-structure; Antenna complex; Bacteriochlorophyll; Cell inner membrane;
KW   Cell membrane; 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:3890891"
FT   CHAIN           2..59
FT                   /note="Light-harvesting protein B-1015 alpha chain"
FT                   /id="PRO_0000001627"
FT   PROPEP          60..69
FT                   /id="PRO_0000001628"
FT   TOPO_DOM        2..20
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        21..41
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        42..59
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000255"
FT   BINDING         37
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   STRAND          6..8
FT                   /evidence="ECO:0007829|PDB:6ET5"
FT   HELIX           9..11
FT                   /evidence="ECO:0007829|PDB:6ET5"
FT   HELIX           12..16
FT                   /evidence="ECO:0007829|PDB:6ET5"
FT   HELIX           18..40
FT                   /evidence="ECO:0007829|PDB:6ET5"
FT   STRAND          49..51
FT                   /evidence="ECO:0007829|PDB:6ET5"
SQ   SEQUENCE   69 AA;  7895 MW;  EAB8C210A6DE58F8 CRC64;
     MATEYRTASW KLWLILDPRR VLTALFVYLT VIALLIHFGL LSTDRLNWWE FQRGLPKAAS
     LVVVPPAVG