ID   LHB1_MAGML              Reviewed;          46 AA.
AC   P95673;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 106.
DE   RecName: Full=Light-harvesting protein B-800/850 beta 1 chain;
DE   AltName: Full=Antenna pigment protein beta 1 chain;
GN   Name=B1;
OS   Magnetospirillum molischianum (Rhodospirillum molischianum).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodospirillales;
OC   Rhodospirillaceae; Magnetospirillum.
OX   NCBI_TaxID=1083;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=DSM 119 / LMG 4353 / Pfennig 3660;
RX   PubMed=8695630; DOI=10.1016/0005-2728(96)00017-5;
RA   Germeroth L., Reilaender H., Michel H.;
RT   "Molecular cloning, DNA sequence and transcriptional analysis of the
RT   Rhodospirillum molischianum B800/850 light-harvesting genes.";
RL   Biochim. Biophys. Acta 1275:145-150(1996).
RN   [2]
RP   PROTEIN SEQUENCE OF 2-46.
RC   STRAIN=DSM 119 / LMG 4353 / Pfennig 3660;
RX   PubMed=8504081; DOI=10.1021/bi00072a017;
RA   Germeroth L., Lottspeich F., Robert B., Michel H.;
RT   "Unexpected similarities of the B800-850 light-harvesting complex from
RT   Rhodospirillum molischianum to the B870 light-harvesting complexes from
RT   other purple photosynthetic bacteria.";
RL   Biochemistry 32:5615-5621(1993).
RN   [3]
RP   X-RAY CRYSTALLOGRAPHY (2.4 ANGSTROMS).
RC   STRAIN=DSM 119 / LMG 4353 / Pfennig 3660;
RX   PubMed=8736556; DOI=10.1016/s0969-2126(96)00063-9;
RA   Koepke J., Hu X., Muenke C., Schulten K., Michel H.;
RT   "The crystal structure of the light-harvesting complex II (B800-850) from
RT   Rhodospirillum molischianum.";
RL   Structure 4:581-597(1996).
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.
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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; S82431; AAB46769.1; -; Genomic_DNA.
DR   PIR; B49290; B49290.
DR   PDB; 1LGH; X-ray; 2.40 A; B/E/H/K=2-46.
DR   PDBsum; 1LGH; -.
DR   AlphaFoldDB; P95673; -.
DR   SMR; P95673; -.
DR   DrugBank; DB07646; UNDECYLAMINE-N,N-DIMETHYL-N-OXIDE.
DR   EvolutionaryTrace; P95673; -.
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   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:8504081"
FT   CHAIN           2..46
FT                   /note="Light-harvesting protein B-800/850 beta 1 chain"
FT                   /id="PRO_0000099827"
FT   TOPO_DOM        2..19
FT                   /note="Cytoplasmic"
FT   TRANSMEM        20..42
FT                   /note="Helical"
FT   TOPO_DOM        43..46
FT                   /note="Periplasmic"
FT   BINDING         18
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   BINDING         36
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   STRAND          6..8
FT                   /evidence="ECO:0007829|PDB:1LGH"
FT   HELIX           11..42
FT                   /evidence="ECO:0007829|PDB:1LGH"
SQ   SEQUENCE   46 AA;  5247 MW;  4125AEB8D9091A43 CRC64;
     MAERSLSGLT EEEAIAVHDQ FKTTFSAFII LAAVAHVLVW VWKPWF