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BCHB_RHOPS
ID   BCHB_RHOPS              Reviewed;         535 AA.
AC   Q132N3;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   31-OCT-2006, sequence version 1.
DT   03-AUG-2022, entry version 82.
DE   RecName: Full=Light-independent protochlorophyllide reductase subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE            Short=DPOR subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE            Short=LI-POR subunit B {ECO:0000255|HAMAP-Rule:MF_00353};
DE            EC=1.3.7.7 {ECO:0000255|HAMAP-Rule:MF_00353};
GN   Name=bchB {ECO:0000255|HAMAP-Rule:MF_00353}; OrderedLocusNames=RPD_3735;
OS   Rhodopseudomonas palustris (strain BisB5).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Bradyrhizobiaceae; Rhodopseudomonas.
OX   NCBI_TaxID=316057;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=BisB5;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M.,
RA   Hauser L., Pelletier D.A., Kyrpides N., Lykidis A., Oda Y., Harwood C.S.,
RA   Richardson P.;
RT   "Complete sequence of Rhodopseudomonas palustris BisB5.";
RL   Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Component of the dark-operative protochlorophyllide reductase
CC       (DPOR) that uses Mg-ATP and reduced ferredoxin to reduce ring D of
CC       protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide). This
CC       reaction is light-independent. The NB-protein (BchN-BchB) is the
CC       catalytic component of the complex. {ECO:0000255|HAMAP-Rule:MF_00353}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 ADP + chlorophyllide a + oxidized 2[4Fe-4S]-[ferredoxin] + 2
CC         phosphate = 2 ATP + 2 H2O + protochlorophyllide a + reduced 2[4Fe-
CC         4S]-[ferredoxin]; Xref=Rhea:RHEA:28202, Rhea:RHEA-COMP:10002,
CC         Rhea:RHEA-COMP:10004, ChEBI:CHEBI:15377, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33722, ChEBI:CHEBI:33723, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:83348, ChEBI:CHEBI:83350, ChEBI:CHEBI:456216; EC=1.3.7.7;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00353};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00353};
CC       Note=Binds 1 [4Fe-4S] cluster per heterodimer. The cluster is bound at
CC       the heterodimer interface by residues from both subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00353};
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; bacteriochlorophyll
CC       biosynthesis (light-independent). {ECO:0000255|HAMAP-Rule:MF_00353}.
CC   -!- SUBUNIT: Protochlorophyllide reductase is composed of three subunits;
CC       BchL, BchN and BchB. Forms a heterotetramer of two BchB and two BchN
CC       subunits. {ECO:0000255|HAMAP-Rule:MF_00353}.
CC   -!- SIMILARITY: Belongs to the ChlB/BchB/BchZ family. {ECO:0000255|HAMAP-
CC       Rule:MF_00353}.
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DR   EMBL; CP000283; ABE40956.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q132N3; -.
DR   SMR; Q132N3; -.
DR   STRING; 316057.RPD_3735; -.
DR   EnsemblBacteria; ABE40956; ABE40956; RPD_3735.
DR   KEGG; rpd:RPD_3735; -.
DR   eggNOG; COG2710; Bacteria.
DR   HOGENOM; CLU_025470_0_0_5; -.
DR   OMA; TTFQARD; -.
DR   OrthoDB; 363662at2; -.
DR   BioCyc; RPAL316057:RPD_RS18780-MON; -.
DR   UniPathway; UPA00671; -.
DR   Proteomes; UP000001818; Chromosome.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0016730; F:oxidoreductase activity, acting on iron-sulfur proteins as donors; IEA:InterPro.
DR   GO; GO:0016636; F:oxidoreductase activity, acting on the CH-CH group of donors, iron-sulfur protein as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0036070; P:light-independent bacteriochlorophyll biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0019685; P:photosynthesis, dark reaction; IEA:InterPro.
DR   Gene3D; 1.10.8.550; -; 1.
DR   HAMAP; MF_00353; ChlB_BchB; 1.
DR   InterPro; IPR013580; LI-POR_suB-like_C.
DR   InterPro; IPR000510; Nase/OxRdtase_comp1.
DR   InterPro; IPR042298; P-CP_red_C.
DR   InterPro; IPR005969; Protochl_reductB.
DR   InterPro; IPR016209; Protochlorophyllide_Rdtase.
DR   Pfam; PF00148; Oxidored_nitro; 1.
DR   Pfam; PF08369; PCP_red; 1.
DR   PIRSF; PIRSF000163; PCP_ChlB; 1.
DR   TIGRFAMs; TIGR01278; DPOR_BchB; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; ATP-binding; Bacteriochlorophyll biosynthesis;
KW   Chlorophyll biosynthesis; Iron; Iron-sulfur; Metal-binding;
KW   Nucleotide-binding; Oxidoreductase; Photosynthesis.
FT   CHAIN           1..535
FT                   /note="Light-independent protochlorophyllide reductase
FT                   subunit B"
FT                   /id="PRO_1000048420"
FT   ACT_SITE        287
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
FT   BINDING         36
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared with heterodimeric partner"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
FT   BINDING         422..423
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
SQ   SEQUENCE   535 AA;  58070 MW;  B2704941F0981C9A CRC64;
     MQLTVWTYEG PPHVGAMRVA TGMEGLHYVL HAPQGDTYAD LLFTMIERRN KRPPVTYTTF
     AARDLGKDTA ELFMKAARDA YERFKPQAMI VGASCTGSLI QDDPGGLAKS LGFPIPVVAI
     DLPAYQRKEN WGAAETLYQL VRALAGPKAP APGAKRPERA PGVRPTCNLL GPTALGFRHR
     DDITEITGLL GKLGIDVNVV APMGATPADI ARLGDADFNV VMYPEIAGQA ASWLHRIFHQ
     PFTKTVPIGV SATRDFIKEV AQLAGVDATA VLEAASTRLP WYSHSVDSTY LTNKRVFIFG
     DATHAIAAAR IASEELGFKV VGLGSYSREF GRELREAAKH YDVEPLITDD YLEVEAKVAE
     LHPELVLGTQ MERHIAKRLG VPCAVISAPV HVQDFPARYA PQMGFEGANV IFDTWVHPLM
     MGLEEHLLTM FKDDFEFKDG AMPSHLGTGH AAPVAEVIAE SAPPAVAATA PEIVSVANAA
     ASAAVWAPEA EKELQKIPFF VRGKARRNTE RFANENGVAT ITVETLYDAK AHFAR
 
 
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