BCHB_ROSS1
ID BCHB_ROSS1 Reviewed; 568 AA.
AC A5UUJ5;
DT 18-MAR-2008, integrated into UniProtKB/Swiss-Prot.
DT 10-JUL-2007, sequence version 1.
DT 03-AUG-2022, entry version 80.
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=RoseRS_1909;
OS Roseiflexus sp. (strain RS-1).
OC Bacteria; Chloroflexi; Chloroflexia; Chloroflexales; Roseiflexineae;
OC Roseiflexaceae; Roseiflexus.
OX NCBI_TaxID=357808;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=RS-1;
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 Chertkov O., Brettin T., Bruce D., Han C., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Mikhailova N., Bryant D.A., Richardson P.;
RT "Complete sequence of Roseiflexus sp. RS-1.";
RL Submitted (APR-2007) 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; CP000686; ABQ90298.1; -; Genomic_DNA.
DR RefSeq; WP_011956644.1; NC_009523.1.
DR AlphaFoldDB; A5UUJ5; -.
DR SMR; A5UUJ5; -.
DR STRING; 357808.RoseRS_1909; -.
DR EnsemblBacteria; ABQ90298; ABQ90298; RoseRS_1909.
DR KEGG; rrs:RoseRS_1909; -.
DR eggNOG; COG2710; Bacteria.
DR HOGENOM; CLU_025470_0_0_0; -.
DR OMA; TTFQARD; -.
DR OrthoDB; 363662at2; -.
DR UniPathway; UPA00671; -.
DR Proteomes; UP000006554; 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; Reference proteome.
FT CHAIN 1..568
FT /note="Light-independent protochlorophyllide reductase
FT subunit B"
FT /id="PRO_0000324044"
FT REGION 476..517
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 497..517
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 293
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 437..438
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
SQ SEQUENCE 568 AA; 62276 MW; 5F991543F7C893E1 CRC64;
MRLALWMYQG TAHHGVGRIA NSMRGVHAVF HAPQGDDYVN PIFTMLERTP DFPRMTTSIV
SGRDLAQGTV RLPETLRAVD AQVHPDLIIV CASCSTILLQ EDLERMARSA GTSAEVLVYD
ANPYRMQEVR SADGLLTTLV QRFARPQAPL PTPSVNILGP ASLGFHNRSD LICLRRMLAT
LGVQINVVAP LGASIHDLER LPAAWATIAP YRELGQNAAR WLEDQFGIPA LTDAPIGVQP
TLRWLRRLVE TLNEAGARLQ RLSTPLRLPP LTAFSLDGMS APSSVPWFAR TADMESYSMK
RAFVFGDATH TVGMVKFLRD ELGMQIAGAG TYLEEEAEWV YQELKEYLPP DDSGSPKSSF
LATDVFQHVA RRIADLSPEL VCGTQMERHA CRKLDIPCLV IAPPTHIENH LLSYRPVLGF
DGADVLADAV YTTATLGMEK HLIDMFGDAG LDYDEPQTGE PRTENQELRV ENRASANGHP
EAGVSVGAAE PSAAPSRSVV TEESNRATTP SSSTVHPVWT PDAQAMLKKI PFFVRGRVQK
NVERYAMQHG YATITAEVLV EAREALGG
