BCHB_PROA2
ID BCHB_PROA2 Reviewed; 533 AA.
AC B4S592;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 23-SEP-2008, sequence version 1.
DT 03-AUG-2022, entry version 67.
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=Paes_2028;
OS Prosthecochloris aestuarii (strain DSM 271 / SK 413).
OC Bacteria; Chlorobi; Chlorobia; Chlorobiales; Chlorobiaceae;
OC Prosthecochloris.
OX NCBI_TaxID=290512;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 271 / SK 413;
RG US DOE Joint Genome Institute;
RA Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Bruce D., Goodwin L., Pitluck S., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Anderson I., Liu Z., Li T., Zhao F., Overmann J.,
RA Bryant D.A., Richardson P.;
RT "Complete sequence of chromosome of Prosthecochloris aestuarii DSM 271.";
RL Submitted (JUN-2008) 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; CP001108; ACF47038.1; -; Genomic_DNA.
DR RefSeq; WP_012506571.1; NC_011059.1.
DR AlphaFoldDB; B4S592; -.
DR SMR; B4S592; -.
DR STRING; 290512.Paes_2028; -.
DR EnsemblBacteria; ACF47038; ACF47038; Paes_2028.
DR KEGG; paa:Paes_2028; -.
DR eggNOG; COG2710; Bacteria.
DR HOGENOM; CLU_025470_0_0_10; -.
DR OMA; TTFQARD; -.
DR OrthoDB; 363662at2; -.
DR UniPathway; UPA00671; -.
DR Proteomes; UP000002725; 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..533
FT /note="Light-independent protochlorophyllide reductase
FT subunit B"
FT /id="PRO_1000120533"
FT ACT_SITE 292
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 428..429
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00353"
SQ SEQUENCE 533 AA; 59096 MW; 44E60A535D89F1A5 CRC64;
MRLAFWLYEG TALHGISRVT NSMKDVHTVY HAPQGDDYIT ATYTMLERTP QFPGLSISVV
RGQDLARGES RLPATLQQVE EHYNPRMIVV APSCSTALLQ EDLEQLSRHS GVDPDKILVY
DVNPFRVQEH EAAEGLFTEL VKRSAQPQTL TEQPSVNLLG FTSLGFHLRS DLTSLRRILK
TLGITINVVA PWGASMDDLS RLPSAWVNVV PYHEMGNGAA RYLREKFGMP ILSGAPMGVN
PTLKWIEDLL AQINDIARER GLPLLDMPDL TEFSLDGLSA PSGVPWFART ADMESFSGKR
AFVFGDATHT VGMVKFLKDE LGMQIIGAGT YLSRHADWVR SELEGYLPEP LIVTDKFQEI
SKKIEDEMPE LVCGTQMERH SCRKLDVPCM VISTPTHIED HLIAYYPILG FEGADILADR
VYTSCKLGLE KHLIDFFGDA GLEYEDDEEA VGLSTNGHAA AETETSIAGE AATVVSAEGD
GMPWTDDAEK MLKKVPFFVR KKVRKNTENY AREIGETTIS GDVFRKAKEA LGG
