ID A0A099T6D7_9RHOB Unreviewed; 520 AA.
AC A0A099T6D7;
DT 07-JAN-2015, integrated into UniProtKB/TrEMBL.
DT 07-JAN-2015, sequence version 1.
DT 24-JAN-2024, entry version 34.
DE RecName: Full=Light-independent protochlorophyllide reductase subunit B {ECO:0000256|HAMAP-Rule:MF_00353};
DE Short=DPOR subunit B {ECO:0000256|HAMAP-Rule:MF_00353};
DE Short=LI-POR subunit B {ECO:0000256|HAMAP-Rule:MF_00353};
DE EC=1.3.7.7 {ECO:0000256|HAMAP-Rule:MF_00353};
GN Name=bchB {ECO:0000256|HAMAP-Rule:MF_00353};
GN ORFNames=PM04_13005 {ECO:0000313|EMBL:KGL00668.1};
OS Thalassobacter sp. 16PALIMAR09.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Roseobacteraceae; Thalassobacter.
OX NCBI_TaxID=1225651 {ECO:0000313|EMBL:KGL00668.1, ECO:0000313|Proteomes:UP000029829};
RN [1] {ECO:0000313|EMBL:KGL00668.1, ECO:0000313|Proteomes:UP000029829}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=16PALIMAR09 {ECO:0000313|EMBL:KGL00668.1,
RC ECO:0000313|Proteomes:UP000029829};
RA Mas-Llado M., Nogales B., Bosch R.;
RT "Draft genome sequence of Thalassobacter sp. 16PALIMAR09.";
RL Submitted (MAR-2014) 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:0000256|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:0000256|HAMAP-Rule:MF_00353};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000256|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:0000256|HAMAP-Rule:MF_00353};
CC -!- PATHWAY: Porphyrin-containing compound metabolism; bacteriochlorophyll
CC biosynthesis (light-independent). {ECO:0000256|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:0000256|HAMAP-Rule:MF_00353}.
CC -!- SIMILARITY: Belongs to the ChlB/BchB/BchZ family. {ECO:0000256|HAMAP-
CC Rule:MF_00353}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:KGL00668.1}.
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DR EMBL; JHAK01000006; KGL00668.1; -; Genomic_DNA.
DR RefSeq; WP_038007414.1; NZ_JHAK01000006.1.
DR AlphaFoldDB; A0A099T6D7; -.
DR OrthoDB; 5717231at2; -.
DR UniPathway; UPA00671; -.
DR Proteomes; UP000029829; Unassembled WGS sequence.
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; 1.20.89.20; -; 1.
DR Gene3D; 3.40.50.1980; Nitrogenase molybdenum iron protein domain; 3.
DR Gene3D; 1.10.8.550; Proto-chlorophyllide reductase 57 kD subunit B; 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 NCBIfam; TIGR01278; DPOR_BchB; 1.
DR PANTHER; PTHR33712; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT B; 1.
DR PANTHER; PTHR33712:SF7; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT B; 1.
DR Pfam; PF00148; Oxidored_nitro; 1.
DR Pfam; PF08369; PCP_red; 1.
DR PIRSF; PIRSF000163; PCP_ChlB; 1.
DR SUPFAM; SSF53807; Helical backbone' metal receptor; 1.
PE 3: Inferred from homology;
KW 4Fe-4S {ECO:0000256|ARBA:ARBA00022485, ECO:0000256|HAMAP-Rule:MF_00353};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Bacteriochlorophyll biosynthesis {ECO:0000256|ARBA:ARBA00023181,
KW ECO:0000256|HAMAP-Rule:MF_00353};
KW Chlorophyll biosynthesis {ECO:0000256|ARBA:ARBA00023171, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_00353};
KW Iron-sulfur {ECO:0000256|ARBA:ARBA00023014, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP-
KW Rule:MF_00353};
KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP-
KW Rule:MF_00353}; Reference proteome {ECO:0000313|Proteomes:UP000029829}.
FT DOMAIN 12..405
FT /note="Nitrogenase/oxidoreductase component 1"
FT /evidence="ECO:0000259|Pfam:PF00148"
FT DOMAIN 471..515
FT /note="Light-independent protochlorophyllide reductase
FT subunit B-like C-terminal"
FT /evidence="ECO:0000259|Pfam:PF08369"
FT REGION 426..462
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 426..443
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 274
FT /note="Proton donor"
FT /evidence="ECO:0000256|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:0000256|HAMAP-Rule:MF_00353"
FT BINDING 409..410
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00353"
SQ SEQUENCE 520 AA; 57774 MW; 3DCAA989AC606E88 CRC64;
MKLTVWTYEG PPHVGAMRVA TGMKGLHYVL HAPQGDTYAD LLFTMIERRN HRPPVTYTTF
QARDLGADTA YLFKDACRQA YERFKPEALI VGASCTAELI QDDPGGLAET MGLPVPVIAL
DLPSYSRKEN FGTDETFYQL VRALAKPMER TARPTANIIG PTGLGFRHRD DVEELTGLLS
EMGVDVNVVA PMGATPTDLT RLGAAHFNVL LYPEHAETAA RYMEKELGQP FTKTVPIGVN
ATREFLAEVG EITGLDPKVD ESRLRQPWWS KSVDSTYLTG KRVFVFGDAT HVKASVRIAR
EEMGFEVVGL GCYNREFARD IRALGKEIGV PALISDDYLE VEKAIEDASP EMILGTQMER
HIGKRLGIPC AVISAPVHVQ DFPARYSPQV GFEGANVIFD TWIHPLVMGL EEHLLAMFRE
DFEFHDEAGP SHHGGHAPRP EEKVHTGGQP PAPRDIEEPK SDNLGSDVMV WLADAEKELK
KIPFFVRGKA KRNTEKYAAE KGMTQISKDT LYEAKAHYAR
//
