ID A0A1X7IJZ2_9RHOB Unreviewed; 429 AA.
AC A0A1X7IJZ2;
DT 05-JUL-2017, integrated into UniProtKB/TrEMBL.
DT 05-JUL-2017, sequence version 1.
DT 27-MAR-2024, entry version 24.
DE RecName: Full=Hydrogenobyrinate a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
DE EC=6.3.5.9 {ECO:0000256|HAMAP-Rule:MF_00027};
DE AltName: Full=Hydrogenobyrinic acid a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
GN Name=cobB {ECO:0000256|HAMAP-Rule:MF_00027};
GN ORFNames=SAMN02746000_00760 {ECO:0000313|EMBL:SMG14796.1};
OS Paracoccus sp. J56.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Paracoccaceae; Paracoccus.
OX NCBI_TaxID=935850 {ECO:0000313|EMBL:SMG14796.1, ECO:0000313|Proteomes:UP000193912};
RN [1] {ECO:0000313|Proteomes:UP000193912}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=J56 {ECO:0000313|Proteomes:UP000193912};
RA Varghese N., Submissions S.;
RL Submitted (APR-2017) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the ATP-dependent amidation of the two carboxylate
CC groups at positions a and c of hydrogenobyrinate, using either L-
CC glutamine or ammonia as the nitrogen source. {ECO:0000256|HAMAP-
CC Rule:MF_00027}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 ATP + 2 H2O + hydrogenobyrinate + 2 L-glutamine = 2 ADP + 2
CC H(+) + hydrogenobyrinate a,c-diamide + 2 L-glutamate + 2 phosphate;
CC Xref=Rhea:RHEA:12544, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29985, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58359, ChEBI:CHEBI:77873, ChEBI:CHEBI:77874,
CC ChEBI:CHEBI:456216; EC=6.3.5.9; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_00027};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|ARBA:ARBA00001946,
CC ECO:0000256|HAMAP-Rule:MF_00027};
CC -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC cob(II)yrinate a,c-diamide from precorrin-2 (aerobic route): step 9/10.
CC {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- DOMAIN: Comprises of two domains. The C-terminal domain contains the
CC binding site for glutamine and catalyzes the hydrolysis of this
CC substrate to glutamate and ammonia. The N-terminal domain is
CC anticipated to bind ATP and hydrogenobyrinate and catalyzes the
CC ultimate synthesis of the diamide product. The ammonia produced via the
CC glutaminase domain is probably translocated to the adjacent domain via
CC a molecular tunnel, where it reacts with an activated intermediate.
CC {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- MISCELLANEOUS: The a and c carboxylates of hydrogenobyrinate are
CC activated for nucleophilic attack via formation of a phosphorylated
CC intermediate by ATP. CobB catalyzes first the amidation of the c-
CC carboxylate, and then that of the a-carboxylate. {ECO:0000256|HAMAP-
CC Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CbiA family. {ECO:0000256|HAMAP-
CC Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CobQ family. CobQ subfamily.
CC {ECO:0000256|ARBA:ARBA00006205}.
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DR EMBL; FXAQ01000003; SMG14796.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1X7IJZ2; -.
DR STRING; 935850.SAMN02746000_00760; -.
DR UniPathway; UPA00148; UER00220.
DR Proteomes; UP000193912; Unassembled WGS sequence.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0042242; F:cobyrinic acid a,c-diamide synthase activity; IEA:InterPro.
DR GO; GO:0043802; F:hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolysing) activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009236; P:cobalamin biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-UniRule.
DR CDD; cd05388; CobB_N; 1.
DR Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 2.
DR HAMAP; MF_00027; CobB_CbiA; 1.
DR InterPro; IPR004484; CbiA/CobB_synth.
DR InterPro; IPR029062; Class_I_gatase-like.
DR InterPro; IPR002586; CobQ/CobB/MinD/ParA_Nub-bd_dom.
DR InterPro; IPR011698; GATase_3.
DR InterPro; IPR027417; P-loop_NTPase.
DR NCBIfam; TIGR00379; cobB; 1.
DR PANTHER; PTHR43873; COBYRINATE A,C-DIAMIDE SYNTHASE; 1.
DR PANTHER; PTHR43873:SF1; COBYRINATE A,C-DIAMIDE SYNTHASE; 1.
DR Pfam; PF01656; CbiA; 1.
DR Pfam; PF07685; GATase_3; 1.
DR SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 1.
DR SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
DR PROSITE; PS51274; GATASE_COBBQ; 1.
PE 3: Inferred from homology;
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_00027}; Cobalamin biosynthesis {ECO:0000256|HAMAP-Rule:MF_00027};
KW Glutamine amidotransferase {ECO:0000256|ARBA:ARBA00022962,
KW ECO:0000256|HAMAP-Rule:MF_00027};
KW Ligase {ECO:0000256|ARBA:ARBA00022598, ECO:0000256|HAMAP-Rule:MF_00027};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_00027};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_00027}; Reference proteome {ECO:0000313|Proteomes:UP000193912}.
FT DOMAIN 5..190
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 243..425
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT ACT_SITE 325
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 423
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 429 AA; 45112 MW; 91F10DAB671CA92F CRC64;
MKGLVISAPA SGSGKTTVTL GLIGALRARG LTVQPFKSGP DYIDPAFHRR AAGRDSFNLD
SWAMGRAQIA HLIARTSDAD LAIAEGSMGL FDGVAQRGGC GNGASADIAA LTGWPVVLVL
DCKGQAQSAG AVALGFREMR RDVELAGVVL NRVASSRHEM LMRHALDPLG IPVLGVLPRE
AGIELPERHL GLVQAQELAA LDSLLAAAAA AARLHLDLDA IIAAAGGGVV AGPFSPLPPP
AQRIALAQDE AFSFVYPHLI QGWRTAGAEI LPFSPLADQP PDDSAGACWL PGGYPELHAG
RLAMAERFRA GLQRFSQTRP VHGECGGYMA MGAGLVDAQG VRHQMAGLLG LETSYEKRRM
HLGYRRAQPL AGLYRQPLAG HEFHYATILA QPDEPLAQVT DANGDRVAET GSRRGHATGT
FFHLIGEAP
//
