ID T0JJH2_9FIRM Unreviewed; 465 AA.
AC T0JJH2;
DT 16-OCT-2013, integrated into UniProtKB/TrEMBL.
DT 16-OCT-2013, sequence version 1.
DT 27-MAR-2024, entry version 45.
DE RecName: Full=Cobyrinate a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
DE EC=6.3.5.11 {ECO:0000256|HAMAP-Rule:MF_00027};
DE AltName: Full=Cobyrinic acid a,c-diamide synthetase {ECO:0000256|HAMAP-Rule:MF_00027};
GN Name=cbiA {ECO:0000256|HAMAP-Rule:MF_00027};
GN ORFNames=UNSWDHB_223 {ECO:0000313|EMBL:EQB22443.1};
OS Dehalobacter sp. UNSWDHB.
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Desulfitobacteriaceae;
OC Dehalobacter.
OX NCBI_TaxID=1339256 {ECO:0000313|EMBL:EQB22443.1, ECO:0000313|Proteomes:UP000015814};
RN [1] {ECO:0000313|EMBL:EQB22443.1, ECO:0000313|Proteomes:UP000015814}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=UNSWDHB {ECO:0000313|EMBL:EQB22443.1,
RC ECO:0000313|Proteomes:UP000015814};
RX PubMed=24051315;
RA Deshpande N.P., Wong Y.K., Manefield M., Wilkins M.R., Lee M.;
RT "Genome Sequence of Dehalobacter UNSWDHB, a Chloroform-Dechlorinating
RT Bacterium.";
RL Genome Announc. 1:e00720-13(2013).
CC -!- FUNCTION: Catalyzes the ATP-dependent amidation of the two carboxylate
CC groups at positions a and c of cobyrinate, using either L-glutamine or
CC ammonia as the nitrogen source. {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 ATP + cob(II)yrinate + 2 H2O + 2 L-glutamine = 2 ADP +
CC cob(II)yrinate a,c diamide + 2 H(+) + 2 L-glutamate + 2 phosphate;
CC Xref=Rhea:RHEA:26289, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29985, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58359, ChEBI:CHEBI:58537, ChEBI:CHEBI:58894,
CC ChEBI:CHEBI:456216; EC=6.3.5.11; 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 sirohydrochlorin (anaerobic route):
CC step 10/10. {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 cobyrinate and catalyzes the ultimate
CC 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 cobyrinate are activated for
CC nucleophilic attack via formation of a phosphorylated intermediate by
CC ATP. CbiA catalyzes first the amidation of the c-carboxylate, and then
CC that of the a-carboxylate. {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CbiA family. {ECO:0000256|HAMAP-
CC Rule:MF_00027}.
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:EQB22443.1}.
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DR EMBL; AUUR01000044; EQB22443.1; -; Genomic_DNA.
DR AlphaFoldDB; T0JJH2; -.
DR PATRIC; fig|1339256.3.peg.398; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000015814; 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: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 CDD; cd03130; GATase1_CobB; 1.
DR Gene3D; 3.40.50.880; -; 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}.
FT DOMAIN 13..197
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 254..448
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT ACT_SITE 337
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 443
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 465 AA; 52103 MW; 87B4DB3D011F7E04 CRC64;
MANLDRMNCP RFVLAGTNSG VGKTTITLGL LNGFRRKGIN VQPFKSGPDY IDPAFHTFVT
GNPSRNLDTW LIQENPIEYL MQQTGVNKDL SIIEGVMGFY DGHIVHKNVG STAHLSKVLK
APVVLIINGS GISTSAAAIV HGFKHFDNDV DVAGVIINQV NSKRHYDILK EAIEEMTGVK
CFGYLKKHPD INLDSRHLGL IPSYEVEVLQ DKIDLISNLM EDSIDFDGLL ELGQSAAPLK
RVDLGIKKVV DEVRIGVPLD KAFNFYYQDN LELLEALGAK LVYFSPLEDK AVPASIDGIY
FGGGFPEVFV KELSANKQMR TSIKEFIEAG GPVYAECGGL MYMCNRIVDL EDNAYEMVGI
LENDSVMTKK LQRFGYVDVR INKESIIGSD MTNFEAHEFH RSKLTEHLDD QTVYSVEKDR
GNGNINKWSC GYTYKNFLGG YAHIHFYNNL EIPRNFLYTC EKRKK
//
