ID I0GSP1_SELRL Unreviewed; 465 AA.
AC I0GSP1;
DT 13-JUN-2012, integrated into UniProtKB/TrEMBL.
DT 13-JUN-2012, sequence version 1.
DT 27-MAR-2024, entry version 62.
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 ECO:0000313|EMBL:BAL83778.1};
GN OrderedLocusNames=SELR_20700 {ECO:0000313|EMBL:BAL83778.1};
OS Selenomonas ruminantium subsp. lactilytica (strain NBRC 103574 / TAM6421).
OC Bacteria; Bacillota; Negativicutes; Selenomonadales; Selenomonadaceae;
OC Selenomonas.
OX NCBI_TaxID=927704 {ECO:0000313|EMBL:BAL83778.1, ECO:0000313|Proteomes:UP000007887};
RN [1] {ECO:0000313|EMBL:BAL83778.1, ECO:0000313|Proteomes:UP000007887}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NBRC 103574 / TAM6421 {ECO:0000313|Proteomes:UP000007887};
RA Oguchi A., Ankai A., Kaneko J., Yamada-Narita S., Fukui S., Takahashi M.,
RA Onodera T., Kojima S., Fushimi T., Abe N., Kamio Y., Yamazaki S.,
RA Fujita N.;
RT "Whole genome sequence of Selenomonas ruminantium subsp. lactilytica
RT TAM6421.";
RL Submitted (OCT-2011) 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 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}.
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DR EMBL; AP012292; BAL83778.1; -; Genomic_DNA.
DR RefSeq; WP_014425208.1; NC_017068.1.
DR AlphaFoldDB; I0GSP1; -.
DR KEGG; sri:SELR_20700; -.
DR PATRIC; fig|927704.6.peg.2146; -.
DR eggNOG; COG1797; Bacteria.
DR HOGENOM; CLU_022752_2_0_9; -.
DR OrthoDB; 9764035at2; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000007887; Chromosome.
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 10..193
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 248..438
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT ACT_SITE 330
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 434
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 465 AA; 50362 MW; 1B57964B81326383 CRC64;
MKTLKNIPRL VIAATQSGAG KTTIVTGLLA ALRQKGLQVQ SFKAGPDYID PGYHALASGR
PAHNLDSWLT PAEVLPEILA TEAADADIAI IEGVMGLYDG GRLGISSTAE IAKLIQAPVL
LVIDAKSMGA SAAAIAQGFR DYDKEVQLAG VIVNRLGSAT HEAMIREAMA GIGMEVFGAL
HRDETLHMPE RHLGLLPVEE NQERELIDHM GQAVGKSLEL DKLLVLARKA APLPVAVTES
RENAHRCRIG VARDEAFSFY YPASIKVLER QGAEIVPFSP LHDKALPDVD GLFIGGGFPE
MFAAELMANA DLRREIRQQA EAGMPMLAEC GGYMYLLESL QDFAGQVYEM AGVFAGQAVM
KEKLQMVGYV EAELQQDSLL GKAGVKLKGH EFHFSTEREP VKPDMAPFVF RKLRNDSRYP
AGQQVNHALG SYLHLHFAGC PEAAASFAQQ CADYGKKRGH HDGEI
//
