ID A0A218QBP1_9CYAN Unreviewed; 472 AA.
AC A0A218QBP1;
DT 27-SEP-2017, integrated into UniProtKB/TrEMBL.
DT 27-SEP-2017, sequence version 1.
DT 27-MAR-2024, entry version 25.
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=NIES4075_02750 {ECO:0000313|EMBL:GAX39323.1};
OS Tolypothrix sp. NIES-4075.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Tolypothrichaceae;
OC Tolypothrix.
OX NCBI_TaxID=2005459 {ECO:0000313|EMBL:GAX39323.1, ECO:0000313|Proteomes:UP000198313};
RN [1] {ECO:0000313|EMBL:GAX39323.1, ECO:0000313|Proteomes:UP000198313}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NIES-4075 {ECO:0000313|EMBL:GAX39323.1,
RC ECO:0000313|Proteomes:UP000198313};
RA Hirose Y., Shimura Y., Fujisawa T., Nakamura Y., Kawachi M.;
RT "Genome sequencing of cyanobaciteial culture collection at National
RT Institute for Environmental Studies (NIES).";
RL Submitted (JUN-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 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:GAX39323.1}.
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DR EMBL; BDUC01000001; GAX39323.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A218QBP1; -.
DR OrthoDB; 9764035at2; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000198313; 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; 1.
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:UP000198313}.
FT DOMAIN 3..201
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 265..454
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT ACT_SITE 347
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 450
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 472 AA; 51837 MW; 57424B47D1E8E370 CRC64;
MPLVIAGERS GVGKTTVTLT LLASLCRRGK IVQSFKVGPD YIDPMFHQHV TGRACRNLDP
VLTSEAYVQE CFACHIQEVD FALVEGVMGL FDGIKGTKQD SSQSPIPSPQ SPIASTAHIA
RLLDLPVVLV IDCSRLSGSV AAIAYGYCSF DPRIKIAGVV LNRVGSDRHL SLLKDSLEPL
QLPIIGVLRR EDDITIPDRH LGLIPTAELP QLNAVIERLA DLGDTCFDWD RLLPLLGTRD
WGQGDKGDKG GFSSSKIPNP RAKIRVAVAR DRAFNFYYQD NLDLLQELGA ELIFWSPLED
ALPKNVQGMY FGGGFPEVFA EQLAENTSAR EAVKCAIVAG IPTIAECGGL MYLCEEIVDF
QGKSWSMVGV LPTKSVMGGR LTLGYRRAVA LQDNLLVDAG ATIYGHEFHR SRLIPEPNLP
LFQTYRCDSK EATGDEGWSL PMNLYASYIH MHWGACPEIP QRFLAQCMKV AF
//
