ID A0A0N8KR21_9EURY Unreviewed; 447 AA.
AC A0A0N8KR21;
DT 20-JAN-2016, integrated into UniProtKB/TrEMBL.
DT 20-JAN-2016, sequence version 1.
DT 27-MAR-2024, entry version 36.
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};
DE AltName: Full=Ni-sirohydrochlorin a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
DE EC=6.3.5.12 {ECO:0000256|HAMAP-Rule:MF_00027};
DE AltName: Full=Ni-sirohydrochlorin a,c-diamide synthetase {ECO:0000256|HAMAP-Rule:MF_00027};
GN Name=cbiA1 {ECO:0000313|EMBL:KPQ43722.1};
GN Synonyms=cbiA {ECO:0000256|HAMAP-Rule:MF_00027}, cfbB
GN {ECO:0000256|HAMAP-Rule:MF_00027};
GN ORFNames=MPEBLZ_01711 {ECO:0000313|EMBL:KPQ43722.1};
OS Candidatus Methanoperedens sp. BLZ1.
OC Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC Methanosarcinales; Candidatus Methanoperedenaceae; Methanoperedens.
OX NCBI_TaxID=1719120 {ECO:0000313|EMBL:KPQ43722.1, ECO:0000313|Proteomes:UP000050360};
RN [1] {ECO:0000313|EMBL:KPQ43722.1, ECO:0000313|Proteomes:UP000050360}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA Arshad A., Speth D.R., De Graaf R.M., Op Den Camp H.J., Jetten M.S.,
RA Welte C.U.;
RT "A metagenomics-based metabolic model of nitrate-dependent anaerobic
RT oxidation of methane by Methanoperedens-like archaea.";
RL Submitted (SEP-2015) 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. Involved in the biosynthesis of the
CC unique nickel-containing tetrapyrrole coenzyme F430, the prosthetic
CC group of methyl-coenzyme M reductase (MCR), which plays a key role in
CC methanogenesis and anaerobic methane oxidation. Catalyzes the ATP-
CC dependent amidation of the two carboxylate groups at positions a and c
CC of Ni-sirohydrochlorin, using L-glutamine or ammonia as the nitrogen
CC source. {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 ATP + 2 H2O + 2 L-glutamine + Ni-sirohydrochlorin = 2 ADP +
CC 2 H(+) + 2 L-glutamate + Ni-sirohydrochlorin a,c-diamide + 2
CC phosphate; Xref=Rhea:RHEA:52896, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29985, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:58359, ChEBI:CHEBI:136841,
CC ChEBI:CHEBI:136887, ChEBI:CHEBI:456216; EC=6.3.5.12;
CC Evidence={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 or Ni-sirohydrochlorin, and
CC catalyzes the ultimate synthesis of the diamide product. The ammonia
CC produced via the glutaminase domain is probably translocated to the
CC adjacent domain via a molecular tunnel, where it reacts with an
CC activated intermediate. {ECO:0000256|HAMAP-Rule:MF_00027}.
CC -!- MISCELLANEOUS: The a and c carboxylates of cobyrinate and Ni-
CC sirohydrochlorin are activated for nucleophilic attack via formation of
CC a phosphorylated intermediate by ATP. CbiA catalyzes first the
CC amidation of the c-carboxylate, and then that of the a-carboxylate.
CC {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:KPQ43722.1}.
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DR EMBL; LKCM01000131; KPQ43722.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0N8KR21; -.
DR PATRIC; fig|1719120.3.peg.1868; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000050360; 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 GO; GO:0015948; P:methanogenesis; IEA:UniProtKB-KW.
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 Methanogenesis {ECO:0000256|HAMAP-Rule:MF_00027};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_00027}.
FT DOMAIN 9..192
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 245..432
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 426
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 447 AA; 48960 MW; 522183101EC228DA CRC64;
MVDKTKALLI AGTASGVGKT TVATGLMAAL GKNHKVQPFK VGPDFIDPGH HTQICGRPSR
NLDSFMMGER GVLETFARAS RGAEYCIIEG VMGLFDGLDA TEIASSAHIA KILDVPVLLV
INAHGVSRSI AAIVKGFSEF DRSVSIQGII LNNTGSDRHI KLIRDSLHGA GIKIPVIGAL
PGNKELSIPS RHLGLHMSGE NHPKTSERAN FIEQHINMDS VKIIAENFKP YDIDLKESNV
RFDVKIGIAN DRAFCFYYQD TFDSLKISGA ELIFFSPMSD RLPDVDGIYL GGGYPELFAK
ELEASGTRHE IKKAAEDGMP IYGECGALLY LCNSLKTDKA YKMAGVFGAS SRMTGKLQGL
GYTEAEAIMD SPIAKKGKLI RGHEFHYSIT ECDRDARLVY RLRRGKGIIE GRDGLIEHNT
MASYMHTHPA SNSFDEFLRQ CSKYKSR
//
