ID D9QVW9_ACEAZ Unreviewed; 462 AA.
AC D9QVW9;
DT 05-OCT-2010, integrated into UniProtKB/TrEMBL.
DT 05-OCT-2010, sequence version 1.
DT 27-MAR-2024, entry version 71.
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 OrderedLocusNames=Acear_0843 {ECO:0000313|EMBL:ADL12378.1};
OS Acetohalobium arabaticum (strain ATCC 49924 / DSM 5501 / Z-7288).
OC Bacteria; Bacillota; Clostridia; Halanaerobiales; Halobacteroidaceae;
OC Acetohalobium.
OX NCBI_TaxID=574087 {ECO:0000313|EMBL:ADL12378.1, ECO:0000313|Proteomes:UP000001661};
RN [1] {ECO:0000313|EMBL:ADL12378.1, ECO:0000313|Proteomes:UP000001661}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 49924 / DSM 5501 / Z-7288
RC {ECO:0000313|Proteomes:UP000001661};
RX PubMed=21304692;
RA Sikorski J., Lapidus A., Chertkov O., Lucas S., Copeland A.,
RA Glavina Del Rio T., Nolan M., Tice H., Cheng J.F., Han C., Brambilla E.,
RA Pitluck S., Liolios K., Ivanova N., Mavromatis K., Mikhailova N., Pati A.,
RA Bruce D., Detter C., Tapia R., Goodwin L., Chen A., Palaniappan K.,
RA Land M., Hauser L., Chang Y.J., Jeffries C.D., Rohde M., Goker M.,
RA Spring S., Woyke T., Bristow J., Eisen J.A., Markowitz V., Hugenholtz P.,
RA Kyrpides N.C., Klenk H.P.;
RT "Complete genome sequence of Acetohalobium arabaticum type strain (Z-
RT 7288).";
RL Stand. Genomic Sci. 3:57-65(2010).
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; CP002105; ADL12378.1; -; Genomic_DNA.
DR RefSeq; WP_013277824.1; NC_014378.1.
DR AlphaFoldDB; D9QVW9; -.
DR STRING; 574087.Acear_0843; -.
DR KEGG; aar:Acear_0843; -.
DR eggNOG; COG1797; Bacteria.
DR HOGENOM; CLU_022752_2_0_9; -.
DR OrthoDB; 9764035at2; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000001661; 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}; Reference proteome {ECO:0000313|Proteomes:UP000001661}.
FT DOMAIN 5..190
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 250..442
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT ACT_SITE 332
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 436
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 462 AA; 50661 MW; E951576CB7D1A144 CRC64;
MQPRVVIAGT QSGVGKTTLA TGLMAAMTKK GYDVQPYKVG PDYIDPGFHT AATERISRNL
DSWMVSSDKL IELFDRNSQG ADISIIEGVM GLFDGHRVDE GDGSTAEVAK ILSAPVILII
DAGKMAQSGA ALAYGYKHYD SELNLAGVIL NRVSSDSHYQ ILKEPIEELG ISVLGYIPRQ
ESLELPERHL GLVPTSETSQ MDDYIDDLAE VILQNLDLKE LYNLAAETEE VEVKKKTLFS
QTGPVSEVKL AVARDEAFNF YYEDNLDLLE ENGVELEYFS PVFDTALPED IAGLYIGGGF
PESFLAELSD NQSMQKSIKE AIVAGMPVYA ECGGLMYLTE AITDFEGETH SMVGSISGRI
EMTDRLQAMG YAEAEVKEDN ILLNQGDKVR GHEFHYSRLV SLPEDTTYAY RLTGGKGRDN
RAGGILKDNL LASYLHLHFA SNPAVIDNLI DSCLKFIEGS SY
//
