COBB_THEFY
ID COBB_THEFY Reviewed; 474 AA.
AC Q47T68;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 13-SEP-2005, sequence version 1.
DT 25-MAY-2022, entry version 109.
DE RecName: Full=Hydrogenobyrinate a,c-diamide synthase {ECO:0000255|HAMAP-Rule:MF_00027};
DE EC=6.3.5.9 {ECO:0000255|HAMAP-Rule:MF_00027};
DE AltName: Full=Hydrogenobyrinic acid a,c-diamide synthase {ECO:0000255|HAMAP-Rule:MF_00027};
GN Name=cobB {ECO:0000255|HAMAP-Rule:MF_00027}; OrderedLocusNames=Tfu_0311;
OS Thermobifida fusca (strain YX).
OC Bacteria; Actinobacteria; Streptosporangiales; Nocardiopsaceae;
OC Thermobifida.
OX NCBI_TaxID=269800;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=YX;
RX PubMed=17209016; DOI=10.1128/jb.01899-06;
RA Lykidis A., Mavromatis K., Ivanova N., Anderson I., Land M., DiBartolo G.,
RA Martinez M., Lapidus A., Lucas S., Copeland A., Richardson P., Wilson D.B.,
RA Kyrpides N.;
RT "Genome sequence and analysis of the soil cellulolytic actinomycete
RT Thermobifida fusca YX.";
RL J. Bacteriol. 189:2477-2486(2007).
CC -!- FUNCTION: Catalyzes the ATP-dependent amidation of the two carboxylate
CC groups at positions a and c of hydrogenobyrinate, using either L-
CC glutamine or ammonia as the nitrogen source. {ECO:0000255|HAMAP-
CC Rule:MF_00027}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 ATP + 2 H2O + hydrogenobyrinate + 2 L-glutamine = 2 ADP + 2
CC H(+) + hydrogenobyrinate a,c-diamide + 2 L-glutamate + 2 phosphate;
CC Xref=Rhea:RHEA:12544, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29985, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58359, ChEBI:CHEBI:77873, ChEBI:CHEBI:77874,
CC ChEBI:CHEBI:456216; EC=6.3.5.9; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00027};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00027};
CC -!- PATHWAY: Cofactor biosynthesis; adenosylcobalamin biosynthesis;
CC cob(II)yrinate a,c-diamide from precorrin-2 (aerobic route): step 9/10.
CC {ECO:0000255|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 hydrogenobyrinate and catalyzes the
CC ultimate 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:0000255|HAMAP-Rule:MF_00027}.
CC -!- MISCELLANEOUS: The a and c carboxylates of hydrogenobyrinate are
CC activated for nucleophilic attack via formation of a phosphorylated
CC intermediate by ATP. CobB catalyzes first the amidation of the c-
CC carboxylate, and then that of the a-carboxylate. {ECO:0000255|HAMAP-
CC Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CbiA family. {ECO:0000255|HAMAP-
CC Rule:MF_00027}.
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DR EMBL; CP000088; AAZ54349.1; -; Genomic_DNA.
DR RefSeq; WP_011290758.1; NC_007333.1.
DR AlphaFoldDB; Q47T68; -.
DR STRING; 269800.Tfu_0311; -.
DR EnsemblBacteria; AAZ54349; AAZ54349; Tfu_0311.
DR KEGG; tfu:Tfu_0311; -.
DR eggNOG; COG1797; Bacteria.
DR HOGENOM; CLU_022752_1_1_11; -.
DR OMA; QPFKCGP; -.
DR OrthoDB; 692368at2; -.
DR UniPathway; UPA00148; UER00220.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0042242; F:cobyrinic acid a,c-diamide synthase activity; IEA:InterPro.
DR GO; GO:0043802; F:hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolysing) 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-KW.
DR Gene3D; 3.40.50.300; -; 1.
DR Gene3D; 3.40.50.880; -; 1.
DR HAMAP; MF_00027; CobB_CbiA; 1.
DR InterPro; IPR004484; CbiA_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 PANTHER; PTHR43873; PTHR43873; 1.
DR Pfam; PF01656; CbiA; 1.
DR Pfam; PF07685; GATase_3; 1.
DR SUPFAM; SSF52317; SSF52317; 1.
DR SUPFAM; SSF52540; SSF52540; 1.
DR TIGRFAMs; TIGR00379; cobB; 1.
DR PROSITE; PS51274; GATASE_COBBQ; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cobalamin biosynthesis; Glutamine amidotransferase; Ligase;
KW Magnesium; Nucleotide-binding.
FT CHAIN 1..474
FT /note="Hydrogenobyrinate a,c-diamide synthase"
FT /id="PRO_1000002298"
FT DOMAIN 269..459
FT /note="GATase cobBQ-type"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
FT ACT_SITE 352
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
FT SITE 451
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
SQ SEQUENCE 474 AA; 48718 MW; 05C49D59D7A420D3 CRC64;
MSGDVPAAVL PRLVISAPTS GAGKTTVATG LMAALRAAGY DVSGHKAGPD YIDPGYHSLA
TGRPGRNLDV HLHGENLLGP LLLHGASHPR PADLAVIEGM MGLYDGKLGG RGFASTAHVA
ALLDAPVVLV VDVSHVSRSA AAIVAGMAVF DQRIRIAGVI LNRVGSRRHA AEVASAVEDV
GVPVLGALRH DSGLAVPSRH LGLVPAEERA EAVAAVELLA ERIAAQVDLT AVVEVARSAP
PLHAQAWSAQ EALRAAGFHP VSAQRDHPVV AVAGGQAFTF RYAEVEELLR AAGCRPVVFD
PMSDPALPDG TAGIYLGGGF PEVYAAELAG NTALRTALRD AVRSGVPTVA ECAGLLYLCR
DVDGAPMVGA LDAVGRMTSR LALGYYSALA PAETLVAAEG DRVPGHTFHR TTVTSTGEQA
GPAWLLDGQP DGFSSDPAGI GRPTLHASYL HTHWAGCPQA AARFAAAVST QRPC
