ID D9XRC7_9ACTN Unreviewed; 485 AA.
AC D9XRC7;
DT 05-OCT-2010, integrated into UniProtKB/TrEMBL.
DT 05-OCT-2010, sequence version 1.
DT 27-MAR-2024, entry version 68.
DE RecName: Full=Hydrogenobyrinate a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
DE EC=6.3.5.9 {ECO:0000256|HAMAP-Rule:MF_00027};
DE AltName: Full=Hydrogenobyrinic acid a,c-diamide synthase {ECO:0000256|HAMAP-Rule:MF_00027};
GN Name=cobB {ECO:0000256|HAMAP-Rule:MF_00027};
GN ORFNames=SSRG_04878 {ECO:0000313|EMBL:EFL42074.1};
OS Streptomyces griseoflavus Tu4000.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Streptomyces.
OX NCBI_TaxID=467200 {ECO:0000313|EMBL:EFL42074.1, ECO:0000313|Proteomes:UP000002968};
RN [1] {ECO:0000313|EMBL:EFL42074.1}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Tu4000 {ECO:0000313|EMBL:EFL42074.1};
RG The Broad Institute Genome Sequencing Platform;
RG Broad Institute Microbial Sequencing Center;
RA Fischbach M., Godfrey P., Ward D., Young S., Zeng Q., Koehrsen M.,
RA Alvarado L., Berlin A.M., Bochicchio J., Borenstein D., Chapman S.B.,
RA Chen Z., Engels R., Freedman E., Gellesch M., Goldberg J., Griggs A.,
RA Gujja S., Heilman E.R., Heiman D.I., Hepburn T.A., Howarth C., Jen D.,
RA Larson L., Lewis B., Mehta T., Park D., Pearson M., Richards J.,
RA Roberts A., Saif S., Shea T.D., Shenoy N., Sisk P., Stolte C., Sykes S.N.,
RA Thomson T., Walk T., White J., Yandava C., Straight P., Clardy J., Hung D.,
RA Kolter R., Mekalanos J., Walker S., Walsh C.T., Wieland-Brown L.C.,
RA Haas B., Nusbaum C., Birren B.;
RT "Annotation of Streptomyces griseoflavus strain Tu4000.";
RL Submitted (FEB-2009) 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 hydrogenobyrinate, using either L-
CC glutamine or ammonia as the nitrogen source. {ECO:0000256|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: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 precorrin-2 (aerobic route): step 9/10.
CC {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 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:0000256|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:0000256|HAMAP-
CC Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CbiA family. {ECO:0000256|HAMAP-
CC Rule:MF_00027}.
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DR EMBL; GG657758; EFL42074.1; -; Genomic_DNA.
DR AlphaFoldDB; D9XRC7; -.
DR STRING; 467200.SSRG_04878; -.
DR eggNOG; COG1797; Bacteria.
DR HOGENOM; CLU_022752_1_1_11; -.
DR UniPathway; UPA00148; UER00220.
DR Proteomes; UP000002968; 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: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-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 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 7..192
FT /note="CobQ/CobB/MinD/ParA nucleotide binding"
FT /evidence="ECO:0000259|Pfam:PF01656"
FT DOMAIN 288..471
FT /note="CobB/CobQ-like glutamine amidotransferase"
FT /evidence="ECO:0000259|Pfam:PF07685"
FT REGION 245..281
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 247..261
FT /note="Pro residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 371
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
FT SITE 465
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00027"
SQ SEQUENCE 485 AA; 49458 MW; BF76B2151ADEB3E0 CRC64;
MTSVPRLVIA APSSGSGKTT VATGLMAALT ARGLAVSPHK VGPDYIDPGY HALATGRVGR
NLDAYLCGPE LVGPLFAHGA RGCDIAVVEG VMGLYDGAAG EGELASTAQV AKLLRAPVVL
VVDASSQSRS VAALVHGFVS FDPEVRIGGV ILNKVGSDRH EALLREALDS VGVPVLGVLR
RAAPVETPSR HLGLVPVAER GALAVEAVAA MAAQVAGGCD LAALVALARS AGPLAGAGWD
AGEALVSSPP PPLPLPSPGA LPPDSRSALD GPRPQAPDGL VDAGRPVRVA VAGGAAFTFS
YSEHAELLTA AGAEVVVFDP LRDEELPEGT AGLVVGGGFP EVYASELSAN EGLRKSVAEL
ALSGAPVAAE CAGLLYLCRD LDGLPMCGVL DASARMSERL TLGYRDAVAV SDSALAGAGT
RMRGHEFHRT VVEPGAGSAP AWGMRGPERR VEGFVERGVH ASYLHTHWAS EPGVARRFVE
RCRTS
//
