CBIA_SACS2
ID CBIA_SACS2 Reviewed; 434 AA.
AC Q980B1;
DT 25-OCT-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2001, sequence version 1.
DT 25-MAY-2022, entry version 101.
DE RecName: Full=Cobyrinate a,c-diamide synthase {ECO:0000255|HAMAP-Rule:MF_00027};
DE EC=6.3.5.11 {ECO:0000255|HAMAP-Rule:MF_00027};
DE AltName: Full=Cobyrinic acid a,c-diamide synthetase {ECO:0000255|HAMAP-Rule:MF_00027};
GN Name=cbiA {ECO:0000255|HAMAP-Rule:MF_00027}; OrderedLocusNames=SSO0404;
OS Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)
OS (Sulfolobus solfataricus).
OC Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC Saccharolobus.
OX NCBI_TaxID=273057;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 35092 / DSM 1617 / JCM 11322 / P2;
RX PubMed=11427726; DOI=10.1073/pnas.141222098;
RA She Q., Singh R.K., Confalonieri F., Zivanovic Y., Allard G., Awayez M.J.,
RA Chan-Weiher C.C.-Y., Clausen I.G., Curtis B.A., De Moors A., Erauso G.,
RA Fletcher C., Gordon P.M.K., Heikamp-de Jong I., Jeffries A.C., Kozera C.J.,
RA Medina N., Peng X., Thi-Ngoc H.P., Redder P., Schenk M.E., Theriault C.,
RA Tolstrup N., Charlebois R.L., Doolittle W.F., Duguet M., Gaasterland T.,
RA Garrett R.A., Ragan M.A., Sensen C.W., Van der Oost J.;
RT "The complete genome of the crenarchaeon Sulfolobus solfataricus P2.";
RL Proc. Natl. Acad. Sci. U.S.A. 98:7835-7840(2001).
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:0000255|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: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 sirohydrochlorin (anaerobic route):
CC step 10/10. {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 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:0000255|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:0000255|HAMAP-Rule:MF_00027}.
CC -!- SIMILARITY: Belongs to the CobB/CbiA family. {ECO:0000255|HAMAP-
CC Rule:MF_00027}.
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DR EMBL; AE006641; AAK40733.1; -; Genomic_DNA.
DR PIR; F90184; F90184.
DR RefSeq; WP_009988783.1; NC_002754.1.
DR AlphaFoldDB; Q980B1; -.
DR SMR; Q980B1; -.
DR STRING; 273057.SSO0404; -.
DR DNASU; 1455543; -.
DR EnsemblBacteria; AAK40733; AAK40733; SSO0404.
DR GeneID; 44129385; -.
DR KEGG; sso:SSO0404; -.
DR PATRIC; fig|273057.12.peg.400; -.
DR eggNOG; arCOG00106; Archaea.
DR HOGENOM; CLU_022752_2_1_2; -.
DR InParanoid; Q980B1; -.
DR OMA; QPFKCGP; -.
DR PhylomeDB; Q980B1; -.
DR UniPathway; UPA00148; UER00231.
DR Proteomes; UP000001974; 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-KW.
DR Gene3D; 3.40.50.300; -; 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; Reference proteome.
FT CHAIN 1..434
FT /note="Cobyrinate a,c-diamide synthase"
FT /id="PRO_0000141280"
FT DOMAIN 239..430
FT /note="GATase cobBQ-type"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
FT ACT_SITE 320
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
FT SITE 422
FT /note="Increases nucleophilicity of active site Cys"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00027"
SQ SEQUENCE 434 AA; 49346 MW; 20C0BFF167C9CF7C CRC64;
MKRILLSSDR SGSGKTLITS AIMRALSKKY KVRGFKAGPD FIDPGYHKIA TGFPSINLDL
WMMGKNNVKR SLAKYGKEFD IGIIEGVMGL YDGVDTLYST YELAKVTKTP IILIINCSNI
GSTVGAIVKG LKYYRSDVSI RGVIFNKIAS ETHYNYCRNA VEDVEVLGYV PFDKNLEIKS
RHLGLVTVED NREVQNLIRY ASELVEKYVD LDKIYEMASD EDLEIDLPED NESNGVKRKM
AIAYDPAFSF YYQENLDILK NKYELEFFSP LNNEYVEDAE AIYIGGGYPE LHLNELEKST
RTKKWLKNMS YAGVKIYAEC GGLMYLSKNL IDENNKNHSM TGIFDIDIKT KDKLTIGYTE
LEAVKENFIV NKNNVVRGHE FHVSKPISVN EKEFVFKVRI GKGIINKLDG VKSNNTVASY
SHLHFSNFQL RIVF
