ID   GUAA_SPIKU              Reviewed;         512 AA.
AC   P60502;
DT   01-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2004, sequence version 1.
DT   03-AUG-2022, entry version 76.
DE   RecName: Full=GMP synthase [glutamine-hydrolyzing] {ECO:0000255|HAMAP-Rule:MF_00344};
DE            EC=6.3.5.2 {ECO:0000255|HAMAP-Rule:MF_00344};
DE   AltName: Full=GMP synthetase {ECO:0000255|HAMAP-Rule:MF_00344};
DE   AltName: Full=Glutamine amidotransferase {ECO:0000255|HAMAP-Rule:MF_00344};
GN   Name=guaA {ECO:0000255|HAMAP-Rule:MF_00344};
OS   Spiroplasma kunkelii.
OC   Bacteria; Tenericutes; Mollicutes; Entomoplasmatales; Spiroplasmataceae;
OC   Spiroplasma.
OX   NCBI_TaxID=47834;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=CR2-3x;
RX   PubMed=12845528; DOI=10.1007/s00438-003-0878-3;
RA   Zhao Y., Hammond R.W., Jomantiene R., Dally E.L., Lee I.-M., Jia H., Wu H.,
RA   Lin S., Zhang P., Kenton S., Najar F.Z., Hua A., Roe B.A., Fletcher J.,
RA   Davis R.E.;
RT   "Gene content and organization of an 85-kb DNA segment from the genome of
RT   the phytopathogenic mollicute Spiroplasma kunkelii.";
RL   Mol. Genet. Genomics 269:592-602(2003).
CC   -!- FUNCTION: Catalyzes the synthesis of GMP from XMP. {ECO:0000255|HAMAP-
CC       Rule:MF_00344}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + H2O + L-glutamine + XMP = AMP + diphosphate + GMP + 2
CC         H(+) + L-glutamate; Xref=Rhea:RHEA:11680, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:29985, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:57464, ChEBI:CHEBI:58115,
CC         ChEBI:CHEBI:58359, ChEBI:CHEBI:456215; EC=6.3.5.2;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00344};
CC   -!- PATHWAY: Purine metabolism; GMP biosynthesis; GMP from XMP (L-Gln
CC       route): step 1/1. {ECO:0000255|HAMAP-Rule:MF_00344}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00344}.
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DR   EMBL; AY198133; AAP58945.1; -; Genomic_DNA.
DR   AlphaFoldDB; P60502; -.
DR   SMR; P60502; -.
DR   UniPathway; UPA00189; UER00296.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003922; F:GMP synthase (glutamine-hydrolyzing) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0016462; F:pyrophosphatase activity; IEA:InterPro.
DR   GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-KW.
DR   CDD; cd01742; GATase1_GMP_Synthase; 1.
DR   CDD; cd01997; GMP_synthase_C; 1.
DR   Gene3D; 3.40.50.620; -; 1.
DR   Gene3D; 3.40.50.880; -; 1.
DR   HAMAP; MF_00344; GMP_synthase; 1.
DR   InterPro; IPR029062; Class_I_gatase-like.
DR   InterPro; IPR017926; GATASE.
DR   InterPro; IPR001674; GMP_synth_C.
DR   InterPro; IPR004739; GMP_synth_GATase.
DR   InterPro; IPR022955; GMP_synthase.
DR   InterPro; IPR025777; GMPS_ATP_PPase_dom.
DR   InterPro; IPR022310; NAD/GMP_synthase.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   Pfam; PF00117; GATase; 1.
DR   Pfam; PF00958; GMP_synt_C; 1.
DR   Pfam; PF02540; NAD_synthase; 1.
DR   SUPFAM; SSF52317; SSF52317; 1.
DR   TIGRFAMs; TIGR00884; guaA_Cterm; 1.
DR   TIGRFAMs; TIGR00888; guaA_Nterm; 1.
DR   PROSITE; PS51273; GATASE_TYPE_1; 1.
DR   PROSITE; PS51553; GMPS_ATP_PPASE; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Glutamine amidotransferase; GMP biosynthesis; Ligase;
KW   Nucleotide-binding; Purine biosynthesis.
FT   CHAIN           1..512
FT                   /note="GMP synthase [glutamine-hydrolyzing]"
FT                   /id="PRO_0000140174"
FT   DOMAIN          6..195
FT                   /note="Glutamine amidotransferase type-1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
FT   DOMAIN          196..387
FT                   /note="GMPS ATP-PPase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
FT   ACT_SITE        83
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
FT   ACT_SITE        169
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
FT   ACT_SITE        171
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
FT   BINDING         223..229
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00344"
SQ   SEQUENCE   512 AA;  57490 MW;  8C419F7E3E7231A6 CRC64;
     MKTTNKIIIL DFGSQYTQLI ARRIRDLEVY CEVWPYNTAL EKIKTTSMKG IILSGGPASV
     YEEDAFLIDK QLFELKVPVL GICYGMQIIS HLHEGTVQRA TKQEFGFSEL IIDNQEDLFA
     NIPVKSQVWM SHADYIEGMP TNFIQIAHSE NSISAIKHSE KKIYGLQFHP EVTHTLIGQQ
     LLSNFVFNIC GCQPKWKITE FISAAITEIK NKVGTDNVVL ALSGGVDSSV CAVLLHKAIG
     KQLTCIFVDT GLLRQNSGWN DLQKFQEKFK LNIIKINAQE RFLTALKGVT NPEEKRKIIG
     NLFIEIFNEE AIKIQNVKWL GQGTIYPDVI ESVSVKGPSA TIKSHHNVGG LPKDLPFQLI
     EPLRELFKDE VRRTGEALGI DFKFVYKHPF PGPGLAVRII GEITAEKIAL LQAADQIFID
     ELYQANLYDQ VAQAFVVLLP VQSVGVMGDV RTYGYTAVVR SVDTTDFMTA NWSRLPFELL
     EKVSARIVSE VHGINRITYD ITSKPPGTIE WE