ID   PUR3_STAAS              Reviewed;         188 AA.
AC   Q6GAE1;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=Phosphoribosylglycinamide formyltransferase {ECO:0000255|HAMAP-Rule:MF_01930};
DE            EC=2.1.2.2 {ECO:0000255|HAMAP-Rule:MF_01930};
DE   AltName: Full=5'-phosphoribosylglycinamide transformylase {ECO:0000255|HAMAP-Rule:MF_01930};
DE   AltName: Full=GAR transformylase {ECO:0000255|HAMAP-Rule:MF_01930};
DE            Short=GART {ECO:0000255|HAMAP-Rule:MF_01930};
GN   Name=purN {ECO:0000255|HAMAP-Rule:MF_01930}; OrderedLocusNames=SAS1008;
OS   Staphylococcus aureus (strain MSSA476).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=282459;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MSSA476;
RX   PubMed=15213324; DOI=10.1073/pnas.0402521101;
RA   Holden M.T.G., Feil E.J., Lindsay J.A., Peacock S.J., Day N.P.J.,
RA   Enright M.C., Foster T.J., Moore C.E., Hurst L., Atkin R., Barron A.,
RA   Bason N., Bentley S.D., Chillingworth C., Chillingworth T., Churcher C.,
RA   Clark L., Corton C., Cronin A., Doggett J., Dowd L., Feltwell T., Hance Z.,
RA   Harris B., Hauser H., Holroyd S., Jagels K., James K.D., Lennard N.,
RA   Line A., Mayes R., Moule S., Mungall K., Ormond D., Quail M.A.,
RA   Rabbinowitsch E., Rutherford K.M., Sanders M., Sharp S., Simmonds M.,
RA   Stevens K., Whitehead S., Barrell B.G., Spratt B.G., Parkhill J.;
RT   "Complete genomes of two clinical Staphylococcus aureus strains: evidence
RT   for the rapid evolution of virulence and drug resistance.";
RL   Proc. Natl. Acad. Sci. U.S.A. 101:9786-9791(2004).
CC   -!- FUNCTION: Catalyzes the transfer of a formyl group from 10-
CC       formyltetrahydrofolate to 5-phospho-ribosyl-glycinamide (GAR),
CC       producing 5-phospho-ribosyl-N-formylglycinamide (FGAR) and
CC       tetrahydrofolate. {ECO:0000255|HAMAP-Rule:MF_01930}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(6S)-10-formyltetrahydrofolate + N(1)-(5-phospho-beta-D-
CC         ribosyl)glycinamide = (6S)-5,6,7,8-tetrahydrofolate + H(+) + N(2)-
CC         formyl-N(1)-(5-phospho-beta-D-ribosyl)glycinamide;
CC         Xref=Rhea:RHEA:15053, ChEBI:CHEBI:15378, ChEBI:CHEBI:57453,
CC         ChEBI:CHEBI:57454, ChEBI:CHEBI:143788, ChEBI:CHEBI:147286;
CC         EC=2.1.2.2; Evidence={ECO:0000255|HAMAP-Rule:MF_01930};
CC   -!- PATHWAY: Purine metabolism; IMP biosynthesis via de novo pathway; N(2)-
CC       formyl-N(1)-(5-phospho-D-ribosyl)glycinamide from N(1)-(5-phospho-D-
CC       ribosyl)glycinamide (10-formyl THF route): step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01930}.
CC   -!- SIMILARITY: Belongs to the GART family. {ECO:0000255|HAMAP-
CC       Rule:MF_01930}.
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DR   EMBL; BX571857; CAG42782.1; -; Genomic_DNA.
DR   RefSeq; WP_000238663.1; NC_002953.3.
DR   AlphaFoldDB; Q6GAE1; -.
DR   SMR; Q6GAE1; -.
DR   KEGG; sas:SAS1008; -.
DR   HOGENOM; CLU_038395_1_3_9; -.
DR   OMA; TGITIHY; -.
DR   UniPathway; UPA00074; UER00126.
DR   GO; GO:0004644; F:phosphoribosylglycinamide formyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006189; P:'de novo' IMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd08645; FMT_core_GART; 1.
DR   HAMAP; MF_01930; PurN; 1.
DR   InterPro; IPR002376; Formyl_transf_N.
DR   InterPro; IPR036477; Formyl_transf_N_sf.
DR   InterPro; IPR004607; GART.
DR   Pfam; PF00551; Formyl_trans_N; 1.
DR   SUPFAM; SSF53328; SSF53328; 1.
DR   TIGRFAMs; TIGR00639; PurN; 1.
PE   3: Inferred from homology;
KW   Purine biosynthesis; Transferase.
FT   CHAIN           1..188
FT                   /note="Phosphoribosylglycinamide formyltransferase"
FT                   /id="PRO_0000074949"
FT   ACT_SITE        110
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
FT   BINDING         12..14
FT                   /ligand="N(1)-(5-phospho-beta-D-ribosyl)glycinamide"
FT                   /ligand_id="ChEBI:CHEBI:143788"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
FT   BINDING         66
FT                   /ligand="(6S)-10-formyltetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57454"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
FT   BINDING         91..94
FT                   /ligand="(6S)-10-formyltetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57454"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
FT   BINDING         108
FT                   /ligand="(6S)-10-formyltetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57454"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
FT   SITE            146
FT                   /note="Raises pKa of active site His"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01930"
SQ   SEQUENCE   188 AA;  21153 MW;  D034134258D89AEE CRC64;
     MVKIAIFASG SGSNFENIVE HVESGKLENI EVTALYTDHQ NAFCIDRAKK HDIPVYINEP
     KQFDSKAAYE QHLVSLLNED KVEWIILAGY MRLIGPDLLA SFEGKILNIH PSLLPKYKGI
     DAIGQAYHSG DTITGSTVHY VDCGMDTGEI IEQRQCDIRP DDSKEQLEEK VKKLEYELYP
     SVIAKIVK