ID PURQ_RHOJR Reviewed; 225 AA.
AC Q0S774;
DT 17-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT 05-SEP-2006, sequence version 1.
DT 27-MAR-2024, entry version 114.
DE RecName: Full=Phosphoribosylformylglycinamidine synthase subunit PurQ {ECO:0000255|HAMAP-Rule:MF_00421};
DE Short=FGAM synthase {ECO:0000255|HAMAP-Rule:MF_00421};
DE EC=6.3.5.3 {ECO:0000255|HAMAP-Rule:MF_00421};
DE AltName: Full=Formylglycinamide ribonucleotide amidotransferase subunit I {ECO:0000255|HAMAP-Rule:MF_00421};
DE Short=FGAR amidotransferase I {ECO:0000255|HAMAP-Rule:MF_00421};
DE Short=FGAR-AT I {ECO:0000255|HAMAP-Rule:MF_00421};
DE AltName: Full=Glutaminase PurQ {ECO:0000255|HAMAP-Rule:MF_00421};
DE EC=3.5.1.2 {ECO:0000255|HAMAP-Rule:MF_00421};
DE AltName: Full=Phosphoribosylformylglycinamidine synthase subunit I {ECO:0000255|HAMAP-Rule:MF_00421};
GN Name=purQ {ECO:0000255|HAMAP-Rule:MF_00421};
GN OrderedLocusNames=RHA1_ro04827;
OS Rhodococcus jostii (strain RHA1).
OC Bacteria; Actinomycetota; Actinomycetes; Mycobacteriales; Nocardiaceae;
OC Rhodococcus.
OX NCBI_TaxID=101510;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=RHA1;
RX PubMed=17030794; DOI=10.1073/pnas.0607048103;
RA McLeod M.P., Warren R.L., Hsiao W.W.L., Araki N., Myhre M., Fernandes C.,
RA Miyazawa D., Wong W., Lillquist A.L., Wang D., Dosanjh M., Hara H.,
RA Petrescu A., Morin R.D., Yang G., Stott J.M., Schein J.E., Shin H.,
RA Smailus D., Siddiqui A.S., Marra M.A., Jones S.J.M., Holt R.,
RA Brinkman F.S.L., Miyauchi K., Fukuda M., Davies J.E., Mohn W.W.,
RA Eltis L.D.;
RT "The complete genome of Rhodococcus sp. RHA1 provides insights into a
RT catabolic powerhouse.";
RL Proc. Natl. Acad. Sci. U.S.A. 103:15582-15587(2006).
CC -!- FUNCTION: Part of the phosphoribosylformylglycinamidine synthase
CC complex involved in the purines biosynthetic pathway. Catalyzes the
CC ATP-dependent conversion of formylglycinamide ribonucleotide (FGAR) and
CC glutamine to yield formylglycinamidine ribonucleotide (FGAM) and
CC glutamate. The FGAM synthase complex is composed of three subunits.
CC PurQ produces an ammonia molecule by converting glutamine to glutamate.
CC PurL transfers the ammonia molecule to FGAR to form FGAM in an ATP-
CC dependent manner. PurS interacts with PurQ and PurL and is thought to
CC assist in the transfer of the ammonia molecule from PurQ to PurL.
CC {ECO:0000255|HAMAP-Rule:MF_00421}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + H2O + L-glutamine + N(2)-formyl-N(1)-(5-phospho-beta-D-
CC ribosyl)glycinamide = 2-formamido-N(1)-(5-O-phospho-beta-D-
CC ribosyl)acetamidine + ADP + H(+) + L-glutamate + phosphate;
CC Xref=Rhea:RHEA:17129, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29985, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58359, ChEBI:CHEBI:147286, ChEBI:CHEBI:147287,
CC ChEBI:CHEBI:456216; EC=6.3.5.3; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00421};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + L-glutamine = L-glutamate + NH4(+);
CC Xref=Rhea:RHEA:15889, ChEBI:CHEBI:15377, ChEBI:CHEBI:28938,
CC ChEBI:CHEBI:29985, ChEBI:CHEBI:58359; EC=3.5.1.2;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00421};
CC -!- PATHWAY: Purine metabolism; IMP biosynthesis via de novo pathway; 5-
CC amino-1-(5-phospho-D-ribosyl)imidazole from N(2)-formyl-N(1)-(5-
CC phospho-D-ribosyl)glycinamide: step 1/2. {ECO:0000255|HAMAP-
CC Rule:MF_00421}.
CC -!- SUBUNIT: Part of the FGAM synthase complex composed of 1 PurL, 1 PurQ
CC and 2 PurS subunits. {ECO:0000255|HAMAP-Rule:MF_00421}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00421}.
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DR EMBL; CP000431; ABG96612.1; -; Genomic_DNA.
DR RefSeq; WP_009477892.1; NC_008268.1.
DR AlphaFoldDB; Q0S774; -.
DR SMR; Q0S774; -.
DR KEGG; rha:RHA1_ro04827; -.
DR eggNOG; COG0047; Bacteria.
DR HOGENOM; CLU_001031_3_1_11; -.
DR OrthoDB; 9804441at2; -.
DR UniPathway; UPA00074; UER00128.
DR Proteomes; UP000008710; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0004359; F:glutaminase activity; IEA:UniProtKB-EC.
DR GO; GO:0004642; F:phosphoribosylformylglycinamidine synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006189; P:'de novo' IMP biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0006541; P:glutamine metabolic process; IEA:UniProtKB-KW.
DR CDD; cd01740; GATase1_FGAR_AT; 1.
DR Gene3D; 3.40.50.880; -; 1.
DR HAMAP; MF_00421; PurQ; 1.
DR InterPro; IPR029062; Class_I_gatase-like.
DR InterPro; IPR010075; PRibForGlyAmidine_synth_PurQ.
DR NCBIfam; TIGR01737; FGAM_synth_I; 1.
DR PANTHER; PTHR47552; PHOSPHORIBOSYLFORMYLGLYCINAMIDINE SYNTHASE SUBUNIT PURQ; 1.
DR PANTHER; PTHR47552:SF1; PHOSPHORIBOSYLFORMYLGLYCINAMIDINE SYNTHASE SUBUNIT PURQ; 1.
DR Pfam; PF13507; GATase_5; 1.
DR PIRSF; PIRSF001586; FGAM_synth_I; 1.
DR SMART; SM01211; GATase_5; 1.
DR SUPFAM; SSF52317; Class I glutamine amidotransferase-like; 1.
DR PROSITE; PS51273; GATASE_TYPE_1; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cytoplasm; Glutamine amidotransferase; Hydrolase; Ligase;
KW Nucleotide-binding; Purine biosynthesis; Reference proteome.
FT CHAIN 1..225
FT /note="Phosphoribosylformylglycinamidine synthase subunit
FT PurQ"
FT /id="PRO_0000252723"
FT DOMAIN 4..225
FT /note="Glutamine amidotransferase type-1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00421"
FT ACT_SITE 87
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00421"
FT ACT_SITE 196
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00421"
FT ACT_SITE 198
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00421"
SQ SEQUENCE 225 AA; 23500 MW; E0657F2C05EC05D5 CRC64;
MSARVGVITF PGTLDDVDAA RAVTLAGGEA VSLWHGDADL KGVDAVIVPG GFSYGDYLRC
GAIARFAPVM GKVVQAAQGG MPVLGICNGF QVLCEAGLLP GALTRNEGLH FICRDEWLKV
EATSTAWTSR YESGAEILVP LKSGEGRYQA SENVLDELEG EGRVVFRYVG DNPNGSQRGI
AGISSANGRV VGLMPHPEHA TEALTGPSDD GLGMFYSVLD SVISA
//
