ID A0A239FQG7_9PROT Unreviewed; 161 AA.
AC A0A239FQG7;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 19.
DE RecName: Full=Xanthine-guanine phosphoribosyltransferase {ECO:0000256|HAMAP-Rule:MF_01903};
DE Short=XGPRT {ECO:0000256|HAMAP-Rule:MF_01903};
DE EC=2.4.2.22 {ECO:0000256|HAMAP-Rule:MF_01903};
DE AltName: Full=Xanthine phosphoribosyltransferase {ECO:0000256|HAMAP-Rule:MF_01903};
GN Name=gpt {ECO:0000256|HAMAP-Rule:MF_01903};
GN ORFNames=SAMN05880556_107197 {ECO:0000313|EMBL:SNS59060.1};
OS Azospirillum sp. RU38E.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodospirillales;
OC Azospirillaceae; Azospirillum.
OX NCBI_TaxID=1907313 {ECO:0000313|EMBL:SNS59060.1, ECO:0000313|Proteomes:UP000198368};
RN [1] {ECO:0000313|EMBL:SNS59060.1, ECO:0000313|Proteomes:UP000198368}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=RU38E {ECO:0000313|EMBL:SNS59060.1,
RC ECO:0000313|Proteomes:UP000198368};
RA Kim H.J., Triplett B.A.;
RL Submitted (JUN-2017) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Purine salvage pathway enzyme that catalyzes the transfer of
CC the ribosyl-5-phosphate group from 5-phospho-alpha-D-ribose 1-
CC diphosphate (PRPP) to the N9 position of the 6-oxopurines guanine and
CC xanthine to form the corresponding ribonucleotides GMP (guanosine 5'-
CC monophosphate) and XMP (xanthosine 5'-monophosphate), with the release
CC of PPi. To a lesser extent, also acts on hypoxanthine.
CC {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=diphosphate + GMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC guanine; Xref=Rhea:RHEA:25424, ChEBI:CHEBI:16235, ChEBI:CHEBI:33019,
CC ChEBI:CHEBI:58017, ChEBI:CHEBI:58115; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_01903};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=diphosphate + IMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC hypoxanthine; Xref=Rhea:RHEA:17973, ChEBI:CHEBI:17368,
CC ChEBI:CHEBI:33019, ChEBI:CHEBI:58017, ChEBI:CHEBI:58053;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01903};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=diphosphate + XMP = 5-phospho-alpha-D-ribose 1-diphosphate +
CC xanthine; Xref=Rhea:RHEA:10800, ChEBI:CHEBI:17712, ChEBI:CHEBI:33019,
CC ChEBI:CHEBI:57464, ChEBI:CHEBI:58017; EC=2.4.2.22;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01903};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01903};
CC -!- PATHWAY: Purine metabolism; GMP biosynthesis via salvage pathway; GMP
CC from guanine: step 1/1. {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- PATHWAY: Purine metabolism; XMP biosynthesis via salvage pathway; XMP
CC from xanthine: step 1/1. {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|HAMAP-Rule:MF_01903};
CC Peripheral membrane protein {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- SIMILARITY: Belongs to the purine/pyrimidine phosphoribosyltransferase
CC family. XGPT subfamily. {ECO:0000256|HAMAP-Rule:MF_01903}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01903}.
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DR EMBL; FZOI01000007; SNS59060.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A239FQG7; -.
DR UniPathway; UPA00602; UER00658.
DR UniPathway; UPA00909; UER00887.
DR Proteomes; UP000198368; Unassembled WGS sequence.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0052657; F:guanine phosphoribosyltransferase activity; IEA:RHEA.
DR GO; GO:0004422; F:hypoxanthine phosphoribosyltransferase activity; IEA:RHEA.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0000310; F:xanthine phosphoribosyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0032263; P:GMP salvage; IEA:UniProtKB-UniPathway.
DR GO; GO:0006166; P:purine ribonucleoside salvage; IEA:UniProtKB-UniRule.
DR GO; GO:0032265; P:XMP salvage; IEA:UniProtKB-UniPathway.
DR CDD; cd06223; PRTases_typeI; 1.
DR Gene3D; 3.40.50.2020; -; 1.
DR HAMAP; MF_01903; XGPRT; 1.
DR InterPro; IPR000836; PRibTrfase_dom.
DR InterPro; IPR029057; PRTase-like.
DR InterPro; IPR023747; Xanthine_Guanine_PRibTrfase.
DR PANTHER; PTHR39563; XANTHINE PHOSPHORIBOSYLTRANSFERASE; 1.
DR PANTHER; PTHR39563:SF1; XANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE; 1.
DR Pfam; PF00156; Pribosyltran; 1.
DR SUPFAM; SSF53271; PRTase-like; 1.
PE 3: Inferred from homology;
KW Cell membrane {ECO:0000256|ARBA:ARBA00022475, ECO:0000256|HAMAP-
KW Rule:MF_01903};
KW Glycosyltransferase {ECO:0000256|ARBA:ARBA00022676, ECO:0000256|HAMAP-
KW Rule:MF_01903};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01903};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|HAMAP-Rule:MF_01903};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01903};
KW Purine salvage {ECO:0000256|ARBA:ARBA00022726, ECO:0000256|HAMAP-
KW Rule:MF_01903}; Reference proteome {ECO:0000313|Proteomes:UP000198368};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01903}.
FT DOMAIN 16..151
FT /note="Phosphoribosyltransferase"
FT /evidence="ECO:0000259|Pfam:PF00156"
FT BINDING 44..45
FT /ligand="5-phospho-alpha-D-ribose 1-diphosphate"
FT /ligand_id="ChEBI:CHEBI:58017"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 98..106
FT /ligand="5-phospho-alpha-D-ribose 1-diphosphate"
FT /ligand_id="ChEBI:CHEBI:58017"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 99
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 102..106
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 102
FT /ligand="guanine"
FT /ligand_id="ChEBI:CHEBI:16235"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 102
FT /ligand="xanthine"
FT /ligand_id="ChEBI:CHEBI:17712"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 144..145
FT /ligand="GMP"
FT /ligand_id="ChEBI:CHEBI:58115"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 145
FT /ligand="guanine"
FT /ligand_id="ChEBI:CHEBI:16235"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
FT BINDING 145
FT /ligand="xanthine"
FT /ligand_id="ChEBI:CHEBI:17712"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01903"
SQ SEQUENCE 161 AA; 18238 MW; 9192249D240C03EF CRC64;
MSNKISDPQK NFPVTWEELH RNAKALAWRL AEQRPWKGII AITRGGLVPA AIIARELNIR
VVETISVKSY DDKTQGDIQV LKAPDAVTDG GKDWMLIDDL VDTGKTAAYV RKLLPYAHFA
TLYAKPAGRP LVDTFITEVS QDTWIYFPWD LLPVSYLQIE R
//