UniProt ID: Q7SZW5 |
FUNCTION: The purine nucleoside phosphorylases catalyze the phosphorolytic breakdown of the N-glycosidic bond in the beta- (deoxy)ribonucleoside molecules, with the formation of the corresponding free purine bases and pentose-1-phosphate. {ECO:0000256|PIRNR:PIRNR000477}. CATALYTIC ACTIVITY: Reaction=2'-deoxyguanosine + phosphate = 2-deoxy-alpha-D-ribose 1- phosphate + guanine; Xref=Rhea:RHEA:27738, ChEBI:CHEBI:16235, ChEBI:CHEBI:17172, ChEBI:CHEBI:43474, ChEBI:CHEBI:57259; EC=2.4.2.1; Evidence={ECO:0000256|ARBA:ARBA00023929, ECO:0000256|PIRNR:PIRNR000477}; CATALYTIC ACTIVITY: Reaction=2'-deoxyinosine + phosphate = 2-deoxy-alpha-D-ribose 1- phosphate + hypoxanthine; Xref=Rhea:RHEA:27750, ChEBI:CHEBI:17368, ChEBI:CHEBI:28997, ChEBI:CHEBI:43474, ChEBI:CHEBI:57259; EC=2.4.2.1; Evidence={ECO:0000256|ARBA:ARBA00023950, ECO:0000256|PIRNR:PIRNR000477}; CATALYTIC ACTIVITY: Reaction=guanosine + phosphate = alpha-D-ribose 1-phosphate + guanine; Xref=Rhea:RHEA:13233, ChEBI:CHEBI:16235, ChEBI:CHEBI:16750, ChEBI:CHEBI:43474, ChEBI:CHEBI:57720; EC=2.4.2.1; Evidence={ECO:0000256|ARBA:ARBA00023970, ECO:0000256|PIRNR:PIRNR000477}; CATALYTIC ACTIVITY: Reaction=inosine + phosphate = alpha-D-ribose 1-phosphate + hypoxanthine; Xref=Rhea:RHEA:27646, ChEBI:CHEBI:17368, ChEBI:CHEBI:17596, ChEBI:CHEBI:43474, ChEBI:CHEBI:57720; EC=2.4.2.1; Evidence={ECO:0000256|ARBA:ARBA00023918, ECO:0000256|PIRNR:PIRNR000477}; PATHWAY: Purine metabolism; purine nucleoside salvage. {ECO:0000256|ARBA:ARBA00005058, ECO:0000256|PIRNR:PIRNR000477}. SUBUNIT: Homotrimer. {ECO:0000256|ARBA:ARBA00011233}. SIMILARITY: Belongs to the PNP/MTAP phosphorylase family. {ECO:0000256|ARBA:ARBA00006751, ECO:0000256|PIRNR:PIRNR000477}. |
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