ENTRY       EC 2.7.1.143
NAME        Diphosphate-Purine nucleoside kinase
            Pyrophosphate-Purine nucleoside kinase
            Pyrophosphate-dependent nucleoside kinase
CLASS       Transferases
            Transferring phosphorus-containing groups
            Phosphotransferases with an alcohol group as acceptor
REACTION    Diphosphate + Purine nucleoside = Phosphate +
            Purine mononucleoside
SUBSTRATE   Diphosphate
            Purine nucleoside
PRODUCT     Phosphate
            Purine mononucleoside
COMMENT     The enzyme from the Acholeplasma class of mollicutes catalyses
            the conversion of Adenosine, Guanosine and Inosine to AMP, GMP
            and IMP
            ATP cannot substitute for Diphosphate as a substrate.
DBLINKS     University of Geneva ENZYME DATA BANK: 2.7.1.143
            WIT (What Is There) Metabolic Reconstruction: 2.7.1.143
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