DATP(dGTP)—DNA purinetransferase

dATP(dGTP)—DNA purinetransferase is an enzyme with systematic name dATP(dGTP):depurinated-DNA purine transferase. This enzyme catalyses the following chemical reaction


 * (1) dATP + depurinated DNA $$\rightleftharpoons$$ deoxyribose triphosphate + DNA
 * (2) dGTP + depurinated DNA $$\rightleftharpoons$$ deoxyribose triphosphate + DNA

The purine residue is transferred on to the apurinic site forming a normal glycosylic bond.