Fe(II) phthalocyanine catalyzed oxidation of dGMP by molecular oxygen

We show that iron(II)-phthalocyanines are able to catalyze guanosine oxidation by molecular oxygen in the presence of reducing agents such as ascorbic acid and 2-mercaptoethanol. The products of 5′-monophosphate-2′-deoxyguanosine (dGMP) oxidation were directly analyzed using the HPLC-ESI/MS method. The main oxidation products were 5′-phospho-2′-deoxy-8-oxo-7,8-dihydroguanine and the 1,N2-glyoxal adduct of the 5′-monophosphate-2′-deoxyguanosine.