Catalysis of the removal of oxidized purine bases by cleaving the N-C1' glycosidic bond between the oxidized purine and the deoxyribose sugar. The reaction involves the formation of a covalent enzyme-substrate intermediate. Release of the enzyme and free base by a beta-elimination or a beta, gamma-elimination mechanism results in the cleavage of the DNA backbone 3' of the apurinic (AP) site.
Comment:
Consider also annotating to the molecular function term 'DNA-(apurinic or apyrimidinic site) lyase activity ; GO:0003906'.
Synonyms:
exact_synonym:
oxidized purine base lesion DNA N-glycosylase activity
broad_synonym:
8-oxoguanine DNA glycosylase activity; DNA glycosylase/AP-lyase activity; DNA glycosylase/beta-lyase activity; bifunctional DNA glycosylase activity
related_synonym:
2,6-diamino-4-hydroxy-5(N-methyl)formamidopyrimidine-DNA glycosylase activity; 2,6-diamino-4-hydroxy-5N-formamidopyrimidine-DNA glycosylase activity; DNA glycohydrolase [2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimide releasing]; DNA-formamidopyrimidine glycosylase activity; Fapy-DNA glycosylase activity; Fpg protein; deoxyribonucleate glycosidase activity; purine-specific oxidized base lesion DNA N-glycosylase activity
alt_id:
GO:0003907
xref:
EC:3.2.2.23; MetaCyc:3.2.2.23-RXN; Reactome:R-HSA-110243 "Excision of 8-oxoguanine by OGG1 glycosylase"; Reactome:R-HSA-110244 "Excision of FapyG by OGG1 glycosylase"; reactome:R-HSA-110229 "Cleavage of formamidopyrimidine (FapyA) by NTHL1 glycosylase"