Formamidopyrimidine-DNA glycosylase mutM FPG_SERMA MPELPEVETSRRGIEPYLVGHSIQYAVVRNARLRWPVSEQILTLSDQPVLSVQRRAKYLLIELERGWIIVHLGMSGSLRMLREENEDEAGKHDHVDLVINNGMILRYTDPRRFGAWLWCEDLATSSVLAHLGPEPLSEAFNGDYLYEKSRNKRTLIKPWLMDNKLVVGVGNIYASESLFSAGILPDRPAGSLTKAEAALLAKTIKAVLQRSIEQGGTTLRDFLQSDGKPGYFAQELQVYGRAGEPCRTCGTPIESAKHGQRSTFFCRRCQR 271 DNA-(apurinic or apyrimidinic site) lyase mutM fpg Involved in base excision repair of DNA damaged by oxidation or by mutagenic agents. Acts as DNA glycosylase that recognizes and removes damaged bases. Has a preference for oxidized purines, such as 7,8-dihydro-8-oxoguanine (8-oxoG). Has AP (apurinic/apyrimidinic) lyase activity and introduces nicks in the DNA strand. Cleaves the DNA backbone by beta-delta elimination to generate a single-strand break at the site of the removed base with both 3'- and 5'-phosphates (By similarity).