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exodeoxyribonuclease III
Removes the damaged DNA at cytosines and guanines by cleaving on the 3' side of the AP site by a beta-elimination reaction
exodeoxyribonuclease III is a Mg-dependent 3' to 5' exonuclease acting on dsDNA, which releases 5' phosphomononucleotides as degradation products
All proteins in this family for which functions are known are 5' AP endonucleases that function in base excision repair and the repair of abasic sites in DNA. Note that the member from Methanothermobacter thermautotrophicus functions additionally as a DNA uridine endonuclease. This family derived from the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University).
The model brings in reverse transcriptases at scores below 50, model also contains eukaryotic apurinic/apyrimidinic endonucleases which group in the same family
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