a 3'end (2'-deoxyribonucleotide 3'-phosphate)-DNA + H2O = a 3'-end 2'-deoxyribonucleotide-DNA + phosphate a 5'-end dephospho-2'-deoxyribonucleoside-DNA + ATP = a 5'-end 5'-monophospho-2'-deoxyribonucleoside-DNA + ADP + H(+) In the N-terminal section; belongs to the DNA 3' phosphatase family.