Polynucleotide kinase 3 phosphatases play a role in the repair of single breaks in DNA induced by DNA-damaging agents such as gamma radiation and camptothecin [1].

1: Pnk1, a DNA kinase/phosphatase required for normal response to DNA damage by gamma-radiation or camptothecin in Schizosaccharomyces pombe. Meijer M, Karimi-Busheri F, Huang TY, Weinfeld M, Young D; J Biol Chem. 2002;277:4050-4055. PMID:11729194

2: Purification and partial characterization of a DNA 3'-phosphatase from Schizosaccharomyces pombe. Jilani A, Ramotar D; Biochemistry. 2002;41:7688-7694. PMID:12056900

3: Uncoupling of 3'-phosphatase and 5'-kinase functions in budding yeast. Characterization of Saccharomyces cerevisiae DNA 3'-phosphatase (TPP1). Vance JR, Wilson TE; J Biol Chem. 2001;276:15073-15081. PMID:11278831

4: Molecular characterization of a human DNA kinase. Karimi-Busheri F, Daly G, Robins P, Canas B, Pappin DJ, Sgouros J, Miller GG, Fakhrai H, Davis EM, Le Beau MM, Weinfeld M; J Biol Chem. 1999;274:24187-24194. PMID:10446193