Function:Corrects defective DNA strand-break repair and sister chromatid exchange following treatment with ionizing radiation and alkylating agents. ,polymorphism:Carriers of the polymorphic Gln-399 allele may be at greater risk for tobacco- and age-related DNA damage. ,PTM:Phosphorylation of Ser-371 causes dimer dissociation. Phosphorylation by CK2 promotes interaction with APTX and APLF. ,PTM:Sumoylated. ,similarity:Contains 2 BRCT domains. ,subcellular location:Accumulates at sites of DNA damage. ,subunit:Homodimer. Interacts with polynucleotide kinase (PNK) , DNA polymerase-beta (POLB) and DNA ligase III (LIG3) . Interacts with APTX and APLF. ,
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