Deoxycytidyl transferase involved in DNA repair. Transfers a dCMP residue from dCTP to the 3'-end of a DNA primer in a template-dependent reaction. May assist in the first step in the bypass of abasic lesions by the insertion of a nucleotide opposite the lesion. Required for normal induction of mutations by physical and chemical agents. Involved in mitochondrial DNA mutagenesis. Binds 2 magnesium ions. Interacts with REV7. Present with 521 molecules/cell in log phase SD medium. Belongs to the DNA polymerase type-Y family.