DNA polymerase that preferentially incorporates the non-canonical base aminoadenine/dZTP instead of adenine into the synthesized DNA (PubMed:33926956). 29 times as efficient in using dZTP instead of dATP as a substrate (PubMed:33926956). In addition to this preference for dZTP, the phage also encodes a dATP triphosphohydrolase that removes dATP and its precursor dADP from the nucleotide pool of the host (PubMed:33926956). a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) = diphosphate + DNA(n+1) DNA(n) + dZTP = diphosphate + DNA(n)-Z Belongs to the DNA polymerase type-A family. DpoZ subfamily.