The Enhanced DNA Replication Fidelity of a Mutant Herpes Simplex Virus Type 1 DNA Polymerase Is Mediated by an Improved Nucleotide Selectivity and Reduced Mismatch Extension Ability

摘要

We previously demonstrated that a recombinant herpes simplex virus containing a mutation within the finger domain of DNA polymerase replicated DNA with increased fidelity. In this study, we demonstrate that, compared with wild-type polymerase, the mutant enzyme exhibited improved nucleotide selectivity and a reduced ability to extend from mismatched primer termini, which would contribute to the increased DNA replication fidelity.