PNKP is required for maintaining the integrity of progenitor cell populations in adult mice.

ABSTRACT: DNA repair proteins are critical to the maintenance of genomic integrity. Specific types of genotoxic factors, including reactive oxygen species generated during normal cellular metabolism or as a result of exposure to exogenous oxidative agents, frequently leads to "ragged" single-strand DNA breaks. The latter exhibits abnormal free DNA ends containing either a 5'-hydroxyl or 3'-phosphate requiring correction by the dual function enzyme, polynucleotide kinase phosphatase (PNKP), before DNA polymerase and ligation reactions can occur to seal the break. Pnkp gene deletion during early murine development leads to lethality; in contrast, the role of PNKP in adult mice is unknown. To investigate the latter, we used an inducible conditional mutagenesis approach to cause global disruption

SUBMITTER: Shin W 

PROVIDER: S-EPMC8321660 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature