HDNA2 nuclease/helicase promotes centromeric DNA replication and genome stability.

ABSTRACT: DNA2 is a nuclease/helicase that is involved in Okazaki fragment maturation, replication fork processing, and end resection of DNA double-strand breaks. Similar such helicase activity for resolving secondary structures and structure-specific nuclease activity are needed during DNA replication to process the chromosome-specific higher order repeat units present in the centromeres of human chromosomes. Here, we show that DNA2 binds preferentially to centromeric DNA The nuclease and helicase activities of DNA2 are both essential for resolution of DNA structural obstacles to facilitate DNA replication fork movement. Loss of DNA2-mediated clean-up mechanisms impairs centromeric DNA replication and CENP-A deposition, leading to activation of the ATR DNA damage checkpoints at centromeric DNA regi

SUBMITTER: Li Z 

PROVIDER: S-EPMC6043852 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature