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The Fork Protection Complex generates DNA topological stress induced DNA damage while ensuring full and faithful genome duplication

ABSTRACT: This SuperSeries is composed of the SubSeries listed below (GSE239965, GSE239966).

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE239967 | GEO | 2024/10/21

REPOSITORIES: GEO

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The fork protection complex generates DNA topological stress-induced DNA damage while ensuring full and faithful genome duplication.

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The fork protection complex generates DNA topological stress-induced DNA damage while ensuring full and faithful genome duplication [ChIP-seq]

Project description:The fork protection complex (FPC), composed of Mrc1, Tof1, and Csm3, supports rapid and stable DNA replication. Here, we show that FPC activity also introduces DNA damage by increasing DNA topological stress during replication. Mrc1 action increases DNA topological stress during plasmid replication, while Mrc1 or Tof1 activity causes replication stress and DNA damage within topologically constrained regions. We show that the recruitment of Top1 to the fork by Tof1 suppresses the DNA damage generated in these loci. While FPC activity introduces some DNA damage due to increased topological stress, the FPC is also necessary to prevent DNA damage in long replicons across the genome, indicating that the FPC is required for complete and faithful genome duplication. We conclude that FPC regulation must balance ensuring full genome duplication through rapid replication with minimizing the consequential DNA topological stress-induced DNA damage caused by rapid replication through constrained regions.

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The fork protection complex generates DNA topological stress-induced DNA damage while ensuring full and faithful genome duplication [TrAEL-seq]

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The Fork Protection Complex generates DNA topological stress induced DNA damage while ensuring full and faithful genome duplication

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