Genome-wide analysis of re-replication reveals inhibitory controls that target multiple stages of replication initiation.

Journal Article (Journal Article)

DNA replication must be tightly controlled during each cell cycle to prevent unscheduled replication and ensure proper genome maintenance. The currently known controls that prevent re-replication act redundantly to inhibit pre-replicative complex (pre-RC) assembly outside of the G1-phase of the cell cycle. The yeast Saccharomyces cerevisiae has been a useful model organism to study how eukaryotic cells prevent replication origins from reinitiating during a single cell cycle. Using a re-replication-sensitive strain and DNA microarrays, we map sites across the S. cerevisiae genome that are re-replicated as well as sites of pre-RC formation during re-replication. Only a fraction of the genome is re-replicated by a subset of origins, some of which are capable of multiple reinitiation events. Translocation experiments demonstrate that origin-proximal sequences are sufficient to predispose an origin to re-replication. Origins that reinitiate are largely limited to those that can recruit Mcm2-7 under re-replicating conditions; however, the formation of a pre-RC is not sufficient for reinitiation. Our findings allow us to categorize origins with respect to their propensity to reinitiate and demonstrate that pre-RC formation is not the only target for the mechanisms that prevent genomic re-replication.

Full Text

Duke Authors

Cited Authors

  • Tanny, RE; MacAlpine, DM; Blitzblau, HG; Bell, SP

Published Date

  • May 2006

Published In

Volume / Issue

  • 17 / 5

Start / End Page

  • 2415 - 2423

PubMed ID

  • 16525018

Pubmed Central ID

  • PMC1446079

International Standard Serial Number (ISSN)

  • 1059-1524

Digital Object Identifier (DOI)

  • 10.1091/mbc.e05-11-1037


  • eng

Conference Location

  • United States