From the Cover: mitotic gene conversion events induced in G1-synchronized yeast cells by gamma rays are similar to spontaneous conversion events.

Journal Article (Journal Article)

In a previous study, we mapped spontaneous mitotic reciprocal crossovers (RCOs) in a 120-kb interval of chromosome V of Saccharomyces cerevisiae. About three-quarters of the crossovers were associated with gene conversion tracts. About 40% of these conversion tracts had the pattern expected as a consequence of repair of a double-stranded DNA break (DSB) of an unreplicated chromosome. We test this hypothesis by examining the crossovers and gene conversion events induced by gamma irradiation in G1- and G2-arrested diploid yeast cells. The gene conversion patterns of G1-irradiated cells (but not G2-irradiated cells) mimic conversion events associated with spontaneous RCOs, confirming our previous conclusion that many spontaneous crossovers are initiated by a DSB on an unreplicated chromosome.

Full Text

Duke Authors

Cited Authors

  • Lee, PS; Petes, TD

Published Date

  • April 20, 2010

Published In

Volume / Issue

  • 107 / 16

Start / End Page

  • 7383 - 7388

PubMed ID

  • 20231456

Pubmed Central ID

  • PMC2867710

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

Digital Object Identifier (DOI)

  • 10.1073/pnas.1001940107


  • eng

Conference Location

  • United States