Multiple pathways cooperate in the suppression of genome instability in Saccharomyces cerevisiae

Kyungjae Myung, Clark Chen and Richard D. Kolodner ()
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Kyungjae Myung: Ludwig Institute for Cancer Research, University of California San Diego School of Medicine
Clark Chen: Ludwig Institute for Cancer Research, University of California San Diego School of Medicine
Richard D. Kolodner: Ludwig Institute for Cancer Research, University of California San Diego School of Medicine

Nature, 2001, vol. 411, issue 6841, 1073-1076

Abstract: Abstract Gross chromosome rearrangements (GCRs), such as translocations, deletion of a chromosome arm, interstitial deletions and inversions, are often observed in cancer cells1,2,3. Spontaneous GCRs are rare in Saccharomyces cerevisiae; however, the existence of mutator mutants with increased genome instability suggests that GCRs are actively suppressed4,5. Here we show by genetic analysis that these genome rearrangements probably result from DNA replication errors and are suppressed by at least three interacting pathways or groups of proteins: S-phase checkpoint functions5, recombination proteins4 and proteins that prevent de novo addition of telomeres at double-strand breaks (DSBs). Mutations that inactivate these pathways cause high rates of GCRs and show synergistic interactions, indicating that the pathways that suppress GCRs all compete for the same DNA substrates.

Date: 2001
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DOI: 10.1038/35082608

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