Journal
MOLECULAR CELL
Volume 46, Issue 1, Pages 43-53Publisher
CELL PRESS
DOI: 10.1016/j.molcel.2012.02.020
Keywords
-
Categories
Funding
- National Institutes of Health, through the Center for Cancer Research of the National Cancer Institute
Ask authors/readers for more resources
The BLM helicase has been shown to maintain genome stability by preventing accumulation of aberrant recombination intermediates. We show here that the Saccharomyces cerevisiae BLM ortholog, Sgs1, plays an integral role in normal meiotic recombination, beyond its documented activity limiting aberrant recombination intermediates. In wild-type meiosis, temporally and mechanistically distinct pathways produce crossover and noncrossover recombinants. Crossovers form late in meiosis I prophase, by polo kinase-triggered resolution of Holliday junction (HJ) intermediates. Noncrossovers form earlier, via processes that do not involve stable HJ intermediates. In contrast, sgs1 mutants abolish early noncrossover formation. Instead, both non-crossovers and crossovers form by late HJ intermediate resolution, using an alternate pathway requiring the overlapping activities of Mus81-Mms4, Yen1, and Slx1-Slx4, nucleases with minor roles in wildtype meiosis. We conclude that Sgs1 is a primary regulator of recombination pathway choice during meiosis and suggest a similar function in the mitotic cell cycle.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available