Homologue engagement controls meiotic DNA break number and distribution.
Homologue engagement controls meiotic DNA break number and distribution.
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DOI:
10.1038/nature13120
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发表时间:
2014-06-12
期刊:
影响因子:
64.8
通讯作者:
Keeney, Scott
中科院分区:
文献类型:
--
作者:
Thacker, Drew;Mohibullah, Neeman;Zhu, Xuan;Keeney, Scott
Meiotic recombination promotes genetic diversification as well as pairing and segregation of homologous chromosomes, but the double-strand breaks (DSBs) that initiate recombination are dangerous lesions that can cause mutation or meiotic failure. How cells control DSBs to balance between beneficial and deleterious outcomes is not well understood. This study tests the hypothesis that DSB control involves a network of intersecting negative regulatory circuits. Using multiple complementary methods, we show that DSBs form in greater numbers in Saccharomyces cerevisiae cells lacking ZMM proteins, a suite of recombination-promoting factors traditionally regarded as acting strictly downstream of DSB formation. ZMM-dependent DSB control is genetically distinct from a pathway tying break formation to meiotic progression through the Ndt80 transcription factor. These counterintuitive findings suggest that homologous chromosomes that have successfully engaged one another stop making breaks. Genome-wide DSB maps uncover distinct responses by different subchromosomal domains to the zmm mutation zip3, and show that Zip3 is required for the previously unexplained tendency of DSB density to vary with chromosome size. Thus, feedback tied to ZMM function contributes in unexpected ways to spatial patterning of recombination.
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影响因子:
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作者:
Carballo JA;Panizza S;Serrentino ME;Johnson AL;Geymonat M;Borde V;Klein F;Cha RS
通讯作者:
Cha RS
影响因子:
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Keeney, Scott
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Lichten, M
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