Mouse tetrad analysis provides insights into recombination mechanisms and hotspot evolutionary dynamics.
Mouse tetrad analysis provides insights into recombination mechanisms and hotspot evolutionary dynamics.
复制标题
DOI:
10.1038/ng.3068
复制
发表时间:
2014-10
期刊:
影响因子:
30.8
通讯作者:
Jasin, Maria
中科院分区:
文献类型:
--
作者:
Cole, Francesca;Baudat, Frederic;Grey, Corinne;Keeney, Scott;de Massy, Bernard;Jasin, Maria
The ability to examine all chromatids from a single meiosis in yeast tetrads has been indispensable for defining mechanisms of homologous recombination initiated by DNA double-strand breaks (DSBs). Using a broadly applicable strategy for the analysis of chromatids from a single meiosis at two recombination hotspots in mouse oocytes and spermatocytes, we demonstrate here the unidirectional transfer of information — gene conversion — in both crossovers and noncrossovers. Whereas gene conversion in crossovers is associated with reciprocal exchange, the unbroken chromatid is not altered in noncrossover gene conversions, providing strong evidence that noncrossovers arise from a distinct pathway. Gene conversion frequently spares the binding site of the hotspot-specifying protein PRDM9 with the result that erosion of the hotspot is slowed. Thus, mouse tetrad analysis demonstrates how unique aspects of mammalian recombination mechanisms shape hotspot evolutionary dynamics.
登录
查看更多内容
影响因子:
10.5
作者:
Cole, Francesca;Keeney, Scott;Jasin, Maria
通讯作者:
Jasin, Maria
影响因子:
4.5
作者:
Baudat, Frédéric;de Massy, Bernard
通讯作者:
de Massy, Bernard
影响因子:
12.3
作者:
Billings, Timothy;Parvanov, Emil D.;Petkov, Petko M.
通讯作者:
Petkov, Petko M.
影响因子:
4.5
作者:
Coop, Graham;Myers, Simon R.
通讯作者:
Myers, Simon R.
影响因子:
30.8
作者:
Guillon, H;de Massy, B
通讯作者:
de Massy, B