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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Transcription factor Mts1/Mts2 (Atf1/Pcr1, Gad7/Pcr1) activates the M26 meiotic recombination hotspot in Schizosaccharomyces pombe
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Transcription factor Mts1/Mts2 (Atf1/Pcr1, Gad7/Pcr1) activates the M26 meiotic recombination hotspot in Schizosaccharomyces pombe

机译:转录因子Mts1 / Mts2(Atf1 / Pcr1,Gad7 / Pcr1)激活粟酒裂殖酵母中的M26减数分裂重组热点。

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摘要

Homologous recombination hotspots in- crease the frequency of recombination in nearby DNA. The M26 hotspot in the ade6 gene of Schizosaccharomyces pombe is a meiotic hotspot with a discrete, cis-acting nucleotide se- quence (5'-ATGACGT-3') defined by extensive mutagenesis. A heterodimeric M26 DNA binding protein, composed of sub- units Mts1 and Mts2, has been identified and purified 40,000- fold. Cloning, disruption, and genetic analyses of the mts genes demonstrate that the Mts1/Mts2 heterodimer is essential for hotspot activity. This provides direct evidence that a specific trans-acting factor, binding to a cis-acting site with a unique nucleotide sequence, is required to activate this meiotic hotspot.
机译:同源重组热点增加了附近DNA的重组频率。粟酒裂殖酵母的ade6基因中的M26热点是减数分裂热点,具有离散的,顺式作用的核苷酸序列(5'-ATGACGT-3'),通过广泛的诱变定义。由亚单位Mts1和Mts2组成的异二聚体M26 DNA结合蛋白已被鉴定并纯化了40,000倍。对mts基因的克隆,破坏和遗传分析表明Mts1 / Mts2异二聚体对于热点活动至关重要。这提供了直接的证据,即需要特定的反式作用因子与一个具有独特核苷酸序列的顺式作用位点结合,才能激活该减数分裂热点。

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