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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Silent chromatin determines target preference of the Saccharomyces retrotransposon Ty5
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Silent chromatin determines target preference of the Saccharomyces retrotransposon Ty5

机译:沉默的染色质确定酵母逆转录转座子Ty5的目标偏好。

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摘要

The HML and HMR mating loci of Saccha- romyces cerevisiae are bound in silent chromatin, which is assembled at the flanking E and I transcriptional silencers. The retrotransposon Ty5 preferentially integrates into regions of silent chromatin, and Ty5 insertions near the HMR-E silencer account for ≈2/100 of total transposition events. Most Ty5 insertions occur within 800 bp on either side of the autonomously replicating consensus sequence within HMR-E. Ty5 target preference is determined by silent chromatin, because integration near HMR-E is abolished in strains with silencer mutations that alleviate transcriptional repression.
机译:酿酒酵母的HML和HMR交配位点结合在沉默的染色质中,该染色质在侧翼的E和I转录沉默子处组装。逆转录转座子Ty5优先整合到沉默染色质区域中,靠近HMR-E沉默子的Ty5插入占总转座事件的约2/100。大多数Ty5插入发生在HMR-E中自主复制共有序列两侧的800 bp之内。 Ty5靶标的优先选择取决于沉默的染色质,因为在具有减轻转录抑制作用的沉默子突变的菌株中,HMR-E附近的整合被取消了。

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