Recruitment of the ATP-dependent chromatin remodeler dMi-2 to the transcribed region of active heat shock genes.

Recruitment of the ATP-dependent chromatin remodeler dMi-2 to the transcribed region of active heat shock genes.
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DOI:
10.1093/nar/gks178
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发表时间:
2012-06
影响因子:
14.9
通讯作者:
Brehm A
Brehm A
中科院分区:
生物学2区
文献类型:
--
作者:
Mathieu EL;Finkernagel F;Murawska M;Scharfe M;Jarek M;Brehm A

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ATP依赖性染色质重塑因子dMi-2在基因转录中既可发挥正性作用,也可发挥负性作用。最近,我们已经表明,dMi-2招募热休克依赖性的方式的hsp 70基因,并需要达到高的转录水平。在这里,我们使用染色质免疫沉淀测序(ChIP-Seq),以确定其他染色质区域显示增加dMi-2结合热休克和表征dMi-2的分布热休克基因。我们发现,dMi-2被招募到至少七个热休克基因的身体。有趣的是,dMi-2结合延伸了数百个碱基对,超出多聚腺苷酸化位点,进入转录终止发生的区域。我们发现dMi-2不与整个核小体缺失的hsp 70位点87 A相关。相反,dMi-2结合仅限于转录区域。我们的研究结果表明,dMi-2分布在活跃的热休克基因的转录活性决定。
The ATP-dependent chromatin remodeler dMi-2 can play both positive and negative roles in gene transcription. Recently, we have shown that dMi-2 is recruited to the hsp70 gene in a heat shock-dependent manner, and is required to achieve high transcript levels. Here, we use chromatin immunoprecipitation sequencing (ChIP-Seq) to identify other chromatin regions displaying increased dMi-2 binding upon heat shock and to characterize the distribution of dMi-2 over heat shock genes. We show that dMi-2 is recruited to the body of at least seven heat shock genes. Interestingly, dMi-2 binding extends several hundred base pairs beyond the polyadenylation site into the region where transcriptional termination occurs. We find that dMi-2 does not associate with the entire nucleosome-depleted hsp70 locus 87A. Rather, dMi-2 binding is restricted to transcribed regions. Our results suggest that dMi-2 distribution over active heat shock genes are determined by transcriptional activity.
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