Transcription regulation during stable elongation by a reversible halt of RNA polymerase II

Transcription regulation during stable elongation by a reversible halt of RNA polymerase II
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RNA 聚合酶 II 可逆停止在稳定延伸过程中的转录调节

DOI:
10.1091/mbc.e14-02-0755
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发表时间:
2014
影响因子:
3.3
通讯作者:
U. Kubitscheck
U. Kubitscheck
中科院分区:
生物学3区
文献类型:
--
作者:
Kaminski;J.P. Siebrasse;U. Kubitscheck

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RNA聚合酶II(RNAPII)在转录过程中的调节对于控制基因表达是必不可少的。在这里,我们报告,RNAPII在Balbiani环2.1基因的转录活性可以停止在唾液腺细胞ofChironomus tentans幼虫在一个受调节的方式延长时间的稳定延长。转录停止是由热休克触发的,并影响所有RNAPII,而与它们在基因中的位置无关。在停止期间,不完整的转录本和RNAPII保留在转录位点,RNAPII的磷酸化状态没有改变,转录泡保持开放。停止转录的转录物在热休克缓解后恢复。观察到的机制允许细胞中断转录延长的时间段,并迅速重新激活它,而不需要重新启动完整基因的转录。我们的研究结果表明,在真核细胞的转录控制到目前为止未知的水平。
Regulation of RNA polymerase II (RNAPII) during transcription is essential for controlling gene expression. Here we report that the transcriptional activity of RNAPII at the Balbiani ring 2.1 gene could be halted during stable elongation in salivary gland cells ofChironomus tentanslarvae for extended time periods in a regulated manner. The transcription halt was triggered by heat shock and affected all RNAPII independently of their position in the gene. During the halt, incomplete transcripts and RNAPII remained at the transcription site, the phosphorylation state of RNAPII was unaltered, and the transcription bubbles remained open. The transcription of halted transcripts was resumed upon relief of the heat shock. The observed mechanism allows cells to interrupt transcription for extended time periods and rapidly reactivate it without the need to reinitiate transcription of the complete gene. Our results suggest a so-far-unknown level of transcriptional control in eukaryotic cells.
DOI: 10.1016/j.molcel.2009.06.009
发表时间: 2009-07-31
期刊: MOLECULAR CELL
影响因子: 16
作者:
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通讯作者: Svejstrup, Jesper Q.
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DOI: --
发表时间: 2008
影响因子: 4.8
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DOI: 10.1073/pnas.1201781109
发表时间: 2012-05
期刊: Proceedings of the National Academy of Sciences
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作者:
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DOI: 10.1016/s0092-8674(00)80980-0
发表时间: 1996-01-26
期刊: CELL
影响因子: 64.5
作者:
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通讯作者: Daneholt, B