Synergistic action of RNA polymerases in overcoming the nucleosomal barrier.

Synergistic action of RNA polymerases in overcoming the nucleosomal barrier.
复制标题

DOI:
10.1038/nsmb.1798
复制
发表时间:
2010-06
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

在基因表达过程中,RNA聚合酶(RNAP)在核小体遇到一个主要的障碍,但必须进入核小体DNA。体内证据表明,多个RNAP可能通过核小体增加转录效率。在这里,我们已经定量研究了这一假设使用E。coli RNAP作为模型系统,通过单分子DNA解链技术直接监测其在DNA上的位置。当RNAP遇到核小体时,它以独特的10-bp周期性暂停,并回溯约10-15 bp。当两个RNAP在附近延伸时,尾随的RNAP协助领先的RNAP延伸,减少其回溯并通过核小体增强其转录因子5。两者合计,我们的数据表明,组蛋白-DNA相互作用决定RNAP暂停行为,并减轻核小体诱导的回溯由多个聚合酶可能作为一种机制,克服核小体屏障在体内。
During gene expression, RNA polymerase (RNAP) encounters a major barrier at a nucleosome and yet must access the nucleosomal DNA. In vivo evidence suggests that multiple RNAPs might increase transcription efficiency through nucleosomes. Here we have quantitatively investigated this hypothesis using E. coli RNAP as a model system by directly monitoring its location on the DNA via a single molecule DNA unzipping technique. When an RNAP encountered a nucleosome, it paused with a distinctive 10-bp periodicity and was backtracked by ~10–15 bp. When two RNAPs elongated in close proximity, the trailing RNAP assisted the leading RNAP elongation, reducing its backtracking and enhancing its transcription through a nucleosome by a factor of 5. Taken together, our data indicate that histone-DNA interactions dictate RNAP pausing behavior, and alleviation of nucleosome-induced backtracking by multiple polymerases may serve as a mechanism for overcoming the nucleosomal barrier in vivo.
DOI: 10.1101/gad.5.4.683
发表时间: 1991-04-01
影响因子: 10.5
作者:
IZBAN, MG;LUSE, DS
通讯作者: LUSE, DS
DOI: 10.1073/pnas.87.15.5724
发表时间: 1990-08-01
影响因子: 11.1
作者:
DONG, F;HANSEN, JC;VANHOLDE, KE
通讯作者: VANHOLDE, KE
DOI: 10.1126/science.1172926
发表时间: 2009-07-31
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Hodges C;Bintu L;Lubkowska L;Kashlev M;Bustamante C
通讯作者: Bustamante C
DOI: 10.1093/emboj/cdg452
发表时间: 2003-09-15
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Epshtein, V;Toulmé, F;Nudler, E
通讯作者: Nudler, E
DOI: 10.1006/jmbi.2001.4528
发表时间: 2001-04-06
影响因子: 5.6
作者:
Anderson, JD;Lowary, PT;Widom, J
通讯作者: Widom, J