Synergistic action of RNA polymerases in overcoming the nucleosomal barrier.
Synergistic action of RNA polymerases in overcoming the nucleosomal barrier.
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DOI:
10.1038/nsmb.1798
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发表时间:
2010-06
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
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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.
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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
影响因子:
11.4
作者:
Epshtein, V;Toulmé, F;Nudler, E
通讯作者:
Nudler, E
影响因子:
5.6
作者:
Anderson, JD;Lowary, PT;Widom, J
通讯作者:
Widom, J