The elongation rate of RNA polymerase determines the fate of transcribed nucleosomes.
The elongation rate of RNA polymerase determines the fate of transcribed nucleosomes.
复制标题
DOI:
10.1038/nsmb.2164
复制
发表时间:
2011-11-13
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
作者:
Upon transcription, histones can either detach from DNA or transfer behind the polymerase through a process believed to involve template looping. The details governing nucleosomal fate during transcription are not well understood. Our atomic force microscopy images of RNA polymerase II-nucleosome complexes confirm the presence of looped transcriptional intermediates and provide mechanistic insight into the histone-transfer process via the distribution of transcribed nucleosome positions. Significantly, we find that a fraction of the transcribed nucleosomes are remodeled to hexasomes, and that this fraction depends on the transcription elongation rate. A simple model involving the kinetic competition between transcription elongation, histone transfer, and histone-histone dissociation quantitatively rationalizes our observations and unifies results obtained with other polymerases. Factors affecting the relative magnitude of these processes provide the physical basis for nucleosomal fate during transcription and, therefore, for the regulation of gene expression.
登录
查看更多内容
影响因子:
5.6
作者:
Lowary, PT;Widom, J
通讯作者:
Widom, J
影响因子:
16
作者:
Bednar, J;Studitsky, VM;Woodcock, CL
通讯作者:
Woodcock, CL
DOI:
10.1083/jcb.153.7.1341
发表时间:
2001-06-25
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kimura H;Cook PR
通讯作者:
Cook PR
影响因子:
10.5
作者:
IZBAN, MG;LUSE, DS
通讯作者:
LUSE, DS
影响因子:
56.9
作者:
Cramer, P;Bushnell, DA;Kornberg, RD
通讯作者:
Kornberg, RD