期刊
CELL
卷 106, 期 6, 页码 685-696出版社
CELL PRESS
DOI: 10.1016/S0092-8674(01)00490-1
关键词
-
资金
- NIGMS NIH HHS [GM-54605] Funding Source: Medline
Here, we show that a nucleosome obstructing transcription from the IFN-beta promoter slides in vivo in response to virus infection, thus exposing the previously masked TATA box and the initiation site, a requirement for transcriptional activation. Our experiments also revealed that this mode of chromatin remodeling is a two-step reaction. First, the enhanceosome recruits the SWI/SNF chromatin-remodeling complex that modifies the nucleosome to allow binding of TBP. Second, DNA bending is induced by TBP binding, and the nucleosome slides to a new position. Experiments with other DNA binding proteins demonstrated a strong correlation between the ability to bend DNA and nucleosome sliding, suggesting that the sliding is induced by the bend.
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