Recruitment timing and dynamics of transcription factors at the Hsp70 loci in living cells.
Recruitment timing and dynamics of transcription factors at the Hsp70 loci in living cells.
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DOI:
10.1016/j.molcel.2010.11.022
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发表时间:
2010-12-22
期刊:
影响因子:
16
通讯作者:
Lis JT
中科院分区:
文献类型:
--
作者:
Zobeck KL;Buckley MS;Zipfel WR;Lis JT
Chromatin immunoprecipitation (ChIP) studies provide snapshots of factors on chromatin in cell populations. Here, we use live cell imaging to examine at high temporal resolution the recruitment and dynamics of transcription factors to the inducible Hsp70 loci in individual Drosophila salivary gland nuclei. Recruitment of the master regulator, HSF, is first detected within 20 sec of gene activation and the timing of its recruitment resolves from RNA polymerase II and P-TEFb, and these factors resolve from Spt6 and Topo I. Remarkably, the recruitment of each factor is highly synchronous between different cells. In addition, Fluorescence Recovery after Photobleaching (FRAP) analyses show that the entry and exit of multiple factors are progressively constrained upon gene activation, suggesting the gradual formation of a transcription compartment. Furthermore, we demonstrate that PolyADP-Ribose (PAR) Polymerase activity is required to maintain the transcription compartment. We propose that PAR polymers locally retain factors in a transcription compartment.
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DOI:
10.1073/pnas.0509063102
发表时间:
2005-12-13
影响因子:
11.1
作者:
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DOI:
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期刊:
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DOI:
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发表时间:
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期刊:
Nature reviews. Genetics
影响因子:
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影响因子:
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