Chromatin decondensation is sufficient to alter nuclear organization in embryonic stem cells.
Chromatin decondensation is sufficient to alter nuclear organization in embryonic stem cells.
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DOI:
10.1126/science.1259587
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发表时间:
2014-12-05
期刊:
影响因子:
--
通讯作者:
Bickmore WA
中科院分区:
文献类型:
--
作者:
Therizols P;Illingworth RS;Courilleau C;Boyle S;Wood AJ;Bickmore WA
During differentiation thousands of genes are repositioned toward or away from the nuclear envelope. These movements correlate with changes in transcription and replication timing. Here, using synthetic transcription factors (TALE-TFs) we show that transcriptional activation of endogenous genes by a viral trans-activator is sufficient to induce gene repositioning toward the nuclear interior. However, gene relocation is also induced by recruitment of an acidic peptide that decondenses chromatin without affecting transcription, indicating that nuclear reorganization is driven by chromatin remodeling rather than transcription. We identify an epigenetic memory of gene activation, which maintains central nuclear positioning through mitosis even after the TALE-TF is lost. Finally, we demonstrate that transcription activation, but not chromatin decondensation, is sufficient to change replication timing.
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