3D chromatin interactions organize Yan chromatin occupancy and repression at the even-skipped locus.

3D chromatin interactions organize Yan chromatin occupancy and repression at the even-skipped locus.
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DOI:
10.1101/gad.225789.113
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发表时间:
2013-11-01
影响因子:
10.5
通讯作者:
Rebay I
Rebay I
中科院分区:
生物学1区
文献类型:
--
作者:
Webber JL;Zhang J;Mitchell-Dick A;Rebay I

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Long-range integration of transcriptional inputs is critical for gene expression, yet the mechanisms are poorly understood. Here, Webber et al. investigate how cis-regulatory elements at the even-skipped (eve) locus coordinate heart-specific gene expression. Targeted deletions of regions bound by the repressor Yan define two novel enhancers that contribute repressive inputs to stabilize tissue-specific output from a third enhancer. This study provides a new paradigm for chromatin-level integration of repressive inputs with specific patterning information to achieve robust gene expression. Long-range integration of transcriptional inputs is critical for gene expression, yet the mechanisms remain poorly understood. We investigated the molecular determinants that confer fidelity to expression of the heart identity gene even-skipped (eve). Targeted deletion of regions bound by the repressor Yan defined two novel enhancers that contribute repressive inputs to stabilize tissue-specific output from a third enhancer. Deletion of any individual enhancer reduced Yan occupancy at the other elements, impacting eve expression, cell fate specification, and cardiac function. These long-range interactions may be stabilized by three-dimensional chromatin contacts that we detected between the elements. Our work provides a new paradigm for chromatin-level integration of general repressive inputs with specific patterning information to achieve robust gene expression.
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