A common set of DNA regulatory elements shapes Drosophila appendages.

A common set of DNA regulatory elements shapes Drosophila appendages.
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一组常见的 DNA 调控元件塑造了果蝇的附属物。

DOI:
10.1016/j.devcel.2013.10.009
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发表时间:
2013-11-11
期刊:
影响因子:
11.8
通讯作者:
Lieb JD
Lieb JD
中科院分区:
生物学1区
文献类型:
--
作者:
McKay DJ;Lieb JD

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动物具有由位于不同轴向位置的相似细胞类型组成的身体部位(例如四肢)。每个结构的身份和独特的形态通常由不同的“主调节”转录因子的活性指定。虽然在由相似细胞类型组成的身体部位之间观察到基因表达的相似性,但尚不清楚基因组中的调控信息如何被差异化地利用来创造发育中的形态多样性结构。在这里,我们使用全基因组开放染色质分析表明,在果蝇的附属物,相同的DNA调控模块是整个基因组在给定的发展阶段,除了在基因座编码的主调节器本身。此外,虽然开放的染色质轮廓随着发育时间的推移而变化,但这些变化在不同的附属物之间是协调的。我们建议,主调节器通过差异影响同一组DNA调控模块的功能来创建形态上不同的结构。
Animals have body parts made of similar cell types located at different axial positions (e.g. limbs). The identity and distinct morphology of each structure is often specified by the activity of different “master regulator” transcription factors. Although similarities in gene expression have been observed between body parts made of similar cell types, it is not known how regulatory information in the genome is differentially utilized to create morphologically diverse structures in development. Here, we use genome-wide open chromatin profiling to show that among the Drosophila appendages, the same DNA regulatory modules are accessible throughout the genome at a given stage of development, except at the loci encoding the master regulators themselves. In addition, while open chromatin profiles change over developmental time, these changes are coordinated between different appendages. We propose that master regulators create morphologically distinct structures by differentially influencing the function of the same set of DNA regulatory modules.
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