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Global and gene-specific analyses show distinct roles for Myod and Myog at a common set of promoters

机译:全局和基因特异性分析显示了Myod和Myog在一组共同的启动子上的不同作用

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摘要

We used a combination of genome-wide and promoter-specific DNA binding and expression analyses to assess the functional roles of Myod and Myog in regulating the program of skeletal muscle gene expression. Our findings indicate that Myod and Myog have distinct regulatory roles at a similar set of target genes. At genes expressed throughout the program of myogenic differentiation, Myod can bind and recruit histone acetyltransferases. At early targets, Myod is sufficient for near full expression, whereas, at late expressed genes, Myod initiates regional histone modification but is not sufficient for gene expression. At these late genes, Myog does not bind efficiently without Myod; however, transcriptional activation requires the combined activity of Myod and Myog. Therefore, the role of Myog in mediating terminal differentiation is, in part, to enhance expression of a subset of genes previously initiated by Myod.
机译:我们结合了全基因组和启动子特异性DNA结合及表达分析,以评估Myod和Myog在调节骨骼肌基因表达程序中的功能。我们的发现表明Myod和Myog在一组相似的靶基因上具有不同的调节作用。在整个肌原性分化程序中表达的基因上,Myod可以结合并募集组蛋白乙酰转移酶。在早期靶点,Myod足以实现近乎完整的表达,而在晚期表达的基因上,Myod可以启动区域性组蛋白修饰,但不足以进行基因表达。在这些晚期基因中,如果没有Myod,Myog无法有效结合。但是,转录激活需要Myod和Myog的联合活性。因此,Myog在介导终末分化中的作用部分是增强先前由Myod启动的基因子集的表达。

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