Transcriptional regulation of graded Hedgehog signaling.

Transcriptional regulation of graded Hedgehog signaling.
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DOI:
10.1016/j.semcdb.2014.05.010
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发表时间:
2014-09
影响因子:
7.3
通讯作者:
Vokes, Steven A.
Vokes, Steven A.
中科院分区:
生物学2区
文献类型:
--
作者:
Falkenstein, Kristin N.;Vokes, Steven A.

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Hedgehog(HH)途径在调节不同的发育过程中发挥着保守的作用。在某些发育环境中,HH蛋白的梯度以剂量依赖的方式指定多种细胞类型,从而起到形态生成物的作用。HH信号最终通过GLI蛋白作用于转录水平。在HH信号存在的情况下,全长GLI蛋白作为靶基因的转录激活因子。相反,在没有HH的情况下,GLI蛋白充当转录抑制因子。这篇综述将重点介绍分级的HH信号如何转化为不同的GLI活性并被解释为不同的转录反应的机制。
The Hedgehog (Hh) pathway plays conserved roles in regulating a diverse spectrum of developmental processes. In some developmental contexts, a gradient of Hh protein specifies multiple cell types in a dose-dependent fashion, thereby acting as a morphogen. Hh signaling ultimately acts on the transcriptional level through GLI proteins. In the presence of Hh signaling full length GLI proteins act as transcriptional activators of target genes. Conversely, in the absence of Hh, GLI proteins act as transcriptional repressors. This review will highlight mechanisms contributing to how graded Hh signaling might translate to differential GLI activity and be interpreted into distinct transcriptional responses.
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