CREB and the CRTC co-activators: sensors for hormonal and metabolic signals.

CREB and the CRTC co-activators: sensors for hormonal and metabolic signals.
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DOI:
10.1038/nrm3072
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发表时间:
2011-03
期刊:
Nature reviews. Molecular cell biology
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环腺苷酸反应元件结合蛋白(CREB)是磷酸化的反应,以各种各样的信号,但靶基因转录仅在一个子集的情况下增加。最近的研究表明,CREB的功能与一个家庭的潜在的细胞质共激活因子称为cAMP调节的转录共激活因子(CRTCs),这是通过去磷酸化激活。CREB磷酸化和CRTC去磷酸化的双重要求可能解释了这些激活子-共激活子同源物如何区分不同的刺激。CREB和CRTCs激活后,介导禁食和进食信号对胰岛素敏感组织中代谢程序表达的影响。
The cyclic AMP-responsive element-binding protein (CREB) is phosphorylated in response to a wide variety of signals, yet target gene transcription is only increased in a subset of cases. Recent studies indicate that CREB functions in concert with a family of latent cytoplasmic co-activators called cAMP-regulated transcriptional co-activators (CRTCs), which are activated through dephosphorylation. A dual requirement for CREB phosphorylation and CRTC dephosphorylation is likely to explain how these activator–co-activator cognates discriminate between different stimuli. Following their activation, CREB and CRTCs mediate the effects of fasting and feeding signals on the expression of metabolic programmes in insulin-sensitive tissues.
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