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Rap-linked cAMP signaling Epac proteins: Compartmentation, functioning and disease implications

机译:说唱链接的cAMP信号Epac蛋白:隔室,功能和疾病的影响

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摘要

Epac proteins respond to the second messenger cyclic AMP (cAMP) and are activated by Gs coupled receptors. They act as specific guanine nucleotide exchange factors (GEFs) for the small G proteins, Rap1 and Rap2 of the Ras family. A plethora of studies using 8-pCPT-2'-O-Me-cAMP, an Epac agonist, has revealed the importance of these multi-domain proteins in the control of key cellular functions such as cell division, migration, growth and secretion. Epac and protein kinase A (PKA) may act independently but are often associated with the same biological process, in which they fulfill either synergistic or opposite effects. In addition, compelling evidence is now accumulating about the formation of molecular complexes in distinct cellular compartments that influence Epac signaling and cellular function. Epac is spatially and temporally regulated by scaffold protein and its effectors are interconnected with other signaling pathways. Pathophysiological changes in Epac signaling may underlie certain diseases.
机译:Epac蛋白响应第二信使环AMP(cAMP),并被Gs偶联受体激活。它们充当Ras家族小G蛋白Rap1和Rap2的特异性鸟嘌呤核苷酸交换因子(GEF)。使用Epac激动剂8-pCPT-2'-O-Me-cAMP进行的大量研究揭示了这些多域蛋白在控制关键细胞功能(如细胞分裂,迁移,生长和分泌)中的重要性。 Epac和蛋白激酶A(PKA)可以独立发挥作用,但通常与它们共同发挥协同作用或相反作用的同一生物学过程有关。另外,关于在影响Epac信号传导和细胞功能的不同细胞区室中形成分子复合物的证据越来越多。 Epac在空间和时间上受到支架蛋白的调控,其效应子与其他信号通路相互联系。 Epac信号传导的病理生理变化可能是某些疾病的基础。

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