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Molecular Mechanism for Axin1 and Axin2-mediated JNK Activation

Abstract

Axin是一种抑癌基因,在胚胎发育过程中控制体轴的形成。Axin是一种多功能的构架蛋白,在许多重要的信号传导途径中扮演着重要的角色:在Wnt信号通路中,Axin作为负调控因子与APC(adenomatouspolyposiscoli),GSK-3β(glycogensynthasekinase-3β),β-catenin形成蛋白复合体下调β-catenin的水平;在JNK信号通路中,Axin与MEKK1或MEKK4相互结合,激活JNK,诱导细胞凋亡;在TGF-β信号通路中,Axin通过与Smad3调节TGF-β的转录活性;在p53信号通路中,Axin与p53,HIPK2(homeodomain...Axin is a tumor suppressor gene, which plays a critical role in controlling axis formation during embryonic development. Axin serves as a scaffold protein in at least four different signaling pathways: Wnt, JNK (c-Jun NH2 terminal MAPK), TGF-β (transforming growth factorβ) and p53 signaling pathways. In the Wnt signaling pathway, Axin negatively regulates β-catenin by forming a large multimeric pr...学位:理学博士院系专业:生命科学学院生物学系_生物化学与分子生物学学号:B20032602

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