Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy.
J Biol Chem. 2010 Oct 1;285(40):30814-24. doi: 10.1074/jbc.M110.142869. Epub 2010 Jun 14.
Zinc finger protein 423 encodes a 30 Zn-finger transcription factor involved in cerebellar and olfactory development. ZFP423 is a known interactor of SMAD1-SMAD4 and of Collier/Olf-1/EBF proteins, and acts as a modifier of retinoic acid-induced differentiation. In the present article, we show that ZFP423 interacts with the Notch1 intracellular domain in mammalian cell lines and in Xenopus neurula embryos, to activate the expression of the Notch1 target Hes5/ESR1. This effect is antagonized by EBF transcription factors, both in cultured cells and in Xenopus embryos, and amplified in vitro by BMP4, suggesting that ZFP423 acts to integrate BMP and Notch signaling, selectively promoting their convergence onto the Hes5 gene promoter.
锌指蛋白 423 编码一个包含 30 个锌指的转录因子,参与小脑和嗅觉的发育。ZFP423 是 SMAD1-SMAD4 和 Collier/Olf-1/EBF 蛋白的已知相互作用蛋白,作为维甲酸诱导分化的调节剂。在本文中,我们表明 ZFP423 在哺乳动物细胞系和非洲爪蟾神经胚胚胎中与 Notch1 细胞内结构域相互作用,激活 Notch1 靶基因 Hes5/ESR1 的表达。这种效应在培养细胞和非洲爪蟾胚胎中被 EBF 转录因子拮抗,并在体外被 BMP4 放大,表明 ZFP423 作用于整合 BMP 和 Notch 信号,选择性地促进它们在 Hes5 基因启动子上的汇聚。