Division of Cardiology, Department of Medicine, Johns Hopkins University, 720 Rutland Avenue, Baltimore, MD 21205, USA.
Trends Cell Biol. 2012 May;22(5):257-65. doi: 10.1016/j.tcb.2012.02.003. Epub 2012 Mar 5.
Notch is an ancient transmembrane receptor with crucial roles in cell-fate choices. Although the 'canonical' Notch pathway and its core members are well established - involving ligand-induced cleavage of Notch for transcriptional regulation - it has been unclear whether Notch can also function independently of ligand and transcription ('non-canonically') through a common mechanism. Recent studies suggest that Notch can non-canonically exert its biological functions by post-translationally targeting Wnt/β-catenin signaling, an important cellular and developmental regulator. The non-canonical Notch pathway appears to be highly conserved from flies to mammals. Here, we discuss the emerging conserved mechanism and role of ligand/transcription-independent Notch signaling in cell and developmental biology.
Notch 是一种古老的跨膜受体,在细胞命运选择中起着至关重要的作用。尽管“经典”Notch 途径及其核心成员已经得到充分证实——涉及配体诱导的 Notch 切割以进行转录调控——但 Notch 是否也可以通过共同的机制独立于配体和转录(“非经典”)发挥作用尚不清楚。最近的研究表明,Notch 可以通过翻译后靶向 Wnt/β-catenin 信号转导来发挥其生物学功能,Wnt/β-catenin 信号转导是一种重要的细胞和发育调节剂。非经典 Notch 途径似乎在从苍蝇到哺乳动物的过程中高度保守。在这里,我们讨论了配体/转录非依赖性 Notch 信号在细胞和发育生物学中的新兴保守机制和作用。