斑马鱼
安普克
高尔基体
细胞生物学
信号转导
蛋白激酶A
激酶
丝氨酸
调节器
磷酸化
生物
内质网
遗传学
基因
作者
Yingfeng Tu,Yang Qin,Min Tang,Lei Gao,Yuanhao Wang,Jiu-Qiang Wang,Zhe Liu,Xiaoyu Liu,Lejiao Mao,Rui Jia,Zhongwang Wang,Tie-Shan Tang,Pinglong Xu,Yan Liu,Lunzhi Dai,Da Jia
标识
DOI:10.1038/s41467-024-46166-2
摘要
Abstract Liver kinase B1 (LKB1), an evolutionarily conserved serine/threonine kinase, is a master regulator of the AMPK subfamily and controls cellular events such as polarity, proliferation, and energy homeostasis. Functions and mechanisms of the LKB1-AMPK axis at specific subcellular compartments, such as lysosome and mitochondria, have been established. AMPK is known to be activated at the Golgi; however, functions and regulatory mechanisms of the LKB1-AMPK axis at the Golgi apparatus remain elusive. Here, we show that TBC1D23, a Golgi-localized protein that is frequently mutated in the neurodevelopment disorder pontocerebellar hypoplasia (PCH), is specifically required for the LKB1 signaling at the Golgi. TBC1D23 directly interacts with LKB1 and recruits LKB1 to Golgi, promoting Golgi-specific activation of AMPK upon energy stress. Notably, Golgi-targeted expression of LKB1 rescues TBC1D23 deficiency in zebrafish models. Furthermore, the loss of LKB1 causes neurodevelopmental abnormalities in zebrafish, which partially recapitulates defects in TBC1D23-deficient zebrafish, and LKB1 sustains normal neuronal development via TBC1D23 interaction. Our study uncovers a regulatory mechanism of the LKB1 signaling, and reveals that a disrupted Golgi-LKB1 signaling underlies the pathogenesis of PCH.
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