ZKSCAN3 is a master transcriptional repressor of autophagy.

ZKSCAN3 is a master transcriptional repressor of autophagy.
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DOI:
10.1016/j.molcel.2013.01.024
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发表时间:
2013-04-11
期刊:
影响因子:
16
通讯作者:
Boyd, Douglas D.
Boyd, Douglas D.
中科院分区:
生物学1区
文献类型:
--
作者:
Chauhan, Santosh;Goodwin, Jinesh G.;Chauhan, Swati;Manyam, Ganiraju;Wang, Jing;Kamat, Ashish M.;Boyd, Douglas D.

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自噬是一种重要的细胞保护机制,在正常/应激条件下,通过回收营养物质来清除受损成分并维持能量稳态。虽然自噬的核心成分已经得到了很好的研究,但在转录水平上对自噬的调控知之甚少。在此,我们建立ZKSCAN 3,锌指家族DNA结合蛋白,作为自噬的转录抑制因子。ZKSCAN 3的沉默诱导自噬并增加溶酶体生物合成。重要的是,我们发现ZKSCAN 3抑制了自噬和溶酶体生物发生/功能所必需的或调节的大基因集(>60)的转录,并且这些基因的子集,包括Map 11 C3 b和Wipi 2代表直接靶点。有趣的是,ZKSCAN 3和TFEB受饥饿的相反调节,反过来反过来又相反地调节溶酶体生物合成和自噬,这表明它们协同作用。总之,我们的研究揭示了一个自噬主开关调节自噬和溶酶体生物发生/功能不可或缺的基因转录网络的表达。
Autophagy constitutes a major cell protective mechanism eliminating damaged components and maintaining energy homoeostasis via recycling nutrients under normal/stressed conditions. Although the core components of autophagy have been well studied, regulation of autophagy at the transcriptional level is poorly understood. Herein, we establish ZKSCAN3, a zinc-finger family DNA-binding protein, as a transcriptional repressor of autophagy. Silencing of ZKSCAN3 induced autophagy and increased lysosome biogenesis. Importantly, we show that ZKSCAN3 represses transcription of a large gene set (>60) integral to, or regulatory for, autophagy and lysosome biogenesis/function and a subset of these genes, including Map1lC3b and Wipi2 represent direct targets. Interestingly, ZKSCAN3 and TFEB are oppositely regulated by starvation and in turn oppositely regulate lysosomal biogenesis and autophagy, suggesting that they act in conjunction. Altogether, our study uncovers an autophagy master-switch regulating the expression of a transcriptional network of genes integral to autophagy and lysosome biogenesis/function.
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