2. Academic Validation
  3. CLOCK regulates Drp1 mRNA stability and mitochondrial homeostasis by interacting with PUF60

CLOCK regulates Drp1 mRNA stability and mitochondrial homeostasis by interacting with PUF60

  • Cell Rep. 2022 Apr 12;39(2):110635. doi: 10.1016/j.celrep.2022.110635.
Lirong Xu 1,  Jiaxin Lin 1,  Yutong Liu 1,  Bingxuan Hua 2,  Qianyun Cheng 1,  Changpo Lin 3,  Zuoqin Yan 2,  Yaping Wang 4,  Ning Sun 5,  Ruizhe Qian 6,  Chao Lu 7
Affiliations

Affiliations

  • 1 Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.
  • 2 Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
  • 3 Institute of Vascular Surgery, Department of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
  • 4 Department of Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China.
  • 5 Wuxi School of Medicine, Jiangnan University, Jiangsu 214122, China. Electronic address: sunning@jiangnan.edu.cn.
  • 6 Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China. Electronic address: rzqian@shmu.edu.cn.
  • 7 Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China. Electronic address: luchao@shmu.edu.cn.
PMID: 35417690 DOI: 10.1016/j.celrep.2022.110635
Abstract

Circadian genes such as Clock, Bmal1, Cryptochrome1/2, and Period1/2/3 constitute the precise circadian system. ClockΔ19 is a commonly used mouse model harboring a circadian clock gene mutation, which lacks the EXON-19-encoded 51 Amino acids. Previous reports have shown that ClockΔ19 mice have severe metabolic abnormalities. Here, we report that the mitochondria of ClockΔ19 mice exhibit excessive fission and dysfunction. We also demonstrate that CLOCK binds to the RNA-binding protein PUF60 through its EXON 19. Further, we find that PUF60 directly maintains mitochondrial homeostasis through regulating Drp1 mRNA stability, while the association with CLOCK can competitively inhibit this function. In ClockΔ19 mice, CLOCKΔ19 releases PUF60, leading to enhanced Drp1 mRNA stability and persistent mitochondrial fission. Our results reveal a direct post-transcriptional role of CLOCK in regulating mitochondrial homeostasis via Drp1 mRNA stability and that the loss of EXON 19 of CLOCK in ClockΔ19 mice leads to severe mitochondrial homeostasis disorders.

Keywords

CP: Metabolism; CP: Molecular biology; Clock; Drp1; PUF60; mRNA stability; mitochondrial fission.

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