생화학분자생물학회

	Name: Kwang Chul Chung ( kchung@yonsei.ac.kr )
	2002-Present	Professor, Department of Systems Biology, Yonsei University
	1997-2002	Assistant Professor, Department of Pharmacology, Yonsei University College of Medicine
	1995-1997	Postdoctoral Research Fellow, University of Chicago, USA
	1989-1994	Ph.D., Institute for Neuroscience, Northwestern University, USA
	Name: Ga Hyun Park ( gahyun3@gmail.com )
	2018-Present	M.S./Ph.D. Integrated program, Department of Systems Biology, Yonsei University
	2011-2015	B.S., Department of Biological Science, University of Missouri-Columbia, USA
	Name: Joon Hyung Park ( lu-ch@daum.net )
	2018-Present	M.S./Ph.D. Integrated program, Department of Systems Biology, Yonsei University
	2013-2018	B.S., Department of Bioscience, Kongju National University

Precise control of mitophagy through ubiquitin proteasome system and deubiquitin proteases and their dysfunction in Parkinson’s disease

Parkinson’s disease (PD) is one of the most common neurodegenerative diseases in the elderly population and is caused by the loss of dopaminergic neurons. PD has been predominantly attributed to mitochondrial dysfunction. The structural alteration of α-synuclein triggers toxic oligomer formation in the neurons, which greatly contributes to PD. In this article, we discuss the role of several familial PD-related proteins, such as α-synuclein, DJ-1, LRRK2, PINK1, and parkin in mitophagy, which entails a selective degradation of mitochondria via autophagy. Defective changes in mitochondrial dynamics and their biochemical and functional interaction induce the formation of toxic α-synuclein-containing protein aggregates in PD. In addition, these gene products play an essential role in ubiquitin proteasome system (UPS)-mediated proteolysis as well as mitophagy. Interestingly, a few deubiquitinating enzymes (DUBs) additionally modulate these two pathways negatively or positively. Based on these findings, we summarize the close relationship between several DUBs and the precise modulation of mitophagy. For example, the USP8, USP10, and USP15, among many DUBs are reported to specifically regulate the K48- or K63-linked de-ubiquitination reactions of several target proteins associated with the mitophagic process, in turn upregulating the mitophagy and protecting neuronal cells from α-synuclein-derived toxicity. In contrast, USP30 inhibits mitophagy by opposing parkin-mediated ubiquitination of target proteins. Furthermore, the association between these changes and PD pathogenesis will be discussed. Taken together, although the functional roles of several PD-related genes have yet to be fully understood, they are substantially associated with mitochondrial quality control as well as UPS. Therefore, a better understanding of their relationship provides valuable therapeutic clues for appropriate management strategies.


BMB Rep. 2021 Oct 22;5426. Online ahead of print.
https://pubmed.ncbi.nlm.nih.gov/34674795/