2021年1月4日 · In this report, we describe the properties of endogenous p62-bodies, the effect of autophagosome biogenesis on these bodies, and the in vivo significance of their turnover. p62-bodies are...

2016年12月13日 · The interactions of p62 and the UPS, autophagy and ubiquitinated proteins. Upon UPS inhibition, p62 is upregulated and phosphorylated on S405 and S409, which can facilitate the degradation of ubiquitinated cargoes via autophagy. p62 synthesis is induced by an increase in Nrf2 following UPS deficiency.

An increasing body of evidence indicates that ubiquitinated cargoes are important markers of degradation. p62, a classical receptor of autophagy, is a multifunctional protein located throughout the cell and involved in many signal transduction pathways, including the Keap1–Nrf2 pathway.

2019年12月11日 · Autophagy can degrade cargos with the help of selective autophagy receptors such as p62/SQSTM1, which facilitates the degradation of ubiquitinated cargo. While the process of autophagy has been...

2010年2月21日 · Toxic aggregate-prone proteins, invading microorganisms and damaged organelles are cleared from the cytoplasm by autophagy, a process that involves their engulfment by a double-membrane...

2016年12月13日 · When the cellular p62 level is manipulated, the quantity and location pattern of ubiquitinated proteins change with a considerable impact on cell survival. Altered p62 levels can even lead to some diseases. The proteotoxic stress imposed by proteasome inhibition can activate autophagy through p62 phosphorylation.

2024年6月12日 · As a major pillar of the proteostasis network, autophagy mediates the degradation of protein aggregates. The autophagy cargo receptor p62 recognizes ubiquitin on proteins and cooperates with TAX1BP1 to recruit the autophagy machinery. Paradoxically, protein aggregates are not degraded in various diseases despite p62 association.

In this review, we highlight recent advances in understanding the role of p62 in coordinating the ubiquitin-proteasome system and autophagy. We also discuss positive and negative effects of p62 on proteostatic status and their implications on aging and neurodegeneration.

Among autophagy-related molecules, p62/SQSTM1 is an adaptor for identifying and delivering intracellular cargo for degradation. Since ubiquitination is reversible, it has a switch role in autophagy. Ubiquitination is also involved in regulating autophagy in a timely manner.

Here, we present several protocols for monitoring autophagy-mediated degradation of p62 using Western blots, pulse-chase measurement of p62 half-life, immunofluorescence and immuno-electron microscopy, as well as live cell imaging with a pH-sensitive mCherry-GFP double tag.