Beclin1 controls the levels of p53 by regulating the deubiquitination activity of USP10 and USP13 Academic Article uri icon

Overview

MeSH Major

  • Apoptosis Regulatory Proteins
  • Benzylamines
  • Endopeptidases
  • Quinazolines
  • Tumor Suppressor Protein p53
  • Ubiquitin Thiolesterase

abstract

  • Autophagy is an important intracellular catabolic mechanism that mediates the degradation of cytoplasmic proteins and organelles. We report a potent small molecule inhibitor of autophagy named "spautin-1" for specific and potent autophagy inhibitor-1. Spautin-1 promotes the degradation of Vps34 PI3 kinase complexes by inhibiting two ubiquitin-specific peptidases, USP10 and USP13, that target the Beclin1 subunit of Vps34 complexes. Beclin1 is a tumor suppressor and frequently monoallelically lost in human cancers. Interestingly, Beclin1 also controls the protein stabilities of USP10 and USP13 by regulating their deubiquitinating activities. Since USP10 mediates the deubiquitination of p53, regulating deubiquitination activity of USP10 and USP13 by Beclin1 provides a mechanism for Beclin1 to control the levels of p53. Our study provides a molecular mechanism involving protein deubiquitination that connects two important tumor suppressors, p53 and Beclin1, and a potent small molecule inhibitor of autophagy as a possible lead compound for developing anticancer drugs.

publication date

  • September 30, 2011

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC3441147

Digital Object Identifier (DOI)

  • 10.1016/j.cell.2011.08.037

PubMed ID

  • 21962518

Additional Document Info

start page

  • 223

end page

  • 34

volume

  • 147

number

  • 1