Alix differs from ESCRT proteins in the control of autophagy

Anne Petiot, Flavie Strappazzon, Christine Chatellard-Causse, Béatrice Blot, Sakina Torch, Verna Jean-Marc Verna, Rémy Sadoul

Research output: Contribution to journalArticle

Abstract

Alix/AIP1 is a cytosolic protein that regulates cell death through mechanisms that remain unclear. Alix binds to two protein members of the so-called Endosomal Sorting Complex Required for Transport (ESCRT), which facilitates membrane fission events during multivesicular endosome formation, enveloped virus budding and cytokinesis. Alix itself has been suggested to participate in these cellular events and is thus often considered to function in the ESCRT pathway. ESCRT proteins were recently implicated in autophagy, a process involved in bulk degradation of cytoplasmic constituents in lysosomes, which can also participate in cell death. In this study, we shown that, unlike ESCRT proteins, Alix is not involved in autophagy. These results strongly suggest that the capacity of several mutants of Alix to block both caspase-dependent and independent cell death does not relate to their capacity to modulate autophagy. Furthermore, they reinforce the conclusion of other studies demonstrating that the role of Alix is different from that of classical ESCRT proteins.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume375
Issue number1
DOIs
Publication statusPublished - Oct 10 2008

Keywords

  • Alix
  • Autophagy
  • Endocytosis
  • ESCRT
  • MVB

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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  • Cite this

    Petiot, A., Strappazzon, F., Chatellard-Causse, C., Blot, B., Torch, S., Jean-Marc Verna, V., & Sadoul, R. (2008). Alix differs from ESCRT proteins in the control of autophagy. Biochemical and Biophysical Research Communications, 375(1), 63-68. https://doi.org/10.1016/j.bbrc.2008.07.136