Early steps in autophagy depend on direct phosphorylation of Atg9 by the Atg1 kinase

Abstract: Bulk degradation of cytoplasmic material is mediated by a highly conserved intracellular trafficking pathway termed autophagy. This pathway is characterized by the formation of double-membrane vesicles termed autophagosomes engulfing the substrate and transporting it to the vacuole/lysosome for breakdown and recycling. The Atg1/ULK1 kinase is essential for this process; however, little is known about its targets and the means by which it controls autophagy. Here we have screened for Atg1 kinase substrates using consensus peptide arrays and identified three components of the autophagy machinery. The multimembrane-spanning protein Atg9 is a direct target of this kinase essential for autophagy. Phosphorylated Atg9 is then required for the efficient recruitment of Atg8 and Atg18 to the site of autophagosome formation and subsequent expansion of the isolation membrane, a prerequisite for a functioning autophagy pathway. These findings show that the Atg1 kinase acts early in autophagy by regulating the outgrowth of autophagosomal membranes

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
ISSN: 1097-2765

Classification
Biowissenschaften, Biologie

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2024
Creator
Papinski, Daniel
Schuschnig, Martina
Reiter, Wolfgang
Wilhelm, Larissa
Barnes, Christopher A
Maiolica, Alessio
Hansmann, Isabella
Pfaffenwimmer, Thaddäus
Kijanska, Monika
Stoffel, Ingrid
Lee, Sung Sik
Brezovich, Andrea
Lou, Jane Hua
Turk, Benjamin E.
Aebersold, Rudolf
Ammerer, Gustav
Peter, Matthias
Kraft, Claudine

DOI
10.1016/j.molcel.2013.12.011
URN
urn:nbn:de:bsz:25-freidok-2441408
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:54 PM CET

Data provider

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Associated

  • Papinski, Daniel
  • Schuschnig, Martina
  • Reiter, Wolfgang
  • Wilhelm, Larissa
  • Barnes, Christopher A
  • Maiolica, Alessio
  • Hansmann, Isabella
  • Pfaffenwimmer, Thaddäus
  • Kijanska, Monika
  • Stoffel, Ingrid
  • Lee, Sung Sik
  • Brezovich, Andrea
  • Lou, Jane Hua
  • Turk, Benjamin E.
  • Aebersold, Rudolf
  • Ammerer, Gustav
  • Peter, Matthias
  • Kraft, Claudine
  • Universität

Time of origin

  • 2024

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