Cited by 270Autophagy in Disease and TherapyCellular transport and secretionCalcium signaling and nucleotide metabolism

Control of autophagy initiation by phosphoinositide 3‐phosphatase jumpy

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Vergne, Isabelle, Roberts, Esteban, Elmaoued, Rasha A, Tosch, Valérie, Delgado, Mónica A, Proikas‐Cezanne, Tassula, Laporte, Jocelyn, Deretic, Vojo·2009·The EMBO Journal

Abstract

The majority of studies on autophagy, a cytoplasmic homeostasis pathway of broad biological and medical significance, have been hitherto focused on the phosphatidylinositol 3-kinases as the regulators of autophagy. Here, we addressed the reverse process driven by phosphoinositide phosphatases and uncovered a key negative regulatory role in autophagy of a phosphatidylinositol 3-phosphate (PI3P) phosphatase Jumpy (MTMR14). Jumpy associated with autophagic isolation membranes and early autophagosomes, defined by the key factor Atg16 necessary for proper localization and development of autophagic organelles. Jumpy orchestrated orderly succession of Atg factors by controlling recruitment to autophagic membranes of the sole mammalian Atg factor that interacts with PI3P, WIPI-1 (Atg18), and by affecting the distribution of Atg9 and LC3, the two Atg factors controlling organization and growth of autophagic membranes. A catalytically inactive Jumpy mutant, R336Q, found in congenital disease centronuclear myopathy, lost the ability to negatively regulate autophagy. This work reports for the first time that initiation of autophagy is controlled not only by the forward reaction of generating PI3P through a lipid kinase but that its levels are controlled by a specific PI3P phosphatase, which when defective can lead to human disease.

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Crossref · 10.1038/emboj.2009.159

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  • Autophagy is regulated by distinct mechanisms in different cell types, and these cell type-specific mechanisms underlie the differential vulnerability of separate tissues to autophagy mutations, resulting in heterogeneous manifestations of disease.

    “Furthermore, mounting evidence shows that autophagy is regulated by distinct mechanisms in different cell types [11–26], and these cell type-specific mechanisms underlie the differential vulnerability of separate tissues to autophagy mutations, resulting in heterogenous manifestations of disease.”
  • Centronuclear myopathy is caused by mutations in the genes encoding MTM1 or MTMR14/Jumpy.

    “For instance, centronuclear myopathy is caused by mutations in the genes encoding MTM1 (myotubularin1) or MTMR14/Jumpy (myotubularin related protein 14) [17,20].”
  • Loss-of-function mutations in MTM1 or MTMR14 prevent these enzymes from metabolizing phosphoinositides required for autophagy, thereby disinhibiting autophagy flux and muscle atrophy.

    “These loss-of-function mutations prevent these enzymes from metabolizing phosphoinositides required for autophagy, thereby disinhibiting autophagy flux and muscle atrophy [17,20].”

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Authors
Vergne, I., Roberts, E., Elmaoued, R. A., Tosch, V., Delgado, M. A., Proikas‐Cezanne, T., Laporte, J., & Deretic, V.
Affiliations
  • University of New Mexico (US)
  • Centre National de la Recherche Scientifique (FR)
  • University of Tübingen (DE)
Corresponding author
  • Vergne, Isabelle
  • Deretic, Vojo
Venue
The EMBO Journal
Published
2009-07-09
Volume
28
Issue
15
Pages
2244-2258
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2103545941
Cited by
270
References
55
Citations by year
2026: 7 · 2025: 5 · 2024: 8 · 2023: 7 · 2022: 5 · 2021: 12 · 2020: 6 · 2019: 12 · 2018: 11 · 2017: 13 · 2016: 23 · 2015: 22 · 2014: 25 · 2013: 22 · 2012: 29
FWCI
20.69
Type
journal article
Language
en
Update notices
erratum (2009-09-10)
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft (SFB 773)
  • Agence Nationale de la Recherche
  • Institut National de la Santé et de la Recherche Médicale
  • Centre National de la Recherche Scientifique
  • National Institutes of Health
  • School of Medicine, University of New Mexico
  • National Institute of Allergy and Infectious Diseases (R01AI042999, AI 45148, R01AI045148, R37AI042999)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
autophagy initiation, Atg16, Atg9, LC3, autophagosome formation, centronuclear myopathy, phosphatidylinositol 3-phosphate
MeSH terms
Animals, Autophagy, Cell Line, Humans, Molecular Sequence Data, Phosphoric Monoester Hydrolases, Sequence Analysis, DNA, Amino Acid Substitution, Mutation, Missense, Myopathies, Structural, Congenital, Mice

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