Cited by 792Autophagy in Disease and TherapyCellular transport and secretionCalcium signaling and nucleotide metabolism

Beclin1-binding UVRAG targets the class C Vps complex to coordinate autophagosome maturation and endocytic trafficking

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Liang, Chengyu, Lee, Jong-soo, Inn, Kyung-Soo, Gack, Michaela U., Li, Qinglin, Roberts, Esteban A., Vergne, Isabelle, Deretic, Vojo +3 more·2008·Nature Cell Biology

Abstract

Autophagic and endocytic pathways are tightly regulated membrane rearrangement processes that are crucial for homeostasis, development and disease. Autophagic cargo is delivered from autophagosomes to lysosomes for degradation through a complex process that topologically resembles endosomal maturation. Here, we report that a Beclin1-binding autophagic tumour suppressor, UVRAG, interacts with the class C Vps complex, a key component of the endosomal fusion machinery. This interaction stimulates Rab7 GTPase activity and autophagosome fusion with late endosomes/lysosomes, thereby enhancing delivery and degradation of autophagic cargo. Furthermore, the UVRAG-class-C-Vps complex accelerates endosome-endosome fusion, resulting in rapid degradation of endocytic cargo. Remarkably, autophagosome/endosome maturation mediated by the UVRAG-class-C-Vps complex is genetically separable from UVRAG-Beclin1-mediated autophagosome formation. This result indicates that UVRAG functions as a multivalent trafficking effector that regulates not only two important steps of autophagy - autophagosome formation and maturation - but also endosomal fusion, which concomitantly promotes transport of autophagic and endocytic cargo to the degradative compartments.

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  • Fusion of autophagosomes with lysosomes is mediated by the HOPS complex, whose subunits include VPS11, VPS16, VPS18, VPS33A, VPS39, and VPS41.

    “Fusion of the autophagosome and lysosome is mediated by the homotypic fusion and protein sorting (HOPS) complex, whose subunits include VPS11, VPS16, VPS18, VPS33A, VPS39, and VPS41 [45,46].”

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Authors
Liang, C., Lee, J.-S., Inn, K.-S., Gack, M. U., Li, Q., Roberts, E. A., Vergne, I., Deretic, V., Feng, P., Akazawa, C., & Jung, J. U.
Affiliations
  • University of Southern California (US)
  • Harvard University (US)
  • University of New Mexico (US)
  • The University of Texas Southwestern Medical Center (US)
  • Tokyo Medical and Dental University (JP)
Corresponding author
Jung, Jae U.
Venue
Nature Cell Biology
Published
2008-06-15
Volume
10
Issue
7
Pages
776-787
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2155175976
Cited by
792
References
47
Citations by year
2026: 16 · 2025: 30 · 2024: 21 · 2023: 36 · 2022: 37 · 2021: 55 · 2020: 45 · 2019: 51 · 2018: 49 · 2017: 46 · 2016: 46 · 2015: 45 · 2014: 61 · 2013: 55 · 2012: 60
FWCI
34.39
Type
journal article
Language
en
Open access
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL110609)
  • National Cancer Institute (CA82057, CA 106156, R01CA091819, CA-31363, R01CA106156, R01CA082057, CA-91819, R01CA031363)
  • National Institute of Allergy and Infectious Diseases (AI069345, R01AI073099, AI42999, R01AI042999, R01AI069345, R37AI042999)
  • National Center for Research Resources (RR00 168, K26RR000168, P51RR000168)
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
UVRAG, Beclin-1, autophagosome maturation, endosomal membrane fusion, autophagosome-lysosome fusion, endosomal trafficking, autophagy, membrane trafficking
MeSH terms
Beclin-1, Animals, Autophagy, Cell Line, Endocytosis, Humans, Lysosomes, Membrane Fusion, Membrane Proteins, Phagosomes, Endosomes, Recombinant Fusion Proteins, rab GTP-Binding Proteins, Protein Transport, Tumor Suppressor Proteins, Vesicular Transport Proteins, Multiprotein Complexes, Apoptosis Regulatory Proteins, Mice

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