Cited by 854Cellular transport and secretionAutophagy in Disease and TherapyCalcium signaling and nucleotide metabolism

The Rab5 effector EEA1 is a core component of endosome docking

Christoforidis, Savvas, McBride, Heidi M., Burgoyne, Robert D., Zerial, Marino·1999·Nature

Abstract

Intracellular membrane docking and fusion requires the interplay between soluble factors and SNAREs. The SNARE hypothesis postulates that pairing between a vesicular v-SNARE and a target membrane z-SNARE is the primary molecular interaction underlying the specificity of vesicle targeting as well as lipid bilayer fusion. This proposal is supported by recent studies using a minimal artificial system. However, several observations demonstrate that SNAREs function at multiple transport steps and can pair promiscuously, questioning the role of SNAREs in conveying vesicle targeting. Moreover, other proteins have been shown to be important in membrane docking or tethering. Therefore, if the minimal machinery is defined as the set of proteins sufficient to reproduce in vitro the fidelity of vesicle targeting, docking and fusion as in vivo, then SNAREs are not sufficient to specify vesicle targeting. Endosome fusion also requires cytosolic factors and is regulated by the small GTPase Rab5. Here we show that Rab5-interacting soluble proteins can completely substitute for cytosol in an in vivo endosome-fusion assay, and that the Rab5 effector EEA1 is the only factor necessary to confer minimal fusion activity. Rab5 and other associated proteins seem to act upstream of EEA1, implying that Rab5 effectors comprise both regulatory molecules and mechanical components of the membrane transport machinery. We further show that EEA1 mediates endosome docking and, together with SNAREs, leads to membrane fusion.

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Crossref · 10.1038/17618

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  • Rab5A is a marker of early phagosomes and facilitates downstream maturation by recruiting EEA1, which then binds NSF, Rabex5, and Rabaptin-5 and subsequently syntaxin13 to form a fusogenic complex with endosomes.

    “The small GTPase Rab5A is a marker of early phagosomes and facilitates downstream maturation by recruiting early endosomal antigen 1 (EEA1), which then binds NSF, Rabex5, and Rabaptin-5 and subsequently syntaxin13 to form a fusogenic complex with endosomes (22–24).”

    From Macrophage defense mechanisms against intracellular bacteria (2015) · cites this paper as [23]

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Authors
Christoforidis, S., McBride, H. M., Burgoyne, R. D., & Zerial, M.
Affiliations
  • European Molecular Biology Laboratory (DE)
  • University of Liverpool (GB)
Corresponding author
Zerial, Marino
Venue
Nature
Published
1999-02
Volume
397
Issue
6720
Pages
621-625
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1595436183
Cited by
854
References
30
Citations by year
2026: 7 · 2025: 14 · 2024: 32 · 2023: 23 · 2022: 21 · 2021: 39 · 2020: 25 · 2019: 32 · 2018: 26 · 2017: 25 · 2016: 26 · 2015: 20 · 2014: 27 · 2013: 36 · 2012: 27
FWCI
21.53
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
EEA1, Rab5, membrane fusion, SNARE proteins, vesicle targeting, small GTPases, endosomal transport, lipid bilayer fusion
MeSH terms
Adenosine Triphosphate, Animals, Cattle, Chromatography, Affinity, Chromatography, Agarose, Cytosol, HeLa Cells, Humans, Intracellular Membranes, Membrane Fusion, Membrane Proteins, Protein Binding, Endosomes, Recombinant Fusion Proteins, GTP-Binding Proteins, rab5 GTP-Binding Proteins, Vesicular Transport Proteins, SNARE Proteins

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