Cited by 204Cellular transport and secretionProtein Kinase Regulation and GTPase SignalingCalcium signaling and nucleotide metabolism

Analysis of GTPase-activating proteins: Rab1 and Rab43 are key Rabs required to maintain a functional Golgi complex in human cells

Haas, Alexander K., Yoshimura, Shin-ichiro, Stephens, David J., Preisinger, Christian, Fuchs, Evelyn, Barr, Francis A.·2007·Journal of Cell Science

Abstract

Rab GTPases control vesicle movement and tethering membrane events in membrane trafficking. We used the 38 human Rab GTPase activating proteins (GAPs) to identify which of the 60 Rabs encoded in the human genome function at the Golgi complex. Surprisingly, this screen identified only two GAPs, RN-tre and TBC1D20, disrupting both Golgi organization and protein transport. RN-tre is the GAP for Rab43, and controls retrograde transport into the Golgi from the endocytic pathway. TBC1D20 is the ER-localized GAP for Rab1, and is the only GAP blocking the delivery of secretory cargo from the ER to the cell surface. Strikingly, its expression causes the loss of the Golgi complex, highlighting the importance of Rab1 for Golgi biogenesis. These effects can be antagonized by reticulon, a binding partner for TBC1D20 in the ER. Together, these findings indicate that Rab1 and Rab43 are key Rabs required for the biogenesis and maintenance of a functional Golgi structure, and suggest that other Rabs acting at the Golgi complex are likely to be functionally redundant.

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Crossref · 10.1242/jcs.014225

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Authors
Haas, A. K., Yoshimura, S.-I., Stephens, D. J., Preisinger, C., Fuchs, E., & Barr, F. A.
Affiliations
  • University of Liverpool (GB)
  • University of Bristol (GB)
  • Max Planck Institute of Biochemistry (DE)
Corresponding author
Barr, Francis A.
Venue
Journal of Cell Science
Published
2007-09-01
Volume
120
Issue
17
Pages
2997-3010
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2064782801
Cited by
201
References
56
Citations by year
2025: 8 · 2024: 5 · 2023: 8 · 2022: 7 · 2021: 11 · 2020: 8 · 2019: 10 · 2018: 9 · 2017: 10 · 2016: 16 · 2015: 9 · 2014: 13 · 2013: 15 · 2012: 21
FWCI
4.81
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cell Science (publishedVersion)
  • PubMed (publishedVersion)
  • Explore Bristol Research (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • Bristol Research (University of Bristol) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
Rab GTPases, Rab1, Rab GTPase-activating protein, reticulons, retrograde transport, secretory pathway, ER-Golgi transport, membrane trafficking, functional redundancy
MeSH terms
rab11 GTP-Binding Proteins, Animals, Biological Transport, Endoplasmic Reticulum, Golgi Apparatus, HeLa Cells, Humans, Nerve Tissue Proteins, Phenotype, Recombinant Fusion Proteins, Genome, Human, rab GTP-Binding Proteins, rab1 GTP-Binding Proteins, Two-Hybrid System Techniques, RNA Interference

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