Cited by 101Cellular transport and secretionProtein Kinase Regulation and GTPase SignalingCalcium signaling and nucleotide metabolism

Two Rab2 Interactors Regulate Dense-Core Vesicle Maturation

Open access
Ailion, Michael, Hannemann, Mandy, Dalton, Susan, Pappas, Andrea, Watanabe, Shigeki, Hegermann, Jan, Liu, Qiang, Han, Hsiao-Fen +7 more·2014·Neuron

Abstract

Peptide neuromodulators are released from a unique organelle: the dense-core vesicle. Dense-core vesicles are generated at the trans-Golgi and then sort cargo during maturation before being secreted. To identify proteins that act in this pathway, we performed a genetic screen in Caenorhabditis elegans for mutants defective in dense-core vesicle function. We identified two conserved Rab2-binding proteins: RUND-1, a RUN domain protein, and CCCP-1, a coiled-coil protein. RUND-1 and CCCP-1 colocalize with RAB-2 at the Golgi, and rab-2, rund-1, and cccp-1 mutants have similar defects in sorting soluble and transmembrane dense-core vesicle cargos. RUND-1 also interacts with the Rab2 GAP protein TBC-8 and the BAR domain protein RIC-19, a RAB-2 effector. In summary, a pathway of conserved proteins controls the maturation of dense-core vesicles at the trans-Golgi network.

Integrity signals

Registry

Crossref · 10.1016/j.neuron.2014.02.017

Cites

91 of 91 references verified0 citation errors · 0 not checkable

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Claims the paper makes

16 of 20 cited sources checked · 10 supported · 0 flagged · accuracy not yet measured

  • Background

    Like rund-1 mutants, rab-2 mutants move little spontaneously on food but respond normally to UV stimulation.

    “Like rund-1, rab-2 mutants exhibit little spontaneous movement on food, but move normally when stimulated by UV light (Edwards et al., 2009).”
    Quote in the paperNot yet classified1 of 1 sources checked
    • cites Edwards et al., 2009 source
  • Background

    RAB-2 is a Golgi Rab in C. elegans that participates in dense-core vesicle maturation.

    “RAB-2 is a Golgi Rab that functions in DCV maturation in C. elegans (Edwards et al., 2009; Sumakovic et al., 2009).”
    Quote in the paperNot yet classified2 of 2 sources checked
    • cites Edwards et al., 2009 source
    • cites Sumakovic et al., 2009 source
  • Background

    Rab2 was first localized to the ER-Golgi intermediate compartment and proposed to act in ER-to-Golgi anterograde transport, though it is now known to be distributed more broadly across the Golgi.

    “Rab2 was originally localized to the ER-Golgi intermediate compartment (Chavrier et al., 1990) and was thought to function in ER to Golgi anterograde trafficking (Tisdale et al., 1992), but Rab2 is distributed more broadly across the Golgi and may have additional roles (Chun et al., 2008; Sumakovic et al., 2009).”
    Quote in the paperNot yet classified2 of 3 sources checked
    • cites Chavrier et al., 1990 source
    • cites Tisdale et al., 1992 source
    • cites Chun et al., 2008 source

      Chun et al. is cited for the final clause, alongside Sumakovic et al.; the earlier localization and anterograde-transport claims cite other papers. The Abstract and Discussion support an additional postendocytic role for UNC-108/Rab2, but our copy does not establish that Rab2 is distributed more broadly across the Golgi. No page numbers were supplied for these passages. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
  • Background

    Rab2 effectors include Golgi-associated coiled-coil proteins and the BAR domain protein ICA69/RIC-19.

    “Known effectors of Rab2 include several coiled-coil proteins associated with the Golgi (Hayes et al., 2009; Short et al., 2001; Sinka et al., 2008) and the BAR domain protein ICA69/RIC-19 (Buffa et al., 2008; Sumakovic et al., 2009).”
    Quote in the paperNot yet classified3 of 3 sources checked
    • cites Hayes et al., 2009 source
      Experimental — accuracy not yet measured
    • cites Short et al., 2001 source
      Experimental — accuracy not yet measured
    • cites Sinka et al., 2008 source
      Experimental — accuracy not yet measured
  • Background

    The RUN domain of TBC-8 also binds RIC-19.

    “The TBC-8 RUN domain also binds RIC-19 (Hannemann et al., 2012).”
    Quote in the paperNot yet classified1 of 1 sources checked
    • cites Hannemann et al., 2012 source

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Authors
Ailion, M., Hannemann, M., Dalton, S., Pappas, A., Watanabe, S., Hegermann, J., Liu, Q., Han, H.-F., Gu, M., Goulding, M. Q., Sasidharan, N., Schuske, K., Hullett, P., Eimer, S., & Jorgensen, E. M.
Affiliations
  • Howard Hughes Medical Institute (US)
  • European Neuroscience Institute Göttingen (DE)
  • University of Washington (US)
Corresponding author
Ailion, Michael
Venue
Neuron
Publisher
Elsevier BV
Published
2014-04
Volume
82
Issue
1
Pages
167-180
ISSN
0896-6273 (ISSN-L)
OpenAlex
W1976286688
Cited by
86
References
93
Citations by year
2026: 2 · 2025: 6 · 2024: 16 · 2023: 11 · 2022: 3 · 2021: 9 · 2020: 3 · 2019: 3 · 2018: 8 · 2017: 12 · 2016: 9 · 2015: 3
FWCI
3.99
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (P40OD010440)
  • National Institute of Mental Health (R00MH082109)
  • National Institute of Neurological Disorders and Stroke (R37NS034307, NS034307, R01NS034307)
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
Rab2, trans-Golgi network, cargo sorting, Caenorhabditis elegans, Golgi apparatus, BAR domain proteins
MeSH terms
Analysis of Variance, Animals, Chromosome Mapping, Cloning, Molecular, Golgi Apparatus, Molecular Sequence Data, Mutation, Endosomes, Caenorhabditis elegans, rab2 GTP-Binding Protein, Protein Transport, Secretory Vesicles, Caenorhabditis elegans Proteins, Animals, Genetically Modified, Microscopy, Electron, Transmission, Green Fluorescent Proteins

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