Cited by 137Cell death mechanisms and regulationAxon Guidance and Neuronal SignalingCancer-related Molecular Pathways

The Dependence Receptor UNC5H2/B Triggers Apoptosis via PP2A-Mediated Dephosphorylation of DAP Kinase

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Guenebeaud, Céline, Goldschneider, David, Castets, Marie, Guix, Catherine, Chazot, Guillaume, Delloye-Bourgeois, Céline, Eisenberg-Lerner, Avital, Shohat, Galit +5 more·2010·Molecular Cell

Abstract

The UNC5H dependence receptors promote apoptosis in the absence of their ligand, netrin-1, and this is important for neuronal and vascular development and for limitation of cancer progression. UNC5H2 (also called UNC5B) triggers cell death through the activation of the serine-threonine protein kinase DAPk. While performing a siRNA screen to identify genes implicated in UNC5H-induced apoptosis, we identified the structural subunit PR65β of the holoenzyme protein phosphatase 2A (PP2A). We show that UNC5H2/B recruits a protein complex that includes PR65β and DAPk and retains PP2A activity. PP2A activity is required for UNC5H2/B-induced apoptosis, since it activates DAPk by triggering its dephosphorylation. Moreover, netrin-1 binding to UNC5H2/B prevents this effect through interaction of the PP2A inhibitor CIP2A to UNC5H2/B. Thus we show here that, in the absence of netrin-1, recruitment of PP2A to UNC5H2/B allows the activation of DAPk via a PP2A-mediated dephosphorylation and that this mechanism is involved in angiogenesis regulation.

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Crossref · 10.1016/j.molcel.2010.11.021

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Authors
Guenebeaud, C., Goldschneider, D., Castets, M., Guix, C., Chazot, G., Delloye-Bourgeois, C., Eisenberg-Lerner, A., Shohat, G., Zhang, M., Laudet, V., Kimchi, A., Bernet, A., & Mehlen, P.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Hong Kong University of Science and Technology (HK)
  • École Normale Supérieure de Lyon (FR)
  • Weizmann Institute of Science (IL)
Corresponding author
Mehlen, Patrick
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2010-12
Volume
40
Issue
6
Pages
863-876
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2142296555
Cited by
137
References
62
Citations by year
2026: 3 · 2025: 7 · 2024: 5 · 2023: 5 · 2022: 9 · 2021: 4 · 2020: 13 · 2019: 6 · 2018: 9 · 2017: 8 · 2016: 10 · 2015: 9 · 2014: 10 · 2013: 14 · 2012: 17
FWCI
5.08
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
UNC5B, dependence receptors, DAP kinase, protein phosphatase 2A, PP2A dephosphorylation, CIP2A, netrin-1, apoptosis, angiogenesis, siRNA screen
MeSH terms
Netrin Receptors, Humans, Phosphorylation, Receptors, Cell Surface, Tumor Cells, Cultured, Apoptosis, Calcium-Calmodulin-Dependent Protein Kinases, Apoptosis Regulatory Proteins, Protein Phosphatase 2, Death-Associated Protein Kinases

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