Cited by 174Hedgehog Signaling Pathway StudiesGenetic and Kidney Cyst DiseasesWnt/β-catenin signaling in development and cancer

A Smoothened-Evc2 Complex Transduces the Hedgehog Signal at Primary Cilia

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Dorn, Karolin V., Hughes, Casey E., Rohatgi, Rajat·2012·Developmental Cell

Abstract

Vertebrate Hedgehog (Hh) signaling is initiated at primary cilia by the ligand-triggered accumulation of Smoothened (Smo) in the ciliary membrane. The underlying biochemical mechanisms remain unknown. We find that Hh agonists promote the association between Smo and Evc2, a ciliary protein that is defective in two human ciliopathies. The formation of the Smo-Evc2 complex is under strict spatial control, being restricted to a distinct ciliary compartment, the EvC zone. Mutant Evc2 proteins that localize in cilia but are displaced from the EvC zone are dominant inhibitors of Hh signaling. Disabling Evc2 function blocks Hh signaling at a specific step between Smo and the downstream regulators protein kinase A and Suppressor of Fused, preventing activation of the Gli transcription factors. Our data suggest that the Smo-Evc2 signaling complex at the EvC zone is required for Hh signal transmission and elucidate the molecular basis of two human ciliopathies.

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Crossref · 10.1016/j.devcel.2012.07.004

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  • The intermediate steps between SMO activation, GLIA formation and translocation to the nucleus are not well understood, although GLI2 and GLI3 proteins accumulate in cilia tips upon HH pathway activation, suggesting that GLIA formation is regulated near cilia.

    “The intermediate steps between SMO activation, GLIA formation and translocation to the nucleus are not well understood, although GLI2 and GLI3 proteins accumulate in cilia tips upon HH pathway activation, suggesting that GLIA formation is regulated in the vicinity of cilia 117.”

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Authors
Dorn, K. V., Hughes, C. E., & Rohatgi, R.
Affiliations
Stanford Medicine (US)
Corresponding author
Rohatgi, Rajat
Venue
Developmental Cell
Publisher
Elsevier BV
Published
2012-10
Volume
23
Issue
4
Pages
823-835
ISSN
1534-5807 (ISSN-L)
OpenAlex
W2063299495
Cited by
174
References
38
Citations by year
2026: 6 · 2025: 12 · 2024: 6 · 2023: 6 · 2022: 10 · 2021: 9 · 2020: 18 · 2019: 8 · 2018: 12 · 2017: 18 · 2016: 18 · 2015: 17 · 2014: 23 · 2013: 9 · 2012: 2
FWCI
6.55
Type
journal article
Language
en
Open access
Locations
  • Developmental Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (CA129174)
  • March of Dimes Foundation
  • Sontag Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
Keywords
Hedgehog signaling, primary cilia, Smoothened, EVC2, ciliopathies, protein kinase A, SUFU, Gli transcription factors, signal transduction, dominant negative inhibition
MeSH terms
Animals, Cell Line, Cilia, Membrane Proteins, Signal Transduction, Intercellular Signaling Peptides and Proteins, NIH 3T3 Cells, Mice, Hedgehog Proteins

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