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Proteolysis of the Hedgehog Signaling Effector Cubitus interruptus Requires Phosphorylation by Glycogen Synthase Kinase 3 and Casein Kinase 1
Open accessAbstract
The secreted signaling molecule Hedgehog regulates gene expression in target cells in part by preventing proteolysis of the full-length Cubitus interruptus (Ci-155) transcriptional activator to the Ci-75 repressor form. Ci-155 proteolysis depends on phosphorylation at three sites by Protein Kinase A (PKA). We show that these phosphoserines prime further phosphorylation at adjacent Glycogen Synthase Kinase 3 (GSK3) and Casein Kinase I (CK1) sites. Alteration of the GSK3 or CK1 sites prevents Ci-155 proteolysis and activates Ci in the absence of Hedgehog. Ci-155 proteolysis is also inhibited if cells lack activity of the Drosophila GSK3, Shaggy, previously implicated in Wingless signaling. Conversely, Ci-155 levels are reduced in Hedgehog-responding cells by overexpression of PKA and the Drosophila CK1, Double-time, a regulator of circadian rhythms.
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There is much cross-talk between the Hedgehog/Smoothened pathway and the Wnt pathway through GSK-3β and casein kinase I.
“there is much cross-talk with the Wnt pathway through GSK-3β and casein kinase I (115–118)”
From Functional genomic screen and network analysis reveal novel modifiers of tauopathy dissociated from tau phosphorylation (2011) · cites this paper as [117]
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Metadata
- Authors
- Price, M. A., & Kalderon, D.
- Affiliations
- Columbia University (US)
- Corresponding author
- Kalderon, Daniel
- ORCID
- Kalderon, Daniel
- Venue
- Cell
- Publisher
- Elsevier BV
- Published
- 2002-03
- Volume
- 108
- Issue
- 6
- Pages
- 823-835
- ISSN
- 0092-8674 (ISSN-L)
- OpenAlex
- W2168256871
- Cited by
- 381
- References
- 54
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 2 · 2023: 5 · 2022: 12 · 2021: 17 · 2020: 16 · 2019: 9 · 2018: 9 · 2017: 12 · 2016: 12 · 2015: 12 · 2014: 20 · 2013: 21 · 2012: 15
- FWCI
- 11.35
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Cell (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of General Medical Sciences (R01GM041815, GM-41815)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
- Keywords
- Hedgehog signaling, Cubitus interruptus, proteolysis, glycogen synthase kinase-3, casein kinase 1, Shaggy, double time, protein kinase A, phosphorylation, transcriptional activator, Drosophila, Wingless signaling, circadian rhythm
- MeSH terms
- Amino Acid Sequence, Animals, Binding Sites, DNA-Binding Proteins, Drosophila, Molecular Sequence Data, Mutation, Phosphorylation, Protein Kinases, Proto-Oncogene Proteins, Transcription Factors, Signal Transduction, Gene Expression Regulation, Enzymologic, Protein Serine-Threonine Kinases, Cyclic AMP-Dependent Protein Kinases, Calcium-Calmodulin-Dependent Protein Kinases, Drosophila Proteins, Zebrafish Proteins, Glycogen Synthase Kinases, Glycogen Synthase Kinase 3, Casein Kinases, Wnt Proteins, Hedgehog Proteins, In Vitro Techniques
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