The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.
Evidence for the direct involvement of βTrCP in Gli3 protein processing
Open accessAbstract
Hedgehog-regulated processing of the transcription factor cubitus interruptus (Ci) in Drosophila depends on phosphorylation of the C-terminal region of Ci by cAMP-dependent protein kinase and subsequently by casein kinase 1 and glycogen synthase kinase 3. Ci processing also requires Slimb, an F-box protein of SCF ( S kp1/ C ullin/ F -box proteins) complex, and the proteasome, but the interplay between phosphorylation and the activity of Slimb and the proteasome remains unclear. Here we show that processing of the Gli3 protein, a homolog of Ci, also depends on phosphorylation of a set of four cAMP-dependent protein kinase sites that primes subsequent phosphorylation of adjacent casein kinase 1 and glycogen synthase kinase 3. Our gain- and loss-of-function analyses in cultured cells further reveal that βTrCP, the vertebrate homolog of Slimb, is required for Gli3 processing, and we demonstrate that βTrCP can bind phosphorylated Gli3 both in vitro and in vivo . We also find that the Gli3 protein is polyubiquitinated in the cell and that its processing depends on proteasome activity. Our findings provide evidence for a direct link between phosphorylation of Gli3/Ci proteins and βTrCP/Slimb action, thus supporting the hypothesis that the processing of Gli3/Ci is affected by the proteasome.
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Cited by
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Wnt/β-catenin signaling in cancers and targeted therapies
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Metadata
- Authors
- Wang, B., & Li, Y.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2005-12-21
- Volume
- 103
- Issue
- 1
- Pages
- 33-38
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2027728353
- Cited by
- 273
- References
- 37
- FWCI
- 3.69
- Type
- journal article
- Language
- en
- Open access
- green
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