2014
DOI: 10.1074/jbc.m114.590638
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Functional Analysis of Dishevelled-3 Phosphorylation Identifies Distinct Mechanisms Driven by Casein Kinase 1ϵ and Frizzled5

Abstract: Background: Phosphorylation of Dishevelled (Dvl) by casein kinase 1ϵ (CK1ϵ) is a key event in Wnt signal transduction.Results: Dvl3 residues phosphorylated by CK1ϵ were identified by proteomics and analyzed functionally.Conclusion: Individual phosphorylation events control different aspects of Dvl biology.Significance: CK1ϵ and Fzd5, a Wnt receptor, act on Dvl via distinct mechanism, suggesting that CK1ϵ is not directly downstream of Frizzled5.

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Cited by 58 publications
(77 citation statements)
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“…In 32D cells, heterologous expression of FZD 2 , FZD 4 , or FZD 5 resulted in the formation of PS-DVL even in the absence of exogenous WNT stimulation. These findings indicate that expression of FZD is sufficient to induce phosphorylation of endogenous DVLs, consistent with previous observations for FZD 5 (44). Finally, WNT-3A, -4, and -5A demonstrated functional activity in the 32D/FZD cell system as shown by ␤-catenin stabilization and phospho-LRP6 (WNT-3A) and PS-DVL2/3 (WNT-3A, -4, and -5A).…”
Section: Discussionsupporting
confidence: 77%
“…In 32D cells, heterologous expression of FZD 2 , FZD 4 , or FZD 5 resulted in the formation of PS-DVL even in the absence of exogenous WNT stimulation. These findings indicate that expression of FZD is sufficient to induce phosphorylation of endogenous DVLs, consistent with previous observations for FZD 5 (44). Finally, WNT-3A, -4, and -5A demonstrated functional activity in the 32D/FZD cell system as shown by ␤-catenin stabilization and phospho-LRP6 (WNT-3A) and PS-DVL2/3 (WNT-3A, -4, and -5A).…”
Section: Discussionsupporting
confidence: 77%
“…S3). Phosphorylation at S643 was associated with homogenous cytoplasmic localization of DVL3 (27), and indeed NEK2, similar to casein kinase (CK)1e coexpression (28,29), triggered subcellular relocalization of DVL from punctate to even cytoplasmic distribution (SI Appendix, Fig. S2D).…”
Section: Resultsmentioning
confidence: 99%
“…The efforts to explain DVL's individual "fates" by single-point mutations were not, so far, successful. For example, NEK2 resembles in many aspects the best-described DVL kinase CK1e: both kinases are capable of inducing a dramatic DVL phosphorylation shift, overlap in many target residues (e.g., S643 and S280 in hDVL3) (27), and are capable of promoting even cytoplasmic localization of DVL, but only CK1e can induce downstream Wnt/β-catenin signaling. It is likely that only identification and functional characterization of complex phosphorylation barcodes of individual DVL subcellular pools will fully reconcile the issue.…”
Section: Discussionmentioning
confidence: 99%
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