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Updated: May 24, 2026

In vitro Methylation Assay to Study Protein Arginine Methylation
Published on: October 5, 2014
Wnt3a-stimulated LRP6 phosphorylation is dependent upon arginine methylation of G3BP2
Rama Kamesh Bikkavilli1, Craig C Malbon
1Department of Pharmacology, School of Medicine, Health Sciences Center, State University of New York at Stony Brook, Stony Brook, NY 11794-8651, USA. kamesh.bikkavilli@ucdenver.edu
Abstract:
Wnt signaling is initiated upon binding of Wnt proteins to Frizzled proteins and their co-receptors LRP5 and 6. The signal is then propagated to several downstream effectors, mediated by the phosphoprotein scaffold, dishevelled. We report a novel role for arginine methylation in regulating Wnt3a-stimulated LRP6 phosphorylation. G3BP2, a dishevelled-associated protein, is methylated in response to Wnt3a. The Wnt3a-induced LRP6 phosphorylation is attenuated by G3BP2 knockdown, chemical inhibition of methyl transferase activity or expression of methylation-deficient mutants of G3BP2. Arginine methylation of G3BP2 appears to be a Wnt3a-sensitive 'switch' regulating LRP6 phosphorylation and canonical Wnt-β-catenin signaling.
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