Abstract

Wnt palmitoylation regulates its secretion and signaling activity in cells. Methods to monitor cellular Wnt palmitoylation are instrumental in investigating Wnt activity, secretion, and its interaction with cellular membrane compartments. This protocol describes a method we have recently developed to detect cellular Wnt palmitoylation. The method, combining click chemistry, bio-orthogonal fatty acid probes, and proximity ligation assay (PLA), provides high sensitivity and subcellular resolution for detection of Wnt palmitoylation. It is also compatible with multiple imaging platforms, and is applicable to detecting palmitoylated forms of other fatty acylated proteins.

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