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Serves as a substrate-specific adapter for the CUL3-based ubiquitin-protein E3 ligase complex. Negatively regulates the Wnt signaling pathway via the targeted ubiquitination and subsequent proteolysis of DVL3. Component of an ubiquitin-protein E3 ligase complex which includes at least CUL3 and KLHL12. This complex interacts with DVL3 upon activation of the Wnt signaling pathway by WNT3A.
