Involved in regulation of intracellular signaling pathways during development. Specifically thought to play a role in canonical and/or non-canonical Wnt signaling pathways through interaction with DSH (Dishevelled) family proteins. Binds to dvl2 and regulates the degradation of ctnnb1/beta-catenin, thereby modulating the transcriptional activation of target genes of the Wnt signaling pathway. May also bind to and directly stimulate the activity of tcf7l1 (By similarity). Interacts with dbf4, dvl2 and tcf7l1. The C-terminal PDZ-binding motif may mediate interaction with the PDZ domains of DSH (Dishevelled) family proteins. Belongs to the dapper family.