May be 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 (By similarity). Can form homodimers and heterodimers with DACT1 or DACT3. Interacts with CSNK1D, PKA catalytic subunit, PKC-type kinase, DVL1, DVL2, DVL3, VANGL1, VANGL2 and CTNND1. Expressed in brain and uterus. Expression peaks at 10.5 dpc, then declines. Expressed in the ventral region of maturing somites, limb bud and branchial arch mesenchyme, and in the developing central nervous system. The C-terminal PDZ-binding motif may mediate interaction with the PDZ domains of DSH (Dishevelled) family proteins. Belongs to the dapper family.