This gene encodes a high-affinity dickkopf homolog 1 (DKK1) transmembrane receptor that functionally cooperates with DKK1 to block wingless (WNT)/beta-catenin signaling. The encoded protein forms a ternary membrane complex with DKK1 and the WNT receptor lipoprotein receptor-related protein 6 (LRP6), and induces rapid endocytosis and removal of LRP6 from the plasma membrane. It contains extracellular kringle, WSC, and CUB domains. Alternatively spliced transcript variants encoding distinct isoforms have been observed for this gene. [provided by RefSeq, Jul 2008].
Function: Receptor for Dickkopf protein. Cooperates with Dickkopf to block Wnt/beta-catenin signaling. Forms a ternary complex with Dkk1 and LRP6 and induces rapid endocytosis and removal of the Wnt receptor LRP6 from the plasma membrane (By similarity).