DKK1 Proteins

Protein Information

DKK-1 is a member of the DKK protein family which also includes DKK-2, DKK-3 and DKK-4. DKK-1 was originally identified as a Xenopus head-forming molecule that behaves as an antagonist for Wnt signaling. Subsequent studies have shown that DKK-1 and DKK-4 play important regulatory roles in the Wnt/beta-catenin signaling pathway by forming inhibitory complexes with LDL receptor-related proteins 5 and 6 (LRP5 and LRP6), which are essential components of the Wnt/beta-catenin signaling system. LRP5 and LRP6 are single-pass transmembrane proteins that appear to act as co-receptors for Wnt ligands involved in the Wnt/beta-catenin signaling cascade. It has been suggested that by inhibiting Wnt/beta-catenin signaling, which is essential for posterior patterning in vertebrates, DKK-1 permits anterior development. This notion is supported by the finding that mice deficient of DKK-1 expression lack head formation and die during embryogenesis.

Synonyms

dickkopf 1 homolog; dickkopf homolog 1; dickkopf homolog 1 (Xenopus laevis); dickkopf related protein-1; dickkopf WNT signaling pathway inhibitor 1; Dickkopf1; dickkopf-1; dickkopf-1 like; dickkopf-like protein 1; dickkopf-related protein 1; DKK1; DKK-1; hDkk1; hDkk-1; mdkk-1; SK; UNQ492/PRO1008