Frizzied Homolog 8 (FZD8) ELISA Kit for Human

This intronless gene is a member of the frizzled gene family. Members of this family encode seven-transmembrane domain proteins that are receptors for the Wingless type MMTV integration site family of signaling proteins. Most frizzled receptors are coupled to the beta-catenin canonical signaling pathway. This gene is highly expressed in two human cancer cell lines, indicating that it may play a role in several types of cancer. The crystal structure of the extracellular cysteine-rich domain of a similar mouse protein has been determined. [provided by RefSeq, Jul 2008]

FZD8: Receptor for Wnt proteins. Component of the Wnt-Fzd- LRP5-LRP6 complex that triggers beta-catenin signaling through inducing aggregation of receptor-ligand complexes into ribosome- sized signalosomes. The beta-catenin canonical signaling pathway leads to the activation of disheveled proteins, inhibition of GSK- 3 kinase, nuclear accumulation of beta-catenin and activation of Wnt target genes. A second signaling pathway involving PKC and calcium fluxes has been seen for some family members, but it is not yet clear if it represents a distinct pathway or if it can be integrated in the canonical pathway, as PKC seems to be required for Wnt-mediated inactivation of GSK-3 kinase. Both pathways seem to involve interactions with G-proteins. May be involved in transduction and intercellular transmission of polarity information during tissue morphogenesis and/or in differentiated tissues. Coreceptor along with RYK of Wnt proteins, such as WNT1. Belongs to the G-protein coupled receptor Fz/Smo family.

Protein type: GPCR, Fz/Smo family; Receptor, GPCR; Membrane protein, integral; Membrane protein, multi-pass

Chromosomal Location of Human Ortholog: 10p11.21

Cellular Component: Golgi apparatus; integral to membrane; plasma membrane

Molecular Function: G-protein coupled receptor activity; Wnt-protein binding; protein binding; Wnt receptor activity; ubiquitin protein ligase binding; receptor binding; PDZ domain binding

Biological Process: neuron differentiation; G-protein coupled receptor protein signaling pathway; positive regulation of JNK activity; T cell differentiation in the thymus; positive regulation of transcription from RNA polymerase II promoter; angiogenesis; Wnt receptor signaling pathway through beta-catenin; negative regulation of transcription from RNA polymerase II promoter