Receptor for Wnt proteins (PubMed:19855022, PubMed:20711352). Most frizzled receptors are coupled to the beta-catenin canonical signaling pathway, which 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 (Probable). Required for the migration and axon formation and guidance of different neuronal cell types including canal-associated neurons (CAN), hermaphrodite-specific neurons (HSN), anterior lateral microtubule neurons (ALM), and the right Q neuroblast (QR) and its descendants (PubMed:16109397). Directs ALM migration through frizzled protein mom-5 and Wnt ligands cwn-1, cwn-2 and egl-20 (PubMed:16109397). May act redundantly with mom-5 to direct CAN migration (PubMed:16109397). Plays a role in the organization of head ganglion cells (PubMed:16109397). Probably by acting as a receptor for Wnt ligand cwn-2, plays a role in the positioning of the nerve ring and may in addition positively regulate the neurite outgrowth of RME GABAergic motor neurons along the anterior-posterior axis of the body (PubMed:19855022, PubMed:20711352). Expressed in two pairs of head neurons and throughout the pharynx. First expressed at the 100-cell stage of embryogenesis. During embryonic elongation, expressed in anterior, posterior and midbody cells of the embryo and in cellular projections. At hatching, expression is restricted to a few cells in the head and a pair of cells in the tail. Lys-Thr-X-X-X-Trp motif interacts with the PDZ domain of Dvl (Disheveled) family members and is involved in the activation of the Wnt/beta-catenin signaling pathway. The FZ domain is involved in binding with Wnt ligands. Displaced anterior nerve ring and neuronal cell migration defects including irregular localization of canal-associated neurons (CAN), hermaphrodite-specific neurons (HSN), anterior lateral microtubule neurons (ALM), and the right (but not the left) Q neuroblast (QR) and its descendants (PubMed:16109397, PubMed:9851916). Axon growth and guidance defects whereby some HSN, male CP neurons and CAN extend ectopic axons or branches, and furthermore some HSN irregularly route towards the ventral midline of the body (PubMed:16109397). Disorganized cells of the anterior ganglion which are normally compacted together when they form the head ganglion in wild-type animals (PubMed:16109397). Double knockout with mom-5 or cwn-2 results in enhanced CAN migration defects (PubMed:16109397). Double knockout with Wnt ligands cwn-1, cwn-2, egl-20 or frizzled protein mom-5 rescues the ALM migration defects in the single cfz-2 knockout (PubMed:16109397). Triple knockout with cwn-1 and cwn-2 results in enhanced neuronal cell migratory defects (PubMed:16109397). Belongs to the G-protein coupled receptor Fz/Smo family.