CRISTIN1, hPWTSR, hRspo3, Protein with TSP type-1 repeat, PWTSR, R-spondin 3 homolog, R-spondin-3 [Precursor], R-spondin-3, Roof plate specific spondin-3, Roof plate-specific spondin-3, RSPO3_HUMAN, Thrombospondin type I domain containing 2, Thrombospondin type-1 domain-containing protein 2, THSD2.
Activator of the beta-catenin signaling cascade, leading to TCF-dependent gene activation. Acts both in the canonical Wnt/beta-catenin-dependent pathway, possibly via a direct interaction with Wnt proteins, and in a Wnt-independent beta catenin pathway through a receptor signaling pathway that may not use frizzled/LRP receptors. Acts as a ligand for frizzled FZD8 and LRP6. May negatively regulate the TGF-beta pathway.