The RIC1-RGP1 complex acts as a guanine nucleotide exchange factor (GEF), which activates YPT6 by exchanging bound GDP for free GTP. It is thereby required for efficient fusion of endosome-derived vesicles with the Golgi. The RIC1-RGP1 participates in the recycling of SNC1, presumably by mediating fusion of endosomal vesicles with the Golgi compartment. Required for proper mitotic growth. Forms a complex with RIC1. Present with 589 molecules/cell in log phase SD medium. Belongs to the RGP1 family.