Predicted to enable GTPase activity; guanyl ribonucleotide binding activity; and transcription coactivator activity. Involved in Rap protein signal transduction and regulation of protein tyrosine kinase activity. Acts upstream of or within negative regulation of cell migration and positive regulation of protein autophosphorylation. Located in cytosol and recycling endosome membrane. Is expressed in 1st branchial arch mandibular component. Orthologous to human RAP2C (RAP2C, member of RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]