Predicted to enable GTPase activity; guanyl ribonucleotide binding activity; and transcription coactivator activity. Predicted to be involved in several processes, including Rap protein signal transduction; establishment of endothelial intestinal barrier; and regulation of protein tyrosine kinase activity. Predicted to act upstream of or within positive regulation of protein autophosphorylation. Predicted to be located in several cellular components, including bicellular tight junction; cell-cell contact zone; and recycling endosome membrane. Predicted to be active in plasma membrane. Orthologous to human RAP2C (RAP2C, member of RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]