Predicted to enable epidermal growth factor receptor binding activity and guanyl-nucleotide exchange factor activity. Predicted to be involved in several processes, including B cell receptor signaling pathway; positive regulation of B cell proliferation; and regulation of cell size. Predicted to act upstream of or within several processes, including integrin-mediated signaling pathway; neutrophil chemotaxis; and positive regulation of phosphatidylinositol 3-kinase activity. Predicted to be located in cytoplasm and immunological synapse. Orthologous to human VAV3 (vav guanine nucleotide exchange factor 3). [provided by Alliance of Genome Resources, Apr 2022]