Enables guanyl-nucleotide exchange factor activity. Involved in chemotaxis and positive regulation of Ras protein signal transduction. Located in cytoplasm and intracellular membrane-bounded organelle. Expressed in excretory gland cell; nervous system; pharyngeal gland cell; rectal gland cell; and
uv1. Human ortholog(s) of this gene implicated in hypertension; immunodeficiency 64; and platelet-type bleeding disorder 18. Is an ortholog of human RASGRP1 (RAS guanyl releasing protein 1); RASGRP2 (RAS guanyl releasing protein 2); and RASGRP3 (RAS guanyl releasing protein 3).