Is an ortholog of human KALRN (kalirin RhoGEF kinase) and TRIO (trio Rho guanine nucleotide exchange factor). Exhibits Rac guanyl-nucleotide exchange factor activity. Is involved in several processes, including engulfment of apoptotic cell\; generation of neurons\; and modulation of chemical synaptic transmission. Localizes to the axon\; cytoplasm\; and muscle cell projection. Is expressed in several tissues, including the epithelial system\; the nervous system\; the reproductive system\; the ventral cord blast cell\; and in the male. Is used to study epilepsy.