Predicted to enable guanyl-nucleotide exchange factor activity. Involved in regulation of postsynaptic specialization assembly. Located in GABA-ergic synapse and postsynaptic density. Is expressed in several structures, including central nervous system; dorsal root ganglion; and ear. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 8. Orthologous to human ARHGEF9 (Cdc42 guanine nucleotide exchange factor 9). [provided by Alliance of Genome Resources, Apr 2022]