Predicted to enable guanyl-nucleotide exchange factor activity. Acts upstream of or within long-term synaptic potentiation and regulation of NMDA receptor activity. Predicted to be located in endoplasmic reticulum. Is expressed in brain; hypothalamus mantle layer; medulla oblongata basal plate mantle layer; and pons mantle layer. Orthologous to human RASGRF2 (Ras protein specific guanine nucleotide releasing factor 2). [provided by Alliance of Genome Resources, Apr 2022]