Predicted to contribute to GTPase activator activity. Predicted to be involved in several processes, including TORC1 signaling; cellular response to amino acid starvation; and negative regulation of TOR signaling. Predicted to act upstream of or within circulatory system development and roof of mouth development. Predicted to be located in lysosomal membrane. Predicted to be part of GATOR1 complex. Human ortholog(s) of this gene implicated in focal epilepsy. Orthologous to human NPRL3 (NPR3 like, GATOR1 complex subunit). [provided by Alliance of Genome Resources, Apr 2022]