Predicted to enable kinase activator activity. Predicted to contribute to guanyl-nucleotide exchange factor activity and molecular adaptor activity. Predicted to be involved in cellular protein localization; cellular response to amino acid stimulus; and positive regulation of TOR signaling. Predicted to act upstream of or within positive regulation of MAPK cascade and protein localization to cell junction. Predicted to be located in late endosome. Predicted to be part of Ragulator complex. Orthologous to human LAMTOR3 (late endosomal/lysosomal adaptor, MAPK and MTOR activator 3). [provided by Alliance of Genome Resources, Apr 2022]