Predicted to enable protein serine/threonine kinase activator activity. Acts upstream of or within positive regulation of actin filament polymerization; positive regulation of peptidyl-tyrosine phosphorylation; and regulation of GTPase activity. Part of TORC1 complex. Is expressed in central nervous system and retina. Orthologous to human MLST8 (MTOR associated protein, LST8 homolog). [provided by Alliance of Genome Resources, Apr 2022]