Predicted to enable acetyltransferase activator activity. Part of NatA complex. Is expressed in adult head. Used to study developmental disorder of mental health. Human ortholog(s) of this gene implicated in autosomal dominant intellectual developmental disorder 50. Orthologous to human NAA15 (N-alpha-acetyltransferase 15, NatA auxiliary subunit) and NAA16 (N-alpha-acetyltransferase 16, NatA auxiliary subunit).