Enables actin binding activity and ribosome binding activity. Involved in several processes, including GCN2-mediated signaling; cellular response to starvation; and negative regulation of nitrogen compound metabolic process. Acts upstream of or within negative regulation of protein phosphorylation and regulation of translational initiation. Part of polysome. Is expressed in several structures, including brain; extraembryonic component; genitourinary system; gut; and hemolymphoid system gland. Orthologous to human IMPACT (impact RWD domain protein). [provided by Alliance of Genome Resources, Apr 2022]