Contributes to translation initiation factor activity. Involved in translational initiation. Part of eukaryotic translation initiation factor 3 complex, eIF3m. Is active in synapse. Is expressed in several structures, including central nervous system; extraembryonic component; and sensory organ. Orthologous to human EIF3B (eukaryotic translation initiation factor 3 subunit B). [provided by Alliance of Genome Resources, Apr 2022]