Enables eukaryotic initiation factor 4E binding activity. Involved in lung development and response to ethanol. Part of eukaryotic translation initiation factor 4F complex. Is active in postsynapse. Human ortholog(s) of this gene implicated in late onset Parkinson's disease. Orthologous to human EIF4G1 (eukaryotic translation initiation factor 4 gamma 1). [provided by Alliance of Genome Resources, Apr 2022]