Plays a role in ribosome biogenesis and in nuclear import of the 60S ribosomal protein L5/large ribosomal subunit protein uL18 (RPL5) (PubMed:35213692). Required for proper erythrocyte maturation (PubMed:35213692). . This is the function of HEATR3 (HEAT repeat containing 3, ENSG00000155393).