Compositions for and methods of stimulating a MHC I mediated immune response comprising stimulating MHC I endolysosomal cross presentation in dendritic cells. Stimulation MHC I endolysosomal cross presentation may comprise over-expression CD74 in dendritic cells and/or targeting antigens to the MHC I endolysosomal cross presentation pathway. Fusion proteins comprising an antigen or fragment thereof and a CD74 endolysosomal targeting sequence are also provided.
