CHMP4B: Proteins and Enzymes

Component of the escrt-iii complex, which is required for multivesicular bodies (mvbs) formation and sorting of endosomal cargo proteins into mvbs. the mvb pathway mediates delivery of transmembrane proteins into the lumen of the lysosome for degradation. the escrt-iii complex is probably involved in the concentration of mvb cargo. in the escrt-iii complex, it probably serves as an acceptor for escrt-i complex on endosomal membranes. in case of infection, the hiv-1 virus takes advantage of the escrt-iii complex for budding and exocytic cargos of viral proteins, via the association of chmp4 proteins with pdcd6ip/aip1, a protein directly recruited by hiv-1 p6 protein that functions at sites of viral gag assembly and budding.