Negatively regulates MHC class II antigen presentation in dendritic cells by interacting with the molecular chaperone HSPA8 and impairing its role in lysosomal antigen transport . Does not regulate the levels or activity of the MIR155HG microRNA from which miPEP155 is derived .
Subcellular locations: Cytoplasm, Nucleus
Detected in dendritic cells (at protein level).