E3 ubiquitin-protein ligase UBR4 (UBR4)

E3 ubiquitin-protein ligase which is a part of the N-end rule pathway. Recognizes and binds to proteins bearing specific N-terminal residues that are destabilizing in line with the N-end rule, resulting in their ubiquitination and subsequent degradation.

Together with clathrin, forms meshwork structures involved in membrane morphogenesis and cytoskeletal organization. Regulates integrin-mediated signaling.