Anti-Human UBR5 Polyclonal Antibody

E3 ubiquitin-protein ligase UBR5 is a ~309 kDa protein. E3 ubiquitin-protein ligase involved in different protein quality control pathways in the cytoplasm and nucleus. Mainly acts as a ubiquitin chain elongator that extends pre-ubiquitinated substrates. Component of the N-end rule pathway: ubiquitinates proteins bearing specific N-terminal residues that are destabilizing according to the N-end rule, leading to their degradation. Recognizes type-1 N-degrons, containing positively charged amino acids (Arg, Lys and His). Together with UBR4, part of a cytoplasm protein quality control pathway that prevents protein aggregation by catalyzing assembly of heterotypic 'Lys-11'-/'Lys-48'-linked branched ubiquitin chains on aggregated proteins, leading to substrate recognition by the segregase p97/VCP and degradation by the proteasome: UBR5 is probably branching multiple 'Lys-48'-linked chains of substrates initially modified with mixed conjugates by UBR4.