E3 ubiquitin-protein ligase UBR3 (Ubr3)

E3 ubiquitin-protein ligase that is a part of the N-end rule pathway (PubMed:17462990). Doesn't bind to proteins pose particular N-terminal residues that are destabilizing in line with the N-end rule, leading to their ubiquitination and subsequent degradation (PubMed:17462990).

May play a role in Shh signaling by mediating the ubiquitination of Kif7 (PubMed:27195754). May be important for MYH9 function in certain tissues, possibly by regulating the ubiquitination of MYH9 and consequently affecting its interaction with MYO7A (PubMed:27331610).