E3 ubiquitin-protein ligase UBR2 (UBR2)

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

Plays a critical role in chromatin inactivation and chromosome-wide transcriptional silencing during meiosis through ubiquitination of histone H2A. Binds leucine and is a negative regulator of the leucine-mTOR signaling pathway, thereby controlling cell growth.