UBE2J1

The protein encoded by UBE2J1 is Ubiquitin-conjugating enzyme E2 J1, often referred to as UBCJ1. As a key member of the E2 ubiquitin-conjugating enzyme family, it catalyzes ubiquitin transfer to substrate proteins, playing a pivotal role in endoplasmic reticulum-associated degradation (ERAD). This pathway maintains cellular protein homeostasis by eliminating misfolded or unfolded proteins in the ER, preventing their toxic accumulation.
Aberrant UBE2J1 function is linked to neurodegenerative disorders like Alzheimer’s disease—impaired ERAD here leads to amyloid-β aggregation. In cancers, its overexpression may promote tumor progression by degrading tumor suppressors. While ERAD-targeted therapies are being explored, specific UBE2J1 inhibitors remain in early preclinical research stages, with no approved drugs to date.