Ubiquitin D (UBD)

Ubiquitin-like protein modifier that may be covalently attached to target protein and then leads to their degradation by the 26S proteasome, in a NUB1-dependent method. Probably functions as a survival factor.

Conjugation capacity triggered by UBA6. Promotes the expression of the proteasome subunit beta type-9 (PSMB9/LMP2).