| USPs | ubiquitin-specific proteases |
| OTU | ovarian tumor proteases |
| MJDs | Machado–Josephin domain proteases |
| MINDYs | (motif interacting with Ub-containing novel DUB family) |
| ZUFDP | Zn-finger and UFSP domain protein |
| UCHs | ubiquitin C-terminal hydrolases |
| JAMM | Jab1/Mov34/Mpr1 Pad1 N-terminal+ (MPN+) |
| SCA3 | Spinocerebellar ataxia type 3 |