The MJD (Machado-Josephin Domain protease) family is a family of deubiquitinating enzymes characterized by the presence of a Josephin domain, which is a conserved catalytic domain. MJD enzymes are cysteine proteases.
| Synonym | Reference | Specificity |
| josephin deubiquinatase | Exact | |
| josephin deubiquinatases | Exact | |
| josephin deubiquitinatase | Exact | |
| josephin deubiquitinatases | Exact | |
| josephin deubiquitylase | Exact | |
| josephin deubiquitylases | Exact | |
| josephin domain containing | Exact | |
| MJD deubiquinating enzyme | Exact | |
| MJD deubiquinating enzymes | Exact | |
| MJD deubiquitinating enzyme | Exact |
| Identifier | Name | Relation |
| HGNC:24173 | ATXN3L | isa |
| HGNC:28853 | JOSD2 | isa |
| HGNC:28953 | JOSD1 | isa |
| HGNC:7106 | ATXN3 | isa |
| Relation | Identifier | Name |
| isa | FPLX:Deubiquitinase | Deubiquitinase |