Representation of important ubiquitination core enzyme families in the human genome
| Protein family . | Structural domains . | No. of Refseq IDs . | No. of HGNC proteins* . |
|---|---|---|---|
| E1-activating enzymes | Ubiquitin-activating domain40 | 9 | 4 |
| E2-conjugating enzymes | UBC core domain41 | 78 | 43 |
| E3 ligases | RING42 | 562 | 334 |
| TRIAD43 | 33 | 22 | |
| HECT44 | 45 | 28 | |
| PHD45 | 290 | 173 | |
| U box46 | 42 | 31 | |
| E3 complex formation | SOCS box47 | 54 | 39 |
| Substrate recruitment | F-box48 | 115 | 72 |
| BTB49 | 273 | 188 | |
| Proteasome complex | 85 | 68 | |
| DUB | UCH, USP, OUT, Josephin, JAMM50 | 98 | 86 |
| Protein family . | Structural domains . | No. of Refseq IDs . | No. of HGNC proteins* . |
|---|---|---|---|
| E1-activating enzymes | Ubiquitin-activating domain40 | 9 | 4 |
| E2-conjugating enzymes | UBC core domain41 | 78 | 43 |
| E3 ligases | RING42 | 562 | 334 |
| TRIAD43 | 33 | 22 | |
| HECT44 | 45 | 28 | |
| PHD45 | 290 | 173 | |
| U box46 | 42 | 31 | |
| E3 complex formation | SOCS box47 | 54 | 39 |
| Substrate recruitment | F-box48 | 115 | 72 |
| BTB49 | 273 | 188 | |
| Proteasome complex | 85 | 68 | |
| DUB | UCH, USP, OUT, Josephin, JAMM50 | 98 | 86 |
DUB indicates deubiquitinating enzyme.
Number of proteins based on protein nomenclature by the HGNC:HUGO Gene Nomenclature Committee.