| Domain | Name | Category | Type |
| IPR004303 | Protein-arginine deiminase | Family | Family |
| IPR008972 | Cupredoxin | Family | Homologous superfamily |
| IPR013530 | Protein-arginine deiminase, C-terminal | Domain | Domain |
| IPR013732 | Protein-arginine deiminase (PAD), N-terminal | Domain | Domain |
| IPR013733 | Protein-arginine deiminase (PAD), central domain | Domain | Domain |
| IPR036556 | Protein-arginine deiminase, central domain superfamily | Family | Homologous superfamily |
| IPR038685 | PAD, N-terminal domain superfamily | Family | Homologous superfamily |