| Domain | Name | Category | Type | 
		| IPR000594 | THIF-type NAD/FAD binding fold | Domain | Domain | 
		| IPR014929 | E2 binding | Domain | Domain | 
		| IPR023318 | Ubiquitin activating enzyme, alpha domain superfamily | Family | Homologous superfamily | 
		| IPR030468 | NEDD8-activating enzyme E1 catalytic subunit | Family | Family | 
		| IPR033127 | Ubiquitin-activating enzyme E1, Cys active site | Site | Active site | 
		| IPR035985 | Ubiquitin-activating enzyme | Family | Homologous superfamily |