| Domain | Name | Category | Type |
| IPR002133 | S-adenosylmethionine synthetase | Family | Family |
| IPR022628 | S-adenosylmethionine synthetase, N-terminal | Domain | Domain |
| IPR022629 | S-adenosylmethionine synthetase, central domain | Domain | Domain |
| IPR022630 | S-adenosylmethionine synthetase, C-terminal | Domain | Domain |
| IPR022631 | S-adenosylmethionine synthetase, conserved site | Site | Conserved site |
| IPR022636 | S-adenosylmethionine synthetase superfamily | Family | Homologous superfamily |