| Domain | Name | Category | Type |
| IPR008146 | Glutamine synthetase, catalytic domain | Domain | Domain |
| IPR008147 | Glutamine synthetase, beta-Grasp domain | Domain | Domain |
| IPR014746 | Glutamine synthetase/guanido kinase, catalytic domain | Family | Homologous superfamily |
| IPR027302 | Glutamine synthetase, N-terminal conserved site | Site | Conserved site |
| IPR027303 | Glutamine synthetase, glycine-rich site | Site | Conserved site |
| IPR036651 | Glutamine synthetase, N-terminal domain superfamily | Family | Homologous superfamily |