| Domain | Name | Category | Type |
| IPR002314 | Aminoacyl-tRNA synthetase, class II (G/ P/ S/T) | Domain | Domain |
| IPR002320 | Threonine-tRNA ligase, class IIa | Family | Family |
| IPR004095 | TGS | Domain | Domain |
| IPR004154 | Anticodon-binding | Domain | Domain |
| IPR006195 | Aminoacyl-tRNA synthetase, class II | Domain | Domain |
| IPR012675 | Beta-grasp domain superfamily | Family | Homologous superfamily |
| IPR012676 | TGS-like | Family | Homologous superfamily |
| IPR012947 | Threonyl/alanyl tRNA synthetase, SAD | Domain | Domain |
| IPR018163 | Threonyl/alanyl tRNA synthetase, class II-like, putative editing domain superfamily | Family | Homologous superfamily |
| IPR033728 | Threonine-tRNA ligase catalytic core domain | Domain | Domain |
| IPR036621 | Anticodon-binding domain superfamily | Family | Homologous superfamily |