| ThrRS | threonyl-tRNA synthetase |
| BaThrRS | Brucella abortus threonyl-tRNA synthetase |
| PDB | Protein Data Bank |
| ATP | adenosine triphosphate |
| tRNA | transfer RNA |
| aaRS | aminoacyl-tRNA synthetase |
| EThrRS | Escherichia coli threonyl-tRNA synthetase |
| NPD | Natural Products Database |