Crystal structures of mammalian glutamine synthetases illustrate substrate-induced conformational changes and provide opportunities for drug and herbicide design.
Krajewski, W.W., Collins, R., Holmberg-Schiavone, L., Jones, T.A., Karlberg, T., Mowbray, S.L.(2008) J Mol Biol 375: 217-228
- PubMed: 18005987 
- DOI: 10.1016/j.jmb.2007.10.029
- Primary Citation of Related Structures:  
2OJW, 2QC8, 2UU7 - PubMed Abstract: 
Glutamine synthetase (GS) catalyzes the ligation of glutamate and ammonia to form glutamine, with concomitant hydrolysis of ATP. In mammals, the activity eliminates cytotoxic ammonia, at the same time converting neurotoxic glutamate to harmless glutamine; there are a number of links between changes in GS activity and neurodegenerative disorders, such as Alzheimer's disease ...