Catalytic Site Conformations in Human PNP by (19)F-NMR and Crystallography.
Suarez, J., Haapalainen, A.M., Cahill, S.M., Ho, M.C., Yan, F., Almo, S.C., Schramm, V.L.(2013) Chem Biol 20: 212-222
- PubMed: 23438750 
- DOI: 10.1016/j.chembiol.2013.01.009
- Primary Citation of Related Structures:  
4EAR, 4EB8, 4ECE, 4GKA - PubMed Abstract: 
Purine nucleoside phosphorylase (PNP) is a target for leukemia, gout, and autoimmune disorders. Dynamic motion of catalytic site loops has been implicated in catalysis, but experimental evidence was lacking. We replaced catalytic site groups His257 or His64 with 6-fluoro-tryptophan (6FW) as site-specific NMR probes ...