The Catalytic Mechanism of an Aspartic Proteinase Explored with Neutron and X-Ray Diffraction
Coates, L., Tuan, H.-F., Tomanicek, S., Kovalevsky, A., Mustyakimov, M., Erskine, P., Cooper, J.(2008) J Am Chem Soc 130: 7235
- PubMed: 18479128 
- DOI: 10.1021/ja801269x
- Primary Citation of Related Structures:  
2JJI, 2JJJ, 2VS2 - PubMed Abstract: 
Hydrogen atoms play key roles in enzyme mechanism, but as this study shows, even high-quality X-ray data to a resolution of 1 A cannot directly visualize them. Neutron diffraction, however, can locate deuterium atoms even at resolutions around 2 A. Both neutron and X-ray diffraction data have been used to investigate the transition state of the aspartic proteinase endothiapepsin ...