Precisely tailored pharmaceuticals could reduce medical side effects
LOS ALAMOS, N.M.,
Oct. 9, 2012 /PRNewswire-USNewswire/ -- Researchers at Los Alamos National Laboratory have used neutron crystallography for the first time to determine the structure of a clinical drug in complex with its human target enzyme. Seeing the detailed structure of the bonded components provides insights into developing more effective drugs with fewer side effects for patients.
The atomic details of drug binding have been largely unknown due to the lack of key information on specific hydrogen atom positions and hydrogen bonding between the drug and its target enzyme. In this research, scientists used the drug acetazolamide (AZM) -- a sulfonamide drug that has been used for decades to treat a variety of diseases such as glaucoma, altitude sickness, and epilepsy. But when the drug binds with the wrong form (called an isoform) of the target enzyme for the disease, it can produce unpleasant side effects in patients (so called "off-target" drug binding).
Enter neutron crystallography – the use of neutron scattering to paint a picture of these bonds.
By providing precise information on hydrogen bonding between target enzymes and the treatment drugs (carbon anhydrase II targeted by AZM in this study), the research enables improvements in targeted binding with fewer side effects. Neutron crystallography offers a new and unique insight into these details, providing imagery of the exact structures involved.
Scientists from Los Alamos National Laboratory collected the data at the Protein Crystallography Station using neutrons from the accelerator at the Los Alamos Neutron Science Center,
. The Journal of the American Chemical Society published the research, "Neutron Diffraction of Acetazolamide-Bound Human Carbonic Anhydrase II Reveals Atomic Details of Drug Binding" available online at
Mary Jo Waltman
of the Los Alamos Bioenergy and Environmental Science group,
and currently at Oak Ridge National Laboratory, and
University of Florida
The U.S. Department of Energy Office of Science funds the Protein Crystallography Station at LANSCE.
received partial support through a Laboratory Directed Research and Development (LDRD) Early Career Award.
About Los Alamos National Laboratory (
Los Alamos National Laboratory, a multidisciplinary research institution engaged in strategic science on behalf of national security, is operated by Los Alamos National Security, LLC, a team composed of Bechtel National, the University of
, The Babcock & Wilcox Company and URS Corporation for the Department of Energy's National Nuclear Security Administration.
enhances national security by ensuring the safety and reliability of the U.S. nuclear stockpile, developing technologies to reduce threats from weapons of mass destruction, and solving problems related to energy, environment, infrastructure, health and global security concerns.