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Georgia Tech develops speedy software designed to improve drug development
Date:11/17/2011

Creating new, improved pharmaceuticals is sometimes very similar to cracking the code of a combination lock. If you have the wrong numbers, the lock won't open. Even worse, you don't know if your numbers are close to the actual code or way off the mark. The only solution is to simply guess a new combination and try again.

Similarly, when a newly created drug doesn't bind well to its intended target, the drug won't work. Scientists are then forced to go back to the lab, often with very little indication about why the binding was weak. The next step is to choose a different pharmaceutical "combination" and hope for better results. Georgia Tech researchers have now generated a computer model that could help change that blind process.

Symmetry-adapted perturbation theory (SAPT) allows scientists to study interactions between molecules, such as those between a drug and its target. In the past, computer algorithms that study these noncovalent interactions have been very slow, limiting the types of molecules that can be studied using accurate quantum mechanical methods. A research team headed by Georgia Tech Professor of Chemistry David Sherrill has developed a computer program that can study larger molecules (more than 200 atoms) faster than any other program in existence.

"Our fast energy component analysis program is designed to improve our knowledge about why certain molecules are attracted to one another," explained Sherrill, who also has a joint appointment in the School of Computational Science and Engineering. "It can also show us how interactions between molecules can be tuned by chemical modifications, such as replacing a hydrogen atom with a fluorine atom. Such knowledge is key to advancing rational drug design."

The algorithms can also be used to improve the understanding of crystal structures and energetics, as well as the 3D arrangement of biological macromolecules. Sherrill's team used the software to study the
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Contact: Jason Maderer
maderer@gatech.edu
404-385-2966
Georgia Institute of Technology
Source:Eurekalert  

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