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New tool in the fight against tuberculosis
Date:10/7/2010

Researchers at the Institute for Genomic Biology at the University of Illinois have developed a way to harness the prodigious quantities of both genomic and metabolic data being generated with high-throughput genomics and other techniques. They have developed an algorithm that automatically integrates both data sets. The model, called probabilistic regulation of metabolism (PROM), enables researchers to perturb a given regulatory gene or metabolic process and see how that affects the entire network.

"PROM provides a platform for studying the behavior of networks in a wide range of different conditions," says principal investigator Nathan Price, an associate professor of chemical and biomolecular engineering at Illinois.

Using this model the researchers have created the first genome-scale, regulatory-metabolic network of Mycobacterium tuberculosis. Their results were published online by PNAS on September 27.

Using E. Coli as a benchmark, Price and graduate student Sriram Chandrasekaran showed that PROM was more accurate and comprehensive than the previous model for E. Coli, which had been done by hand and published in 2004.

After using E. Coli as a proof of principle, they targeted tuberculosis, a bacterium that has not been as thoroughly studied as E. Coli. Price and Chandrasekaran had less than half the amount of data then they had for E. Coli and were still able to create a model that predicted knockout phenotypes 95 percent of the time, says Price.

Price and Chandrasekaran built the algorithm using microarray data, transcription-factor interactions that regulate metabolic reactions, and knock-out phenotypes. The method is both accurate and fast. PROM may prove particularly helpful to tuberculosis researchers because, although when tuberculosis is growing it can be killed, the real challenge is to target the bacterium during its dormant or quiescent stage. PROM may ena
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Contact: Melissa Edwards
mme@illinois.edu
217-333-0873
Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Source:Eurekalert  

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