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Drug discovery potential of natural microbial genomes
Date:1/22/2014

Scientists at the University of California, San Diego have developed a new genetic platform that allows efficient production of naturally occurring molecules, and have used it to produce a novel antibiotic compound. Their study, published this week in PNAS, may open new avenues for natural product discoveries and drug development.

According to lead investigator Bradley S. Moore, PhD, of the Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences at UC San Diego, the findings demonstrate a "plug and play" technique to trigger previously unknown biosynthetic pathways and identify natural product drug candidates.

"In my opinion, the new synthetic biology technology we developed which resulted in the discovery of a new antibiotic from a marine bacterium is just the tip of the iceberg in terms of our ability to modernize the natural product drug discovery platform," Moore said.

The ocean, covering 70 percent of the earth's surface, is a rich source of new microbial diversity for the discovery of new natural products effective as drugs for treating infections, cancer and other important medical conditions. Most natural antibiotics are complex molecules that are assembled by a special group of enzymes genetically encoded in the microbe's chromosome.

But it often proves difficult to grow the newly discovered ocean bacteria in the laboratory, or to get them to produce their full repertoire of natural products.

The UC San Diego scientists harvested a set of genes predicted to encode a natural product from ocean bacteria, then used the synthetic biology technology to identify and test a totally new antibiotic taromycin A found to be effective in fighting drug-resistant MRSA.

"Antibiotic resistance is critical challenge to the public health. Most antibiotics, such as penicillin, used in human medicine are natural molecules originally isolated from microbes in the soil or ra
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Contact: Debra Kain
ddkain@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert

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