Researchers from Arts & Sciences have solved the X-ray crystal structure of the enzyme that makes obafluorin — a broad spectrum antibiotic agent made by a fluorescent strain of soil bacteria. This new class of antibiotics might provide a powerful antidote to the growing scourge of antibiotic resistance.
The Alfred P. Sloan Foundation announced Feb. 15 that Timothy A. Wencewicz, assistant professor of chemistry in Arts & Sciences at Washington University in St. Louis, has been awarded a 2018 Sloan Research Fellowship. He is among 126 outstanding U.S. and Canadian researchers selected as fellowship recipients this year.
Using genomics, a chemistry lab has worked out the biosynthetic machinery that makes a new class of antibiotic compounds called the beta-lactones. Like the beta-lactams, such as penicillin, they have an unstable four-member ring. The key to their antibiotic activity, it is also difficult to synthesize.
As dangerous bacteria grow more savvy at evading antibiotics, researchers are seeking new ways to counterattack. Rather than design new drugs from scratch, some scientists are searching for ways to block the microbes’ evasive maneuvers. If resistance can be shut down, current drugs should remain effective. That concept is demonstrated in a new study from the School of Medicine.
Given that antibiotics are losing effectiveness faster than we are finding replacements for them, chemist Timothy Wencewicz in Arts & Sciences at Washington University in St. Louis suggests a new approach. Drugs that hobble the production of virulence factors — small molecules that help bacteria to establish an infection in a host — would put much less selective pressure on bacteria and delay resistance.