Timothy Wencewicz

Assistant Professor of Chemistry

Timothy Wencewicz

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Wencewicz’ research is dedicated to the discovery of new antibacterial scaffolds and drug delivery systems that act against underexploited biological targets and overcome known resistance mechanisms.

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Tim Wencewicz

Wencewicz wins Sloan fellowship

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.

A ring to bind them

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.

Antibiotic resistance circumvented in lab

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.

Antibiotics: Thinking outside the vial

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.

Slaying bacteria with their own weapons

A novel antibiotic delivery system would exploit small molecules called siderophores that bacteria secrete to scavenge for iron in their environments. Each bacterium has its own system of siderophores, which it pumps across its cell membrane before releasing the iron the siderophores hold. If an antibiotic were linked to one of these scavenger molecules, it would be converted into a tiny Trojan horse that would smuggle antibiotics inside a bacterium’s cell membrane.