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American Society for Microbiology honors Timothy Yahr with 2004 Merck Irving S. Sigal Memorial Award

WASHINGTON, DC--APRIL 23, 2004--Timothy L. Yahr, Ph.D., Assistant Professor of Microbiology at the University of Iowa, Iowa City, will receive the 2004 Merck Irving S. Sigal Memorial Award from the American Society for Microbiology (ASM). Supported by an unrestricted educational grant from Merck Research Laboratories, Inc., two Sigal Awards are presented for excellence in basic research in medical microbiology and infectious disease. The awards are given in memory of Irving S. Sigal, who was instrumental in the early discovery of therapies to treat human immunodeficiency virus/AIDS.

Yahr is honored for important work on the genetics and physiology of Pseudomonas aeruginosa and Escherichia coli, research that is already suggesting new paths for treating infections caused by these microorganisms.

While still a graduate student, Yahr discovered the type III secretion system in P. aeruginosa. This system acts like a syringe to inject toxins from P. aeruginosa into the host cell. In addition, he defined the genes required for this system to function, key elements governing its expression, and several of the virulence factors it secreted. As a result of this groundbreaking research, one of the type III proteins has been identified as a possible vaccine candidate for the treatment of Pseudomonas infections in patients with cystic fibrosis, AIDS, or other disorders, for whom treatment options are often quite limited.

Yahr's other research interests have important clinical implications as well. As a postdoctoral fellow at Dartmouth Medical School, Hanover, New Hampshire, he became interested in improving the technology for studying the twin-arginine translocation (TAT) system, a poorly understood mechanism for moving folded preproteins across or into the inner membrane of E. coli. He developed a TAT translocation assay that is now being used in several laboratories in the United States and Europe. TAT translocation has recently been id
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Contact: Barbara Hyde
bhyde@asmusa.org
202-942-9206
American Society for Microbiology
30-Apr-2004


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