BMBDG Seminar: Ph.D. Exit Seminar – Bronwyn Lyons

Posted on March 31, 2022

Title: Structural investigation of the Enteropathogenic Escherichia coli type 3 secretion system.

Abstract: “Enteropathogenic Escherichia coli (EPEC) is frequently a cause of diarrheal disease, stemming from produce contamination due to farm waste run-offs, and inadequate supply of clean water. Virulence mechanisms that these bacteria employ to cause disease are conserved across many pathogens, such as those responsible for sexually transmitted infections (e.g. chlamydia) or food poisoning (e.g. salmonellosis). The type 3 secretion system (T3SS) is a syringe-like proteinaceous channel that spans the inner and outer membranes of the bacterial cell, projecting into the extracellular medium where it interacts with the host cell membrane to deliver virulence factors. As with many virulence mechanisms, the T3SS is not required for the survival of these bacteria and therefore are promising targets for the development of anti-virulence compounds that can potentially block their propensity to cause disease. The overall goal of this thesis has been to study the T3SS of EPEC by employing a toolbox of structural biology methods. Components of the system in EPEC are studied using various cryo-electron microscopy techniques and nuclear magnetic spectroscopy. Structural characterization of T3SS components allows for inference of function and exploration of these hypotheses using in vivo methods. This work furthers our comprehension about the structure, and by extension function, of the components that comprise the Gram-negative T3SS virulence machinery in EPEC and lays the foundation for development of anti-virulence therapeutics  targeting a variety of pathogenic bacteria. ”

Monday, July 04, 2022 at 2:30 pm – 3:30 pm via Zoom

Hosted by: Dr. Natalie Strynadka