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CPLC Seminar: Keith Cassidy (University of Oxford) "Computing the Bacterial Brain: Molecular modeling and simulations of bacterial chemosensory arrays"

Event Type
Seminar/Symposium
Sponsor
Zan
Date
Nov 15, 2019   2:00 pm  
Speaker
Keith Cassidy (University of Oxford)
Contact
LaShonya Quince
E-Mail
lquince@illinois.edu
Phone
217-300-6726
Views
88
Originating Calendar
Physics - Biological Physics (CPLC/iPoLS) Seminar

Chemotactic bacteria navigate their habitats by monitoring and responding to environmental chemical gradients. For numerous human and plant pathogens, this behavior is essential for effective colonization and infection. The chemotaxis process requires large, highly-ordered transmembrane protein complexes known as chemosensory arrays. Functioning as a kind of bacterial brain, chemosensory arrays convert the binding of chemical ligands (sensory input) into changes in cell swimming pattern (motile output) using a universally-conserved architecture. In this talk, I will discuss recent work combining cryo-electron tomography with molecular modeling and simulation to produce the first, high-resolution structural characterization of a complete bacterial chemosensory array, namely that of the model organism E. coli. I will also relate ongoing computational efforts to describe the residue-level details of critical sensory signal transduction mechanisms within the array. These results, combined with genetic and biochemical approaches, provide a much-needed molecular basis for the design of new experiments and the development of a comprehensive model of bacterial chemosensing.

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