Welcome to the Henzler-Wildman Lab

Integral membrane proteins control to the movement of molecules and signals across the membrane. To fully understand the function of these dynamic proteins requires knowledge of the timescale, amplitude, and direction of structural changes. We use NMR as our primary technique to monitor protein structure and dynamics, taking advantage of the extensive resources available through NMRFAM. By comparing our NMR data with biochemical and functional assays, we gain insight into the mechanisms of secondary active transport, multidrug recognition, ion channel gating and ion selectivity. 

EmrE and other small multidrug resistance (SMR) transporters

Our research on EmrE focuses on three distinct themes:

  • The multidrug activity of EmrE – How does such a small transporter recognize and transport such a diverse class of substrates?

 

  • The mechanism of secondary active transport – How are proton and substrate transport coupled so that the proton motive force can be harnessed to drive drug efflux?

 

  • The native function of EmrE – The small multidrug transporter family includes both apparent multidrug efflux pumps, like EmrE, and more specific transporters of guanidinium or other metabolites. What features define members of each class and how did this family evolve to include such diverse functions?

Other Projects

NaK, a bacterial non-selective cation channel

The NaK project investigates the role of protein dynamics in the molecular mechanism of ion selectivity, gating, and coupling between the inner gate and selectivity filter.

Temperature sensing

We are collaborating the with Chanda Lab to study how ion channels sense and respond to temperature and test the heat capacity hypothesis for temperature sensing by ion channels.