How Electric Fields Control Lysenin Ion Channels
Location
Student Center
Document Type
Poster
Start Date
27-8-2026 11:40 AM
End Date
27-8-2026 12:40 PM
Description
Lysenin is a pore-forming protein that creates ion channels in biological membranes. These channels respond to applied voltage by transitioning between open and closed states. This project examines an effective electric dipole model proposed to explain this voltage-induced gating. The model suggests that an applied electric field interacts with a dipole within the protein, producing torque that causes molecular movement and channel closure. Researchers tested this model using lysenin mutations, changes in solution viscosity, and molecular dynamics simulations. Mutations that weakened the proposed dipole increased the voltage required for channel closure, while increased viscosity slowed the gating process. These results support the idea that electric-field-induced torque and protein motion contribute to voltage-dependent lysenin gating.
How Electric Fields Control Lysenin Ion Channels
Student Center
Lysenin is a pore-forming protein that creates ion channels in biological membranes. These channels respond to applied voltage by transitioning between open and closed states. This project examines an effective electric dipole model proposed to explain this voltage-induced gating. The model suggests that an applied electric field interacts with a dipole within the protein, producing torque that causes molecular movement and channel closure. Researchers tested this model using lysenin mutations, changes in solution viscosity, and molecular dynamics simulations. Mutations that weakened the proposed dipole increased the voltage required for channel closure, while increased viscosity slowed the gating process. These results support the idea that electric-field-induced torque and protein motion contribute to voltage-dependent lysenin gating.