Collective response of self-organised clusters of mechanosensitive channels

TL;DR

This study models how the spatial distribution and clustering of bacterial mechanosensitive channels influence their activation, revealing that channel aggregation leads to cooperative gating behavior with significant cellular effects.

Contribution

It introduces an Ising-like model to predict channel clustering and cooperative gating based on elastic interactions, a novel approach in this context.

Findings

Channel clustering enhances cooperative gating behavior

Aggregation impacts cell response to membrane tension

Elastic interactions drive channel organization

Abstract

Mechanosensitive channels are ion channels activated by membrane tension. We investigate the influence of bacterial mechanosensitive channels spatial distribution on activation (gating). Based on elastic short-range interactions we map this physical process onto an Ising-like model, which enables us to predict the clustering of channels and the effects of clustering on their gating. We conclude that the aggregation of channels and the consequent interactions among them leads to a global cooperative gating behaviour with potentially dramatic consequences for the cell.