Live imaging of bacterial actin MreBs causing helicity switching of a minimal synthetic cell
Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
Spiroplasma swim by shifting their helical body into right-handed and left-handed. Bacterial actin, MreB4 and MreB5 are involved in this helicity formation and shifting. Fluorescent labeling of each MreB and manipulating expression levels revealed that MreB4 is more structurally constrained and lower expression level required for motility than MreB5. Photobleaching and photoactivation indicated that MreB5 remains in place during movement. Treatment with MreB polymerization inhibitor A22 caused helix deformation, movement stall, and diffusion of MreB5 fluorescence. This indicates that A22 disrupts MreB5 interactions that are required for movement. These results have several implications for the mechanism and suggest that frequent MreB5 replacement during cell movement is unlikely.
