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Significance MreB is a bacterial actin that supports cell wall synthesis and rod-like morphology in many bacteria. In the bacteriumMyxococcus xanthus , MreB is also required for gliding motility. In this work, we studied the movement of MreB particles duringM. xanthus gliding motility at high spatial and temporal resolution. We found that MreB provides a scaffold for the gliding motors while the gliding machinery drives the movement of MreB filaments. The interplay between MreB and the gliding machineries is analogous to the interdependent movements of myosin motors and actin in eukaryotic cells. Since their discovery, actin-like homologs have been implicated in many spatially organized cellular processes in bacteria. This study expands our knowledge of MreB function in bacterial gliding motility.

MotAB-like machinery drives the movement of MreB filaments during bacterial gliding motility