Shigella IpaA mediates actin bundling through diffusible vinculin oligomers with activation imprint

Valencia-Gallardo et al. show that the Shigella invasion effector IpaA induces major conformational changes in the vinculin head domain leading to vinculin oligomerization and actin filament bundling. This non-canonical mode of vinculin activation is required for bacterial invasion and may also be pertinent for the formation of cell adhesion structures.

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