Ejectosome

An ejectosome is a cellular organelle responsible for ejecting their contents from the cell.

Large ejectisomes, visible under the light microscope, are associated with the pocket; smaller ones occur elsewhere on the cell.

[2] Mycobacteria are ejected from host cells through the action of an actin-based ejectosome.

This escape mechanism requires a cytoskeleton regulator from the host plus an intact mycobacterial ESX-1 secretion system.

Ejectosomes apparently exert a contractile force, forming a tight septum around the bacteria.