The inverse autotransporter intimin exports its passenger domain via a hairpin intermediate.

Abstract excerpt

Autotransporter proteins comprise a large family of virulence factors that consist of a β-barrel translocation unit and an extracellular effector or passenger domain. The β-barrel anchors the protein to the outer membrane of Gram-negative bacteria and facilitates the transport of the passenger domain onto the cell surface. By inserting an epitope tag into the N terminus of the passenger domain of the inverse...

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