Abstract

Helicobacter pylori type IV secretion system injects the oncoprotein CagA into epithelial cells to drive carcinogenesis. In this issue of Cell Host & Microbe, Tegtmeyer etal. (2017) show that a secreted bacterial protease disrupts apical-junctional complexes, paving the way for H.pylori to access the basolateral compartment and trigger pathogenesis.

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