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A unique bacterial secretion machinery with multiple secretion centers

26 Apr 2022

Abstract excerpt

The Porphyromonas gingivalis type IX secretion system (T9SS) promotes periodontal disease by secreting gingipains and other virulence factors. By in situ cryoelectron tomography, we report that the P. gingivalis T9SS consists of 18 PorM dimers arranged as a large, caged ring in the periplasm. Near the outer membrane, PorM dimers interact with a PorKN ring complex of ∼52 nm in diameter. PorMKN translocation...

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PMID: 35471908
DOI: 10.1073/pnas.2119907119

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