Listeriolysin O-dependent host surfaceome remodeling modulates Listeria monocytogenes invasion

Pathog Dis. 2018 Nov 1;76(8):fty082. doi: 10.1093/femspd/fty082.

Abstract

Listeria monocytogenes is a pathogenic bacterium that invades epithelial cells by activating host signaling cascades, which promote bacterial engulfment within a phagosome. The pore-forming toxin listeriolysin O (LLO), which is required for bacteria phagosomal escape, has also been associated with the activation of several signaling pathways when secreted by extracellular bacteria, including Ca2+ influx and promotion of L. monocytogenes entry. Quantitative host surfaceome analysis revealed significant quantitative remodeling of a defined set of cell surface glycoproteins upon LLO treatment, including a subset previously identified to play a role in the L. monocytogenes infection process. Our data further shows that the lysosomal-associated membrane proteins LAMP-1 and LAMP-2 are translocated to the cellular surface and those LLO-induced Ca2+ fluxes are required to trigger the surface relocalization of LAMP-1. Finally, we identify late endosomes/lysosomes as the major donor compartments of LAMP-1 upon LLO treatment and by perturbing their function, we suggest that these organelles participate in L. monocytogenes invasion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Toxins / metabolism*
  • Endocytosis*
  • Endosomes / metabolism
  • Endosomes / microbiology
  • Epithelial Cells / microbiology*
  • HeLa Cells
  • Heat-Shock Proteins / metabolism*
  • Hemolysin Proteins / metabolism*
  • Host-Pathogen Interactions*
  • Humans
  • Listeria monocytogenes / metabolism
  • Listeria monocytogenes / physiology*
  • Lysosomes / metabolism
  • Lysosomes / microbiology
  • Membrane Proteins / analysis*
  • Proteome / analysis*

Substances

  • Bacterial Toxins
  • Heat-Shock Proteins
  • Hemolysin Proteins
  • Membrane Proteins
  • Proteome
  • hlyA protein, Listeria monocytogenes