Pathogens

Sev­eral bac­te­r­ial and viral pathogens hijack the actin machin­ery of cells they infect to dis­sem­i­nate their infec­tion. They do this by recruit­ing actin and co-factors to pro­pel them in cyto­plasm in a rock­et­ing type régime, at the head of an actin comet tail, to jump from one cell to another, avoid­ing the sur­veil­lance of the immune sys­tem. Our recent work has focused on elu­ci­dat­ing the mech­a­nism of pathogen propul­sion.

Actin can push pathogens of var­i­ous sizes

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Comets are com­posed of a fishbone-like array of actin

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Actin comets can form on iso­lated bac­ulovirus cap­sids

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Actin branches are also found in Lis­te­ria comets

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Sim­u­la­tions test cur­rent mod­els of propul­sion

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