Deciphering interplay between Salmonella invasion effectors

Robert J Cain, Richard D Hayward, Vassilis Koronakis

Research output: Contribution to journalArticlepeer-review


Bacterial pathogens have evolved a specialized type III secretion system (T3SS) to translocate virulence effector proteins directly into eukaryotic target cells. Salmonellae deploy effectors that trigger localized actin reorganization to force their own entry into non-phagocytic host cells. Six effectors (SipC, SipA, SopE/2, SopB, SptP) can individually manipulate actin dynamics at the plasma membrane, which acts as a 'signaling hub' during Salmonella invasion. The extent of crosstalk between these spatially coincident effectors remains unknown. Here we describe trans and cisbinary entry effector interplay (BENEFIT) screens that systematically examine functional associations between effectors following their delivery into the host cell. The results reveal extensive ordered synergistic and antagonistic relationships and their relative potency, and illuminate an unexpectedly sophisticated signaling network evolved through longstanding pathogen-host interaction.
Original languageEnglish
Article numbere1000037
JournalPLoS Pathogens
Issue number4
Publication statusPublished - Apr 2008


  • Actins
  • Animals
  • Bacterial Proteins
  • Calcium-Binding Proteins
  • Cell Membrane
  • Cytoskeleton
  • Host-Pathogen Interactions
  • Mice
  • Microfilament Proteins
  • NIH 3T3 Cells
  • Phosphatidylinositols
  • Salmonella typhimurium
  • Signal Transduction


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