The translocated Salmonella effector proteins SseF and SseG interact and are required to establish an intracellular replication niche

Infect Immun. 2006 Dec;74(12):6965-72. doi: 10.1128/IAI.00648-06. Epub 2006 Oct 2.

Abstract

The facultative intracellular pathogen Salmonella enterica causes a variety of diseases, including gastroenteritis and typhoid fever. Inside epithelial cells, Salmonella replicates in vacuoles, which localize in the perinuclear area in close proximity to the Golgi apparatus. Among the effector proteins translocated by the Salmonella pathogenicity island 2-encoded type III secretion system, SifA and SseG have been shown necessary but not sufficient to ensure the intracellular positioning of Salmonella vacuoles. Hence, we have investigated the involvement of other secreted effector proteins in this process. Here we show that SseF interacts functionally and physically with SseG but not SifA and is also required for the perinuclear localization of Salmonella vacuoles. The observations show that the intracellular positioning of Salmonella vacuoles is a complex phenomenon resulting from the combined action of several effector proteins.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bacterial Proteins / analysis
  • Bacterial Proteins / genetics
  • Bacterial Proteins / metabolism*
  • Cells, Cultured
  • Golgi Apparatus / chemistry
  • Golgi Apparatus / metabolism
  • Humans
  • Mice
  • Mice, Inbred Strains
  • Protein Interaction Mapping
  • Protein Structure, Tertiary
  • Protein Transport
  • Salmonella enterica / genetics
  • Salmonella enterica / physiology*
  • Vacuoles / chemistry
  • Vacuoles / microbiology*
  • Vacuoles / ultrastructure

Substances

  • Bacterial Proteins