Observation of the intracellular behavior of recombinant Yersinia pseudotuberculosis invasin protein

Hisashi Koga, Ichiro Izawa, Norie Araki, Hideyuki Saya, Tatsuyuki Mimori

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In this study, we observed the intracellular behavior of recombinant invasin, a 103-kDa outer membrane protein of Yersinia pseudotuberculosis. To mimic the in vivo behavior of bacterial invasin, a polyvalent form of invasin was generated by incubation of biotinylated GST-fused invasin C-terminal portion protein (GST-INVS) with avidin. Several experiments confirmed that the recombinant invasin could consistently reproduce the invasin-mediated entry to mammalian epithelial cells. We analyzed the molecular kinetics of polyvalent INVS by western blotting, 125I-uptake, and immunofluorescent microscopy. The internalized polyvalent INVS was rapidly translocated to the RIPA-insoluble (polymerized-actin enriched) fraction and formed cytoplasmic vesicles, while monovalent invasin did not show such kinetics. From these observations, we concluded that our bacterial-free system is able to analyze the action of invasin for Yersinia pseudotuberculosis entry.

本文言語English
ページ(範囲)297-302
ページ数6
ジャーナルMicrobiology and Immunology
49
4
DOI
出版ステータスPublished - 2005
外部発表はい

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Virology

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