Publication Date:
1996-08-30
Description:
Upon contact with the eukaryotic cell, Yersinia pseudotuberculosis increased the rate of transcription of virulence genes (yop), as determined by in situ monitoring of light emission from individual bacteria expressing luciferase under the control of the yopE promoter. The microbe-host interaction triggered export of LcrQ, a negative regulator of Yop expression, via the Yop-type III secretion system. The intracellular concentration of LcrQ was thereby lowered, resulting in increased expression of Yops. These results suggest a key role for the type III secretion system of pathogenic bacteria to coordinate secretion with expression of virulence factors after physical contact with the target cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pettersson, J -- Nordfelth, R -- Dubinina, E -- Bergman, T -- Gustafsson, M -- Magnusson, K E -- Wolf-Watz, H -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1231-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Molecular Biology, University of Umea, S-901 87 Umea, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703058" target="_blank"〉PubMed〈/a〉
Keywords:
*Bacterial Adhesion
;
Bacterial Outer Membrane Proteins/biosynthesis/*genetics/secretion
;
Bacterial Proteins/genetics/*secretion
;
Calcium/metabolism
;
Culture Media
;
Cytosol/metabolism
;
*Gene Expression Regulation, Bacterial
;
HeLa Cells
;
Humans
;
Mutation
;
Up-Regulation
;
Virulence/*genetics
;
Yersinia pseudotuberculosis/genetics/metabolism/*pathogenicity
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink