DOI: 10.1111/j.1365-2958.2005.04738.x. Selection and characterization of <i>Yersinia pestis</i> YopN mutants that constitutively block Yop secretion

Selection and characterization of Yersinia pestis YopN mutants that constitutively block Yop secretion

10.1111/j.1365-2958.2005.04738.x

Crossref journal-article

Wiley

Molecular Microbiology (311)

Abstract

SummarySecretion of Yop effector proteins by the Yersinia pestis plasmid pCD1‐encoded type III secretion system (T3SS) is regulated in response to specific environmental signals. Yop secretion is activated by contact with a eukaryotic cell or by growth at 37°C in the absence of calcium. The secreted YopN protein, the SycN/YscB chaperone and TyeA form a cytosolic YopN/SycN/YscB/TyeA complex that is required to prevent Yop secretion in the presence of calcium and prior to contact with a eukaryotic cell. The mechanism by which these proteins prevent secretion and the subcellular location where the block in secretion occurs are not known. To further investigate both the mechanism and location of the YopN‐dependent block, we isolated and characterized several YopN mutants that constitutively block Yop secretion. All the identified amino‐acid substitutions that resulted in a constitutive block in Yop secretion mapped to a central domain of YopN that is not directly involved in the interaction with the SycN/YscB chaperone or TyeA. The YopN mutants required an intact TyeA‐binding domain and TyeA to block secretion, but did not require an N‐terminal secretion signal, an intact chaperone‐binding domain or the SycN/YscB chaperone. These results suggest that a C‐terminal domain of YopN complexed with TyeA blocks Yop secretion from a cytosolic, not an extracellular, location. A hypothetical model for how the YopN/SycN/YscB/TyeA complex regulates Yop secretion is presented.

Bibliography

Ferracci, F., Schubot, F. D., Waugh, D. S., & Plano, G. V. (2005). Selection and characterization of Yersinia pestis YopN mutants that constitutively block Yop secretion. Molecular Microbiology, 57(4), 970â987. Portico.

Authors 4

Franco Ferracci (first)
Florian D. Schubot (additional)
David S. Waugh (additional)
Gregory V. Plano (additional)

References 57 Referenced 79

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Dates

Type	When
Created	20 years ago (July 29, 2005, 12:22 p.m.)
Deposited	1 year, 10 months ago (Sept. 27, 2023, 12:28 p.m.)
Indexed	4 months, 2 weeks ago (April 8, 2025, 8:01 p.m.)
Issued	20 years, 1 month ago (June 30, 2005)
Published	20 years, 1 month ago (June 30, 2005)
Published Online	20 years, 1 month ago (June 30, 2005)
Published Print	20 years ago (Aug. 1, 2005)

Funders 0

None

BibTeX

@article{Ferracci_2005, title={Selection and characterization of Yersinia pestis YopN mutants that constitutively block Yop secretion}, volume={57}, ISSN={1365-2958}, url={http://dx.doi.org/10.1111/j.1365-2958.2005.04738.x}, DOI={10.1111/j.1365-2958.2005.04738.x}, number={4}, journal={Molecular Microbiology}, publisher={Wiley}, author={Ferracci, Franco and Schubot, Florian D. and Waugh, David S. and Plano, Gregory V.}, year={2005}, month=jun, pages={970–987} }

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