Abstract
A 9.5-kilobase plasmid of Yersinia pestis , the causative agent of plague, is required for high virulence when mice are inoculated with the bacterium by subcutaneous injection. Inactivation of the plasmid gene pla , which encodes a surface protease, increased the median lethal dose of the bacteria for mice by a millionfold. Moreover, cloned pla was sufficient to restore segregants lacking the entire pla - bearing plasmid to full virulence. Both pla + strains injected subcutaneously and pla - mutants injected intravenously reached high titers in liver and spleen of infected mice, whereas pla - mutants injected subcutaneously failed to do so even though they establish a sustained local infection at the injection site. More inflammatory cells accumulated in lesions caused by the pla - mutants than in lesions produced by the pla + parent. The Pla protease was shown to be a plasminogen activator with unusual kinetic properties. It can also cleave complement C3 at a specific site.
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 7:03 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 10, 2024, 10:08 p.m.) |
Indexed | 4 weeks, 2 days ago (July 24, 2025, 7:07 a.m.) |
Issued | 32 years, 9 months ago (Nov. 6, 1992) |
Published | 32 years, 9 months ago (Nov. 6, 1992) |
Published Print | 32 years, 9 months ago (Nov. 6, 1992) |
@article{Sodeinde_1992, title={A Surface Protease and the Invasive Character of Plague}, volume={258}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1439793}, DOI={10.1126/science.1439793}, number={5084}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Sodeinde, Ola A. and Subrahmanyam, Y. V. B. K. and Stark, Kimberly and Quan, Thomas and Bao, Youdi and Goguen, Jon D.}, year={1992}, month=nov, pages={1004–1007} }