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Journal of Bacteriology, August 2008, p. 5512-5516, Vol. 190, No. 15
0021-9193/08/$08.00+0     doi:10.1128/JB.00514-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Direct Involvement of Type II Secretion System in Extracellular Translocation of Shewanella oneidensis Outer Membrane Cytochromes MtrC and OmcA{triangledown}

Liang Shi,1* Shuang Deng,1 Matthew J. Marshall,1 Zheming Wang,1 David W. Kennedy,1 Alice C. Dohnalkova,1 Heather M. Mottaz,1 Eric A. Hill,1 Yuri A. Gorby,2 Alexander S. Beliaev,1 David J. Richardson,3 John M. Zachara,1 and James K. Fredrickson1*

Pacific Northwest National Laboratory, Richland, Washington 99354,1 J. Craig Venter Institute, La Jolla, California 92037,2 Schools of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom3

Received 15 April 2008/ Accepted 19 May 2008

MtrC and OmcA are cell surface-exposed lipoproteins important for reducing solid metal oxides. Deletions of type II secretion system (T2SS) genes reduced their extracellular release and their accessibility to the proteinase K treatment, demonstrating the direct involvement of T2SS in translocation of MtrC and OmcA to the bacterial cell surface.

* Corresponding authors. Mailing address: Microbiology Group, Pacific Northwest National Laboratory, 902 Battelle Blvd., P.O. Box 999, MSIN P7-50, Richland, WA 99354. Phone for L. Shi: (509) 376-4834. Fax: (509) 372-1632. E-mail: liang.shi{at}pnl.gov. Phone for J. K. Fredrickson: (509) 376-7063. Fax: (509) 376-4909. E-mail: jim.fredrickson{at}pnl.gov

{triangledown} Published ahead of print on 23 May 2008.

Journal of Bacteriology, August 2008, p. 5512-5516, Vol. 190, No. 15
0021-9193/08/$08.00+0     doi:10.1128/JB.00514-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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