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Journal of Bacteriology, March 2007, p. 2125-2127, Vol. 189, No. 5
0021-9193/07/$08.00+0     doi:10.1128/JB.01284-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Possible Nonconductive Role of Geobacter sulfurreducens Pilus Nanowires in Biofilm Formation{triangledown}

Gemma Reguera,* Rachael B. Pollina,{dagger} Julie S. Nicoll,{ddagger} and Derek R. Lovley

Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003

Received 14 August 2006/ Accepted 29 November 2006

Geobacter sulfurreducens required expression of electrically conductive pili to form biofilms on Fe(III) oxide surfaces, but pili were also essential for biofilm development on plain glass when fumarate was the sole electron acceptor. Furthermore, pili were needed for cell aggregation in agglutination studies. These results suggest that the pili of G. sulfurreducens also have a structural role in biofilm formation.

* Corresponding author. Present address: Department of Microbiology and Molecular Genetics, 2215 Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320. Phone: (517) 355-6463. Fax: (517) 353-8957. E-mail: reguera{at}msu.edu.

{triangledown} Published ahead of print on 8 December 2006.

{dagger} Present address: Infectious Diseases Department, The Mount Sinai School of Medicine, New York, NY 10029.

{ddagger} Present address: Center for Adaptation Genetics and Drug Resistance, Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111.

Journal of Bacteriology, March 2007, p. 2125-2127, Vol. 189, No. 5
0021-9193/07/$08.00+0     doi:10.1128/JB.01284-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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