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Journal of Bacteriology, June 2007, p. 4539-4543, Vol. 189, No. 12
0021-9193/07/$08.00+0 doi:10.1128/JB.00378-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
pH-Dependent Association of Enolase and Glyceraldehyde-3-Phosphate Dehydrogenase of Lactobacillus crispatus with the Cell Wall and Lipoteichoic Acids
Jenni Antikainen,
Veera Kupannen,
Kaarina Lähteenmäki, and
Timo K. Korhonen*
General Microbiology, Faculty of Biosciences, P.O. Box 56, FIN-00014 University of Helsinki, Finland
Received 14 March 2007/
Accepted 5 April 2007
The plasminogen-binding proteins enolase and glyceraldehyde-3-phosphate dehydrogenase of Lactobacillus crispatus were localized on the cell surface at pH 5 but released into the medium at an alkaline pH. These proteins bound to lipoteichoic acids at a pH below their isoelectric point. The results indicate that lactobacilli rapidly modify their surface properties in response to changes in pH.
* Corresponding author. Mailing address: General Microbiology, Faculty of Biosciences, P.O. Box 56, FIN-00014 University of Helsinki, Finland. Phone: 358-9-19159250. Fax: 358-9-19159262. E-mail:
timo.korhonen{at}helsinki.fi
Published ahead of print on 20 April 2007.
Journal of Bacteriology, June 2007, p. 4539-4543, Vol. 189, No. 12
0021-9193/07/$08.00+0 doi:10.1128/JB.00378-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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