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Deletion of the yiaMNO transporter genes affects the growth characteristics of Escherichia coli K-12

Titia H. Plantinga^1,

Chris van der Does^1,

Geertje van Keulen^2,

¹ Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, PO Box 14, 9750, AA Haren, The Netherlands
² Department of Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, PO Box 14, 9750, AA Haren, The Netherlands

Correspondence
Arnold J. M. Driessen
a.j.m.driessen{at}rug.nl

Binding-protein-dependent secondary transporters make up a unique transport protein family. They use a solute-binding protein in proton-motive-force-driven transport. Only a few systems have been functionally analysed. The yiaMNO genes of Escherichia coli K-12 encode one family member that transports the rare pentose L-xylulose. Its physiological role is unknown, since wild-type E. coli K-12 does not utilize L-xylulose as sole carbon source. Deletion of the yiaMNO genes in E. coli K-12 strain MC4100 resulted in remarkable changes in the transition from exponential growth to the stationary phase, high-salt survival and biofilm formation.

Present address: Institute of Biochemistry, Biocenter, Goethe-Universität Frankfurt, Marie Curie Straße 9, D-60439 Frankfurt, Germany.

Present address: Department of Molecular Microbiology, John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH, UK.

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