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Journal of Bacteriology, September 2007, p. 6727-6730, Vol. 189, No. 18
0021-9193/07/$08.00+0     doi:10.1128/JB.00902-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

The las Enzymes Control Pyruvate Metabolism in Lactococcus lactis during Growth on Maltose{triangledown}

Christian Solem,1 Brian Koebmann,2 Fen Yang,1 and Peter R. Jensen1*

Systems Microbiology, BioCentrum-DTU, Technical University of Denmark, Building 301, DK-2800 Kgs. Lyngby, Denmark,1 Fermenco ApS, Technical University of Denmark, Building 301, DK-2800 Kgs. Lyngby, Denmark2

Received 8 June 2007/ Accepted 28 June 2007

The fermentation pattern of Lactococcus lactis with altered activities of the las enzymes was examined on maltose. The wild type converted 65% of the maltose to mixed acids. An increase in phosphofructokinase or lactate dehydrogenase expression shifted the fermentation towards homolactic fermentation, and with a high level of expression of the las operon the fermentation was homolactic.

* Corresponding author. Mailing address: Systems Microbiology, BioCentrum-DTU, Technical University of Denmark, Building 301, DK-2800 Kgs. Lyngby, Denmark. Phone: 45 45252510. Fax: 45 45932809. E-mail: prj{at}biocentrum.dtu.dk

{triangledown} Published ahead of print on 6 July 2007.

Journal of Bacteriology, September 2007, p. 6727-6730, Vol. 189, No. 18
0021-9193/07/$08.00+0     doi:10.1128/JB.00902-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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