Metabolic analysis of S. cerevisiae strains engineered for malolactic fermentation.
A complete malolactic fermentation was achieved using Saccharomyces cerevisiae strains coexpressing the genes mleS and mae1 coding for the Lactococcus lactis malolactic enzyme and the Schizosaccharomyces pombe malate permease under the control of yeast promoters. The expression level of mae1 greatly influences the kinetics of the reaction by controlling the rate of malate uptake meanwhile a high expression level of mleS induces a partial consumption of malate derived from glucose by the malolactic enzyme. A strain expressing several copies of mae1 and one copy of mleS degrades 3 g/l of malate almost exclusively through the malolactic pathway in 4 days under enological conditions, without metabolic side effects.
Bony
M
M
Lallemand S.A. Complexe scientifique de Rangueil, Hall Biotechnologie III, Toulouse, France.
Bidart
F
F
Camarasa
C
C
Ansanay
V
V
Dulau
L
L
Barre
P
P
Dequin
S
S
D001426:Bacterial Proteins; D001692:Biological Transport; D005285:Fermentation; D015870:Gene Expression; D007700:Kinetics; D007773:Lactates / Q000378:metabolism; D008291:Malate Dehydrogenase / Q000235:genetics / Q000378:metabolism*; D008293:Malates / Q000378:metabolism*; D026901:Membrane Transport Proteins / Q000235:genetics / Q000378:metabolism*; D027361:Organic Anion Transporters; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
D001426:Bacterial Proteins; D007773:Lactates; D008293:Malates; D026901:Membrane Transport Proteins; D027361:Organic Anion Transporters; C098940:malate permease protein, Bacteria; C037731:malolactic enzyme; D008291:Malate Dehydrogenase