Open AccessFunctional expression in Saccharomyces cerevisiae of the Lactococcus lactis mleS gene encoding the malolactic enzyme
Author(s) -
Denayrolles Muriel,
Aigle Michel,
LonvaudFunel Aline
Publication year - 1995
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1995.tb07332.x
Subject(s) - malolactic fermentation , lactococcus lactis , complementation , biology , yeast , fermentation , lactic acid , malic enzyme , biochemistry , malic acid , heterologous expression , saccharomyces cerevisiae , leuconostoc , bacteria , food science , gene , enzyme , recombinant dna , genetics , mutant , citric acid , dehydrogenase
Malolactic fermentation, a crucial step in winemaking, results mostly in degradation by lactic acid bacteria of L‐malic acid into L‐lactic acid. This direct decarboxylation is catalysed by the malolactic enzyme. Recently we, and others, have cloned the mleS gene of Lactococcus lactis encoding malolactic enzyme. Heterologous expression of mleS in Saccha‐romyces cerevisiae was tested to perform simultaneously alcoholic and malolactic fermentations by yeast. mleS gene was cloned in a yeast multicopy vector under a strong promoter. Malolactic activity was present in crude extracts of recombinant yeasts. Malic acid degradation was tested during alcoholic fermentation in synthetic media and must. Yeasts expressing the mleS gene actually produced L‐lactate from L‐malate; nevertheless malate degradation was far from complete.