FEBS Lett. 2001 Jun 15;499(1-2):41-4.

In situ analysis of methylglyoxal metabolism in Saccharomyces cerevisiae.

Martins AM, Cordeiro CA, Ponces Freire AM.

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Grupo de Enzimologia, Centro de Estudos de Bioquímica e Fisiologia, and Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, 1749-016, Lisbon, Portugal.

Abstract

Methylglyoxal metabolism was studied during Saccharomyces cerevisiae grown with D-glucose as the sole carbon and energy source. Using for the first time a specific assay for methylglyoxal in yeast, metabolic fluxes of its formation and D-lactate production were determined. D-Glucose consumption and ethanol production were determined during growth. Metabolic fluxes were also determined in situ, at the glycolytic triose phosphate levels and glyoxalase pathway. Maximum fluxes of ethanol production and glucose consumption correspond to maxima of methylglyoxal and D-lactate formation fluxes during growth. Methylglyoxal formation is quantitatively related to glycolysis, representing 0.3% of the total glycolytic flux in S. cerevisiae.

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In situ analysis of methylglyoxal metabolism in Saccharomyces cerevisiae.

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