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L-malic acid production using immobilized Saccharomyces cerevisiae
Z M Figueiredo1, L B Carvalho Júnior
1Departamento de Bioquimica, Universidade Federal de Pernambuco, Recife, Brazil.
Applied Biochemistry and Biotechnology
|August 1, 1991
Summary
Immobilized Saccharomyces cerevisiae cells efficiently produced L-malate from fumarate. Pretreatment with malonate enhanced this biocatalytic process, avoiding succinate by-product formation.
Area of Science:
- Biotechnology and metabolic engineering.
- Enzyme immobilization and biocatalysis.
Background:
- L-Malate is a valuable organic acid with diverse industrial applications.
- Efficient biocatalytic production of L-malate from fumarate is an area of research interest.
- Previous studies reported succinate as a common by-product in microbial L-malate synthesis.
Purpose of the Study:
- To develop an efficient method for L-malate production using immobilized yeast cells.
- To investigate the effect of malonate pretreatment on the biocatalytic performance.
- To assess the formation of by-products during the L-malate synthesis.
Main Methods:
- Immobilization of Saccharomyces cerevisiae cells in polyacrylamide gel.
- Bioconversion of fumarate to L-malate using the immobilized cells.
- Optimization of reaction conditions, including malonate pretreatment.
Main Results:
- Immobilized Saccharomyces cerevisiae cells effectively catalyzed the conversion of fumarate to L-malate.
- Malonate pretreatment significantly improved the performance of the immobilized cell preparation.
- Succinate was not detected as a by-product under the described experimental conditions.
Conclusions:
- Malonate-pretreated, polyacrylamide-entrapped Saccharomyces cerevisiae cells offer a promising biocatalyst for L-malate production.
- This method provides a potentially cleaner route for L-malate synthesis compared to other microbial systems.
- Further optimization could lead to industrial-scale application of this biocatalytic process.