Characterization and role of the branched-chain aminotransferase (BcaT) isolated from Lactococcus lactis subsp. cremoris NCDO 763

Article Abstract:

Results demonstrate that branched-chain aminotransferase from Lactococcus lactis subsp. cremoris NCDO 763 is active under cheese-ripening conditions and imparts flavor to cheese. Data further show that the enzyme is a homodimer and exhibits aminotransferase activity.

Statistical Data Included, Testing, Production processes, Dairy industry, Dairy products industry, Branched chain amino acids, Aminotransferases, Gram-positive bacteria, Transaminases

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CodY-regulated aminotransferases AraT and BcaT play a major role in the growth of Lactococcus lactis in milk by regulating the intracellular pool of amino acids

Article Abstract:

Research has been conducted on Lactococcus lactis growth in milk. The authors have demonstrated that double inactivation of aminotransferases AraT and BcaT, isolated from L. lactis, reduce L. lactis growth in milk.

Analysis, Environmental aspects, Microbial growth, Microbiology, Genetic regulation, Microbial populations, Amino acids, Microbial ecology

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Glutamate dehydrogenase activity can be transmitted naturally to Lactococcus lactis strains to stimulate amino acid conversion to aroma compounds

Article Abstract:

Glutamate dehydrogenase activity that catalyzes the reversible glutamate deamination to small letter alpha-ketoglutarate was detected in Lactococcus lactis strains isolated from a vegetal source was studied. The study shows that although the gdh gene of L. lactis encodes a GDD mainly active in glutamate biosynthesis, it is responsible for the capacity of L. lactis strains to catabolize amino acids to aroma compounds.

Glutamate, Oxidoreductases

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