Acetaldehyde production by strains used as probiotics in fermented milk

Lactic acid bacteria have diverse shunts for the metabolism of acetaldehyde, which is involved in the metabolism of carbohydrates, proteins and nucleic acids. In Lactobacillus acidophilus and Lactobacillus casei, strains isolated from feces of healthy children, acetaldehyde can be formed from differ...

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Bibliographic Details
Published in:Journal of food protection 1994-05, Vol.57 (5), p.436-440
Main Authors: Gonzalez, S, Morata de Ambrosini, V, Manca de Nadra, M, Pesce de Ruiz Halgado, A, Oliver, G
Format: Article
Language:English
Subjects:
ACETALDEHIDO
ACETALDEHYDE
Biological and medical sciences
Food industries
Food microbiology
Fundamental and applied biological sciences. Psychology
Lactobacillus
LACTOBACILLUS ACIDOPHILUS
LACTOBACILLUS CASEI
LAIT FERMENTE
LECHE FERMENTADA
PROBIOTICOS
PROBIOTIQUE
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Summary:Lactic acid bacteria have diverse shunts for the metabolism of acetaldehyde, which is involved in the metabolism of carbohydrates, proteins and nucleic acids. In Lactobacillus acidophilus and Lactobacillus casei, strains isolated from feces of healthy children, acetaldehyde can be formed from different sources. Phosphotransacetilase, acetate kinase, aldehyde dehydrogenase and 2-deoxiriboaldolase activities were found in both strains. alpha-Carboxilase and threonine aldolase activities only occurred in L. acidophilus. In contrast, phosphoketolase activity was present in L. casei, but absent in the other strain studied. The accumulation of acetaldehyde in the growth medium is possible because the enzymes specific activities to form it are higher than those able to convert it to ethanol
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-57.5.436