Cited by 86Probiotics and Fermented FoodsMicrobial metabolism and enzyme functionFermentation and Sensory Analysis

Production of Volatile Fatty Acids by Some Lactic Acid Bacteria. II. Selective Formation of Volatile FattyAcids by Degradation of Amino Acids

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Nakae, T., Elliott, J.A.·1965·Journal of Dairy Science

Abstract

The kinds and amounts of volatile fatty acids (VFA) produced from single amino acids, modified amino acid mixtures, and pyruvate by resting cells of some streptococci and lactobacilli have been investigated.The effects of pit of substrate, temperature of incubation, and oxygen removal from substrate on VFA production from some selected amino acids were also studied.Two strains of lactic acid bacteria, S. diacetilactis DRC1 and Lactobacillus No. 138, produced acetate from alanine, glycine, or serine, propionate from threonine, isobutyrate from valine, and isovalerate or a valerate from leucine and isoleucine.These reactions may be ascribed mainly to oxidative deamination and decarboxylation.Optimum pH was at neutral or slightly alkaline range, and optimum temperature was 32 C for streptococci and 42 C for lactobacilli.The removal of oxygen from substrate brought about some changes of total and individual VFA produced from certain amino acids, although there was no reductive deamination.The VFA patterns from amino acid mixtures depended upon a qualitative and quantitative balance of the amino acids.Acetate production from pyruvate by strains DRC1 and No. 138 was also found.Some possible explanations of the mechanism of individual VFA production from amino acids are discussed.

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  1. [1]1. BARKEa, H. A. 1961. Fermentation of Nitrogenous Compounds. The Bacteria. Vol. II, p. 153. Academic Press, New York.
  2. [3]3. GUNSALUS, I. C. 1954. Mechanism of En- zyme Action. p. 545. Johns Hopkins Press, Baltimore.

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Authors
Nakae, T., & Elliott, J. A.
Affiliations
Agriculture and Agri-Food Canada (CA)
Venue
Journal of Dairy Science
Published
1965-03
Volume
48
Issue
3
Pages
293-299
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2001608973
Cited by
86
References
13
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 2
FWCI
14.75
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial metabolism and enzyme function
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Fermentation and Sensory Analysis
Keywords
volatile fatty acids, lactic acid bacteria, Streptococcus diacetilactis, Lactobacillus, amino acid catabolism, acetate production, propionate, isobutyrate, isovalerate, oxidative deamination, decarboxylation, pyruvate, oxygen removal, incubation temperature, pH optimum, amino acid mixtures
MeSH terms
Amino Acids, Animals, Fatty Acids, Fatty Acids, Volatile, Lactobacillus, Research, Streptococcus, Lactic Acid, Lipid Metabolism

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