Observations on the Proteolytic Enzyme of Bacillus Proteus. Studies in Bacterial Metabolism, XL

Kendall, Arthur Isaac; Walker, Arthur W.

doi:10.1093/infdis/17.3.442

Cited by 22 publications

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“…Inhibition of amino acid degradation (as judged by production of branched-chain acids) by glucose is thus not surprising. Inhibition of the proteolytic activity of microbes by carbohydrates was described in earlier publications (4,17). Except for M. elsdenii, carbohydrate was necessary for growth, and the levels used did not inhibit ammonia production by a number of ruminal organisms (6).…”

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confidence: 86%

Production of branched-chain volatile fatty acids by certain anaerobic bacteria

Allison¹

1978

Appl Environ Microbiol

171

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Net production of isobutyric acid, isovaleric acid, and 2-methylbutyric acid by cultures of Bacteroides ruminicola and Megasphaera elsdenii on media that contained Trypticase or casein hydrolysate continued (up to 5 days) after growth had ceased. Only trace quantities of these acids were produced in a medium that contained a mixture of amino acids that did not include the branched-chain amino acids. M. elsdenii produced increased quantities of the branched-chain fatty acids in a medium that contained Trypticase when glucose was reduced or eliminated from the culture medium. However, B. ruminicola produced increased quantities of branched-chain fatty acids and of phenylacetic acid from Trypticase when glucose was supplied at 3 mg/ml rather than at 1 mg/ml. Single strains of Streptococcus bovis, Selenomonas ruminantium, Bacteroides amylophilus, and Butyrivibrio fibrisolvens did not produce branched-chain fatty acids.

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Section: Downloaded Frommentioning

confidence: 86%

Production of branched-chain volatile fatty acids by certain anaerobic bacteria

Allison¹

1978

Appl Environ Microbiol

171

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“…Glenn (1911) concluded from a series of experiments that the failure of bacteria to liquefy gelatin was due to the acidity developed in media containing carbohydrates. Kendall and Walker (1915) found that a bacteria-free filtrate of a plain broth culture of P. vulgaris would liquefy gelatin in the presence of glucose as readily as in its absence. They concluded that the proteolytic enzyme was not produced in cultures in glucose media and that the glucose was fermented first, thus "sparing" the protein of the medium.…”

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confidence: 99%

Certain Phases of Nitrogenous Metabolism in Bacterial Cultures

Bord

1923

J Bacteriol

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“…In the present experiments, it was found that proteolytic activity was affected by both tannin and sugar fractions of carob extract, as well as by gabotannic acid and sucrose. Sugars are known to inhibit proteolytic activity of microorganisms (Berman and Rettger, 1918;Kendall and Walker, 1915). Small quantities of sugars, however, encourage protein biosynthesis of rumen microorganisms (Arias et al, 1951;Lewis, 1957;Phillipson, Dobson, and Blackburn, 1959).…”

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confidence: 99%

Effect of Carob Pod Extract on Cellulolysis, Proteolysis, Deamination, and Protein Biosynthesis in an Artificial Rumen1

Tagari¹,

Henis²,

Tamir³

et al. 1965

Applied Microbiology

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Effect of carob pod extract on cellulolysis, proteolysis, deamination, and protein biosynthesis in an artificial rumen. Appl. Microbiol. 13:437-442. 1965.-Carob pod extract and its tannin and sugar fractions were compared with gallotannic acid and sucrose for their effect on the cellulolytic, proteolytic, protein biosynthetic, and deaminative activities of rumen microorganisms. The inhibitory effects of carob pod extract upon the cellulolysis and deamination were correlated mainly with its sugar, rather than its tannin components. On the other hand, proteolytic activity and protein biosynthesis were more significantly affected by the tannin fraction. In contrast to the tannin fraction of carob pod extract, gallotannic acid inhibited cellulolytic activity. The harmful effect of a low concentration of tannins on protein biosynthesis could be prevented by the addition of carbohydrates to the reaction mixture. At high tannin concentration (40 jug/ml), however, the addition of carbohydrates did not prevent the inhibition.

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Observations on the Proteolytic Enzyme of Bacillus Proteus. Studies in Bacterial Metabolism, XL

Cited by 22 publications

References 0 publications

Production of branched-chain volatile fatty acids by certain anaerobic bacteria

Production of branched-chain volatile fatty acids by certain anaerobic bacteria

Certain Phases of Nitrogenous Metabolism in Bacterial Cultures

Effect of Carob Pod Extract on Cellulolysis, Proteolysis, Deamination, and Protein Biosynthesis in an Artificial Rumen1

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