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Appl. Environ. Microbiol., Aug 1995, 3180-3184, Vol 61, No. 8
Copyright © 1995, American Society for Microbiology

3-Methylindole (skatole) and indole production by mixed populations of pig fecal bacteria

MT Jensen, RP Cox and BB Jensen
Department of Animal Physiology and Biochemistry, Danish Institute of Animal Science, Tjele.

Pig fecal slurries converted added L-tryptophan either to indole without detectable intermediates or to 3-methylindole (skatole) via indole-3-acetate. The initial rate of production of 3-methylindole was greatest at pH 6.5 and less at pH 5.0 and 8.0; the initial rates of indole production were similar at pH 6.5 and 8.0. More than 80% of the tryptophan added was converted to 3-methylindole at pH 5.0; at pH 8.0 85% was converted to indole. Both pathways had similar Km values for tryptophan and similar maximum rates. Indole-3-carbinol and indole-3- acetonitrile completely inhibited the production of 3-methylindole from indole-3-acetate but had no effect on the reactions involving L- tryptophan.


This article has been cited by other articles:

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