Production, identification, and toxicity of gamma-decalactone and 4-hydroxydecanoic acid from Sporidiobolus spp

Article Abstract:

Sporidiobolus salmonicolor produces only the lactone form during the bioconversion of ricinoleic acid to gamma-decalactone, while Sporidiobolus ruinenii produces 4-hydroxydecanoic acid along with the lactone form. The difference in the production levels of the two species in the presence of high concentration of ricinoleic acid methyl ester is attributed to the high sensitivity of S. salmonicolor to the lactone and to the high level of 4-hydroxydecanoic acid produced by S. ruinenii. Toxicity testing shows that 4-hydroxydecanoate is less toxic for the two bacteria than gamma-decalactone.

Usage, Mass spectrometry, Gas chromatography, Fourier transform infrared spectroscopy, Lactones, Toxicity testing, In vitro tests, Toxicity tests

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Novel scheme for biosynthesis of aryl metabolites from L-phenylalanine in the fungus Bjerkandera adusta

Article Abstract:

Researchers report the first known case of a beta-oxidation sequence leading from phenylalanine to aryl metabolites in a white rot fungus. These fungi are able to produce natural aroma compounds for commercial use, such as vanillin, bitter almond, and cinnamaldehyde.

Essences and essential oils, Physiological aspects, Molds (Fungi), Organic compounds, Organic compound synthesis, Natural products

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Diversity of L-methionine catabolism pathways in chees-ripening bacteria

Article Abstract:

Researchers found no L-methionine deaminase activity in whole cells and cell extracts from five cheese-ripening bacteria they examined. Four contained L-methionine aminotransferase. There may be many different pathways for L-methionine metabolism in these bacteria.

Microbial metabolism, Methionine, Industrial microorganisms

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