Nitrile hydrolysis by Rhodococcus erythropolis BL1, an acetonitrile-tolerant strain isolated from a marine sediment

Article Abstract:

Five physiologically different bacteria capable of hydrolysing organic nitriles are isolated from marine sediments off the coast of Denmark. One strain, Rhodococcus erythropolis BL1, shows a much higher tolerance towards acetonitrile than the other bacteria. The bacteria's tolerance for acetonitrile, which can be attributed to its cell-bound nitrile hydratase/amidase system, indicates its potential for use in synthesis or detoxification processes.

Marine sediments, Bacteriology

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Hydrolysis of the soft amphiphilic antimicrobial agent tetradecyl betainate is retarded after binding to and killing Salmonella typhimurium

Article Abstract:

The effects of binding of tetradecyl betainate to Salmonella typhimurium on the rate of hydrolysis is investigated. The hydrolysis rate was signifiant but retarded compared to tetradecyl betainate (B14) in solution. Hydrolysis of substance bound to S. typhimurium was increased in an alkaline environment and by heat, consistent with a model based on the insertion of amphiphilic QQCs into the bacterial outer membrane.

Salmonella typhimurium

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Methylosphaera hansonii gen. nov., sp. nov., a psychrophilic, group I methanotroph from Antarctic marine-salinity, meromictic lakes

Article Abstract:

Methanotrophs were reported present in water columns and sediments of marine-salinity Antarctic meromictic lakes and have an ecophysiology particularly well-suited to the lake habitats. Polyphasic taxonomic characteristics of the Antarctic lake isolates represented a novel group I methanotrophic genus with the proposed name Methylosphaera hansonii (type strain ACAM 549).

Methane, Composition, Methanobacteriaceae, Methanogens

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