Protective Effects of Bacterial Glyceroglycolipid M874B against Cell Death Caused by Exposure to Heat and Hydrogen Peroxide

概要

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It was revealed by bioassay using sodA and katA mutants of Bacillus subtilis that the bacterial monogalactosyldiacylglycerol M874B, previously characterized as an alkyl peroxyl radical scavenger, was also capable of protecting cells from death caused by heating and exogenous H_2O_2. Chemical assays using the Fenton reaction and xanthine-xanthine oxidase revealed that M874B could quench hydroxyl radicals but not superoxide anions. Wheat monogalactosyldiacylglycerol, but neither digalactosyldiacylglycerol nor synthetic diacylglycerol, also had the same activities as those of M874B, although it was less efficient than M874B. These results suggest that monogalactosyldiacylg carrier. The maximum ammonia oxidation rate was up to 55.6 gN/m^3/h within the aerobic region of the carrier under the following feed conditions : 100 mg/l of total organic compound, 55 mg/l of ammonium concentration and 48 mg/l of inorganic carbon.
社団法人日本生物工学会の論文
2000-04-25