Peroxide oxidation of indole to oxindole by chloroperoxidase catalysis

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Peroxide oxidation of indole to oxindole by chloroperoxidase catalysis.

In the presence of chloroperoxidase, indole was oxidized by H2O2 to give oxindole as the major product. Under most conditions oxindole was the only product formed, and under optimal conditions the conversion was quantitative. This reaction displayed maximal activity at pH 4.6, although appreciable activity was observed throughout the entire pH range investigated, namely pH 2.5-6.0. Enzyme satur...

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Conversion of indole to oxindole under methanogenic conditions.

When indole was incubated under methanogenic conditions with an inoculum of sewage sludge, the chemical was metabolized with 10 days and temporary formation of an intermediate was observed. The metabolite was isolated by thin-layer chromatography and determined to be 1,3-dihydro-2H-indol-2one (oxindole) by UV spectroscopy (lambdaMAX, 247 nm) and mass spectrometry (m/z, 133). The methane produce...

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Singlet oxygen production by chloroperoxidase-hydrogen peroxide-halide systems.

Singlet oxygen production in the chloroperoxidase-hydrogen peroxide-halide system was studied using 1268 nm chemiluminescence. With chloride or bromide ions, singlet oxygen is produced by the mechanism (formula; see text) (formula; see text) where X- is chloride or bromide ion. Under conditions where there is high enzyme activity and when Reaction B is fast relative to Reaction A, singlet oxyge...

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ژورنال

عنوان ژورنال: Biochemical Journal

سال: 1979

ISSN: 0264-6021

DOI: 10.1042/bj1830269