Abstract
Comparative study of sulfoxidation activity of free and immobilized Rhodococcus rhodochrous IEGM 66 cells was performed. Free Rhodococcus cells (in the presence of 0.1 vol % n-hexadecane) displayed maximal oxidative activity towards thioanisole (0.5 g/l), a prochiral organic sulfide, added after 48-h cultivation of bacterial cells. Higher sulfide concentrations inhibited sulfoxidation activity of Rhodococcus. Use of immobilized cells allowed the 2-day preparatory stage to be omitted and a complete thioanisole bioconversion to be achieved in 24 h in the case that biocatalyst and 0.5 g/l thioanisole were added simultaneously. The biocatalyst immobilized on gel provides for complete thioanisole transformation into (S)-thioanisole sulfoxide (optical purity of 82.1%) at high (1.0–1.5 g/l) concentrations of sulfide substrate.
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Original Russian Text © A.A. El’kin, V.V. Grishko, I.B. Ivshina, 2010, published in Prikladnaya Biokhimiya i Mikrobiologiya, 2010, Vol. 46, No. 6, pp. 637–643.
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El’kin, A.A., Grishko, V.V. & Ivshina, I.B. Oxidative biotransformation of thioanisole by Rhodococcus rhodochrous IEGM 66 cells. Appl Biochem Microbiol 46, 586–591 (2010). https://doi.org/10.1134/S0003683810060050
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DOI: https://doi.org/10.1134/S0003683810060050