Abstract
Random mutagenesis of Caldariomyces fumago was carried out to produce a chloroperoxidase (CPO) with enhanced activity in mixtures of aqueous buffers and organic cosolvents. A mutant CPO with a 3.4-fold increased activity in 40% aqueous tert-butyl alcohol was obtained.A CPO-surfactant conjugate, prepared by colyophilisation, mediated the oxidation of thioanisole to its (R)-sulfoxide by TBHP in water-saturated isooctane. Copolymerisation of CPO and a toluenediisocyanate prepolymer resulted in a stable preparation that mediated the oxidation of indole to 2-oxindole in a range of organic solvents. The highest yield was obtained in 1-octanol.
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