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Expression of the Caldariomyces Fumago Chloroperoxidase in Aspergillus Niger and Characterization of the Recombinant Enzyme

Expression of the Caldariomyces Fumago Chloroperoxidase in Aspergillus Niger and Characterization of the Recombinant Enzyme

A Conesa, F van De Velde, F van Rantwijk, R A Sheldon, C A van Den Hondel, P J Punt

J Biol Chem. 2001 May 25;276(21):17635-40.

PMID: 11278701

Abstract:

The Caldariomyces fumago chloroperoxidase was successfully expressed in Aspergillus niger. The recombinant enzyme was produced in the culture medium as an active protein and could be purified by a three-step purification procedure. The catalytic behavior of recombinant chloroperoxidase (rCPO) was studied and compared with that of native CPO. The specific chlorination activity (47 units/nmol) of rCPO and its pH optimum (pH 2.75) were very similar to those of native CPO. rCPO catalyzes the oxidation of various substrates in comparable yields and selectivities to native CPO. Indole was oxidized to 2-oxindole with 99% selectivity and thioanisole to the corresponding R-sulfoxide (enantiomeric excess >98%). Incorporation of (18)O from labeled H(2)18O(2) into the oxidized products was 100% in both cases.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9055203	Chloroperoxidase from Caldariomyces fumago		9055-20-3	Price

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