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Stabilization of Nocardia EH1 epoxide hydrolase by immobilization

A partially purified epoxide hydrolase from Nocardia EH1 was stabilized by immobilization through ionic binding onto DEAE-cellulose. This biocatalyst showed more than twice the activity (225 %) of that of the free enzyme albeit at a marginal reduction in enantioselectivity. The addition of the nonio...

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Published in:Biotechnology letters 1998-04, Vol.20 (4), p.373-377
Main Authors: KROUTIL, W, ORRU, R. V. A, FABER, K
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ORRU, R. V. A
FABER, K
description A partially purified epoxide hydrolase from Nocardia EH1 was stabilized by immobilization through ionic binding onto DEAE-cellulose. This biocatalyst showed more than twice the activity (225 %) of that of the free enzyme albeit at a marginal reduction in enantioselectivity. The addition of the nonionic detergent Triton X-100 during the immobilization further enhanced the stability as indicated by a dramatic shift in the temperature optimum from 35 to 45°C. The stabilized immobilized biocatalyst could be successfully employed in repeated batch reactions (residual activity of 55% after five cycles), which was not the case for whole cell reactions (residual activity ≤10 %). © Rapid Science Ltd. 1998[PUBLICATION ABSTRACT]
doi_str_mv 10.1023/A:1005379314104
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subjects Binding sites
Biological and medical sciences
Biotechnology
Cellulose
Fundamental and applied biological sciences. Psychology
Immobilization of enzymes and other molecules
Immobilization techniques
Ions
Methods. Procedures. Technologies
Nocardia
title Stabilization of Nocardia EH1 epoxide hydrolase by immobilization
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