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Strategies for Improving Enzymes for Efficient Biocatalysis

Marek Adamczak1 and Sajja Hari Krishna2*

1Chair of Food Biotechnology, University of Warmia and Mazury in Olsztyn, PL-10 718 Olsztyn, Poland
2Department of Chemistry and Center for Fundamental and Applied Molecular Evolution, Emory University, Atlanta, GA-30 322, USA

Article history:
Received August 9, 2004
Accepted November 22, 2004

Key words:
biocatalysis, biocatalyst engineering, directed evolution, enzyme, medium engineering

Summary:
Biocatalytic processes are finding increasingly widespread application not only in academia, but also in industry. This is particularly true in the pharmaceutical and agrochemical industries where the need for optically pure molecules is critical. Biocatalysis is also receiving a major thrust from the generation of new and novel biocatalysts via microbial screening, developments in the biocatalytic processes themselves (e.g. use of nonaqueous solvents for synthetic purposes) and improvements in the activation of the enzymes by numerous mechanisms (solvent and enzyme modifications), including protein engineering. The most dramatic results have been achieved by targeting the gene encoding a particular enzyme in order to undertake protein engineering by rational and non-rational methods. This review discusses various means of improving enzyme properties or creating new activities.



*Corresponding author:     krishna70@yahoo.com
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