Journal
CHEMBIOCHEM
Volume 7, Issue 3, Pages 478-484Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.200500430
Keywords
biosynthesis; biotransformations; broad specificity; oxidoreductases; polyketide synthase
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Recombinant ketoreductose (KR) domains derived from antibiotic-producing modular polyketide synthases (PKSs) have been examined as potential catalysts for the enantioselective reduction of non-polyketide substrates. KR domains from two modular PKSs show significant activity toward alternative substrates, particularly those that incorporate cyclohexyl moieties. Through site-directed mutagenesis of the amino acid motifs previously implicated in stereocontrol by KRs, we hove identified mutants with improved activity toward such compounds. These results suggest that PKS KRs could potentially be used as biotransformation catalysts for the production of chiral alcohols.
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