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Construction of a Tailor-Made L (2S,3S)-Butanediol Dehydrogenase by Exchanging Domains Between Native Structural Analogs

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The development of a stable L-BDH chimera was attempted by exchanging whole domains between two native structural analogs, L-BDH and meso-BDH, because the S-configuration specificity of L-BDH is valuable from the standpoint of its application but its activity is unstable, whereas meso-BDH is stable. The domain chimeras obtained indicated that the leaf-like structures constituting three domains were likely to be mainly associated with chiral recognition, and the fourth domain, the basic domain, is likely to be mainly associated with enzyme stability. A combination of the leaf domains of L-BDH and the basic domain of meso-BDH attained a sufficient level of practical use as an artificial L-BDH chimera, because the resulting enzyme had both stability and S-configuration specificity. However, the levels of stability and specificity were slightly lower than those of the respective enzymes from which they were derived.

Keywords: 2,3-butanediol; BDH Gene; BDH enzymes; Chimeric L-BDH; Chiral compounds; Domains; E. coli JM109; Mutagenesis; Native Structural Analogs; S-configuration; Structural chimeras; butanediol dehydrogenase; domain chimera; fermentation; liquid crystals; plasmid; primer; short-chain dehydrogenase/reductase family; stereoisomers; stereospecificity; tailor-made enzyme

Document Type: Research Article


Publication date: August 1, 2011

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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