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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A new route to L-threo-3-[4-(methylthio)phenylserine], a key intermediate for the synthesis of antibiotics: recombinant low-specificity D-threonine aldolase-catalyzed stereospecific resolution.

A new enzymatic resolution process was established for the production of L-threo-3-[4-(methylthio)phenylserine] (MTPS), an intermediate for synthesis of antibiotics, florfenicol and thiamphenicol, using the recombinant low-specificity D-threonine aldolase from Arthrobacter sp. DK-38. Chemically synthesized DL-threo-MTPS was efficiently resolved with either the purified enzyme or the intact recombinant Escherichia coli cells overproducing the enzyme. Under the optimized experimental conditions, 100 mM (22.8 g l-1) L-threo-MTPS was obtained from 200 mM (45.5 g l-1) DL-threo-MTPS, with a molar yield of 50% and a 99.6% enantiomeric excess.[1]


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