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Stereodivergent Evolution of Artificial Enzymes for the Michael Reaction
Author(s) -
Garrabou Xavier,
Macdonald Duncan Stuart,
Wicky Basile I. M.,
Hilvert Donald
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201712554
Subject(s) - nucleophile , stereoselectivity , artificial enzyme , carbanion , directed evolution , selectivity , michael reaction , aldolase a , chemistry , ketone , enzyme , combinatorial chemistry , catalysis , stereochemistry , organic chemistry , gene , biochemistry , mutant
Enzymes are valuable biocatalysts for asymmetric synthesis due to their exacting stereocontrol. Changing the selectivity of an existing catalyst for new applications is, however, challenging. Here we show that, in contrast, the stereoselectivity of an artificial enzyme created by design and directed evolution is readily tunable. We engineered a promiscuous artificial retro‐aldolase into four stereocomplementary catalysts for the Michael addition of a tertiary carbanion to an unsaturated ketone. Notably, this selectivity is also preserved with alternative Michael nucleophiles. Complete stereodiversification of other designer enzymes should similarly be possible by extension of these approaches.