Robust design and optimization of retroaldol enzymes.

TitleRobust design and optimization of retroaldol enzymes.
Publication TypeJournal Article
Year of Publication2012
AuthorsAlthoff, E. A., Wang L., Jiang L., Giger L., Lassila J. K., Wang Z., Smith M., Hari S., Kast P., Herschlag D., Hilvert D., & Baker D.
JournalProtein science : a publication of the Protein Society
Date Published2012 May
KeywordsAldehyde-Lyases, Catalytic Domain, Directed Molecular Evolution, Models, Molecular, Mutagenesis, Site-Directed, Primary Publication, Protein Engineering, Recombinant Proteins

Enzyme catalysts of a retroaldol reaction have been generated by computational design using a motif that combines a lysine in a nonpolar environment with water-mediated stabilization of the carbinolamine hydroxyl and β-hydroxyl groups. Here, we show that the design process is robust and repeatable, with 33 new active designs constructed on 13 different protein scaffold backbones. The initial activities are not high but are increased through site-directed mutagenesis and laboratory evolution. Mutational data highlight areas for improvement in design. Different designed catalysts give different borohydride-reduced reaction intermediates, suggesting a distribution of properties of the designed enzymes that may be further explored and exploited.


Alternate JournalProtein Sci.