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Mechanism-Guided Discovery of an Esterase Scaffold with Promiscuous Amidase Activity
KTH, School of Biotechnology (BIO), Proteomics and Nanobiotechnology.
KTH, School of Biotechnology (BIO), Proteomics and Nanobiotechnology.
KTH, School of Biotechnology (BIO), Proteomics and Nanobiotechnology.
2016 (English)In: CATALYSTS, ISSN 2073-4344, Vol. 6, no 6, 90Article in journal (Refereed) PublishedText
Abstract [en]

The discovery and generation of biocatalysts with extended catalytic versatilities are of immense relevance in both chemistry and biotechnology. An enhanced atomistic understanding of enzyme promiscuity, a mechanism through which living systems acquire novel catalytic functions and specificities by evolution, would thus be of central interest. Using esterase-catalyzed amide bond hydrolysis as a model system, we pursued a simplistic in silico discovery program aiming for the identification of enzymes with an internal backbone hydrogen bond acceptor that could act as a reaction specificity shifter in hydrolytic enzymes. Focusing on stabilization of the rate limiting transition state of nitrogen inversion, our mechanism-guided approach predicted that the acyl hydrolase patatin of the alpha/beta phospholipase fold would display reaction promiscuity. Experimental analysis confirmed previously unknown high amidase over esterase activity displayed by the first described esterase machinery with a protein backbone hydrogen bond acceptor to the reacting NH-group of amides. The present work highlights the importance of a fundamental understanding of enzymatic reactions and its potential for predicting enzyme scaffolds displaying alternative chemistries amenable to further evolution by enzyme engineering.

Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 6, no 6, 90
Keyword [en]
enzyme promiscuity, enzyme catalysis, biocatalysis, reaction mechanisms, molecular modeling, amidase, esterase
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-189936DOI: 10.3390/catal6060090ISI: 000378839100015ScopusID: 2-s2.0-84975302338OAI: oai:DiVA.org:kth-189936DiVA: diva2:950210
Note

QC 20160728

Available from: 2016-07-28 Created: 2016-07-25 Last updated: 2016-07-28Bibliographically approved

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Kurten, CharlotteCarlberg, BengtSyren, Per-Olof
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