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• W2912446381 endingPage "4118" @default.
• W2912446381 startingPage "4108" @default.
• W2912446381 abstract "Despite tremendous progress in understanding and engineering enzymes, knowledge of how enzyme structures and their dynamics induce observed catalytic properties is incomplete, and capabilities to engineer enzymes fall far short of industrial needs. Here, we investigate the structural and dynamic drivers of enzyme catalysis for the rate-limiting step of the industrially important enzyme ketol-acid reductoisomerase (KARI) and identify a region of the conformational space of the bound enzyme–substrate complex that, when populated, leads to large increases in reactivity. We apply computational statistical mechanical methods that implement transition interface sampling to simulate the kinetics of the reaction and combine this with machine learning techniques from artificial intelligence to select features relevant to reactivity and to build predictive models for reactive trajectories. We find that conformational descriptors alone, without the need for dynamic ones, are sufficient to predict reactivity with greater than 85% accuracy (90% AUC). Key descriptors distinguishing reactive from almost-reactive trajectories quantify substrate conformation, substrate bond polarization, and metal coordination geometry and suggest their role in promoting substrate reactivity. Moreover, trajectories constrained to visit a region of the reactant well, separated from the rest by a simple hyperplane defined by ten conformational parameters, show increases in computed reactivity by many orders of magnitude. This study provides evidence for the existence of reactivity promoting regions within the conformational space of the enzyme–substrate complex and develops methodology for identifying and validating these particularly reactive regions of phase space. We suggest that identification of reactivity promoting regions and re-engineering enzymes to preferentially populate them may lead to significant rate enhancements." @default.
• W2912446381 created "2019-02-21" @default.
• W2912446381 creator A5020577524 @default.
• W2912446381 creator A5024679659 @default.
• W2912446381 creator A5028186526 @default.
• W2912446381 date "2019-02-14" @default.
• W2912446381 modified "2023-10-16" @default.
• W2912446381 title "Machine Learning Identifies Chemical Characteristics That Promote Enzyme Catalysis" @default.
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• W2912446381 doi "https://doi.org/10.1021/jacs.8b13879" @default.
• W2912446381 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6407039" @default.
• W2912446381 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30761897" @default.
• W2912446381 hasPublicationYear "2019" @default.
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