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• W2983443042 abstract "Abstract Lipases are interfacially activated enzymes that catalyze the hydrolysis of ester bonds and constitute prime candidates for industrial and biotechnological applications ranging from detergent industry, to chiral organic synthesis. As a result, there is an incentive to understand the mechanisms underlying lipase activity at the molecular level, so as to be able to design new lipase variants with tailor-made functionalities. Our understanding of lipase function primarily relies on bulk assay averaging the behavior of a high number of enzymes masking structural dynamics and functional heterogeneities. Recent advances in single molecule techniques based on fluorogenic substrate analogues revealed the existence of lipase functional states, and furthermore so how they are remodeled by regulatory cues. Single particle studies of lipases on the other hand directly observed diffusional heterogeneities and suggested lipases to operate in two different modes. Here to decipher how mutations in the lid region controls Thermomyces lanuginosus lipase (TLL) diffusion and function we employed a Single Particle Tracking (SPT) assay to directly observe the spatiotemporal localization of TLL and rationally designed mutants on native substrate surfaces. Parallel imaging of thousands of individual TLL enzymes and HMM analysis allowed us to observe and quantify the diffusion, abundance and microscopic transition rates between three linearly interconverting diffusional states for each lipase. We proposed a model that correlate diffusion with function that allowed us to predict that lipase regulation, via mutations in lid region or product inhibition, primarily operates via biasing transitions to the active states." @default.
• W2983443042 created "2019-11-22" @default.
• W2983443042 creator A5005193049 @default.
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• W2983443042 date "2019-11-07" @default.
• W2983443042 modified "2023-10-18" @default.
• W2983443042 title "Direct observation of Thermomyces lanuginosus lipase diffusional states by Single Particle Tracking and their remodeling by mutations and inhibition" @default.
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• W2983443042 doi "https://doi.org/10.1038/s41598-019-52539-1" @default.
• W2983443042 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6838188" @default.
• W2983443042 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31700110" @default.
• W2983443042 hasPublicationYear "2019" @default.
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