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• W2914441331 startingPage "877" @default.
• W2914441331 abstract "As a polyene antibiotic of great pharmaceutical significance, pimaricin has been extensively studied to enhance its productivity and effectiveness. In our previous studies, pre-reaction state (PRS) has been validated as one of the significant conformational categories before macrocyclization, and is critical to mutual recognition and catalytic preparation in thioesterase (TE)-catalyzed systems. In our study, molecular dynamics (MD) simulations were conducted on pimaricin TE-polyketide complex and PRS, as well as pre-organization state (POS), a molecular conformation possessing a pivotal intra-molecular hydrogen bond, were detected. Conformational transition between POS and PRS was observed in one of the simulations, and POS was calculated to be energetically more stable than PRS by 4.58 kcal/mol. The structural characteristics of PRS and POS-based hydrogen-bonding, and hydrophobic interactions were uncovered, and additional simulations were carried out to rationalize the functions of several key residues (Q29, M210, and R186). Binding energies, obtained from MM/PBSA calculations, were further decomposed to residues, in order to reveal their roles in product release. Our study advanced a comprehensive understanding of pimaricin TE-catalyzed macrocyclization from the perspectives of conformational change, protein-polyketide recognition, and product release, and provided potential residues for rational modification of pimaricin TE." @default.
• W2914441331 created "2019-02-21" @default.
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• W2914441331 date "2019-02-18" @default.
• W2914441331 modified "2023-10-16" @default.
• W2914441331 title "Insight into Structural Characteristics of Protein-Substrate Interaction in Pimaricin Thioesterase" @default.
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• W2914441331 doi "https://doi.org/10.3390/ijms20040877" @default.
• W2914441331 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6412417" @default.
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• W2914441331 hasPublicationYear "2019" @default.
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