Theoretical Study on the Mechanism of the Acylate Reaction of β-Lactamase.
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ABSTRACT: Using density functional theory and a cluster approach, we study the reaction potential surface and compute Gibbs free energies for the acylate reaction of β-lactamase with penicillin G, where the solvent effect is important and taken into consideration. Two reaction paths are investigated: one is a multi-step process with a rate-limit energy barrier of 19.1 kcal/mol, which is relatively small, and the reaction can easily occur; the other is a one-step process with a barrier of 45.0 kcal/mol, which is large and thus makes the reaction hard to occur. The reason why the two paths have different barriers is explained.
SUBMITTER: Wei WM
PROVIDER: S-EPMC8154126 | biostudies-literature |
REPOSITORIES: biostudies-literature
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