Article
Ω-Loop mutations control dynamics of the active site by modulating the hydrogen-bonding network in PDC-3 β-lactamase.
eLife - 21 Jan 2026
Chen Shuang, Mack Andrew R, Hujer Andrea M, Bethel Christopher R, Bonomo Robert A, Haider Shozeb
Abstract excerpt
The expression of antibiotic-inactivating enzymes, such as Pseudomonas-derived cephalosporinase-3 (PDC-3), is a major mechanism of intrinsic resistance in bacteria. Using reinforcement learning-driven molecular dynamics simulations and constant pH MD, we investigate how clinically observed mutations in the Ω-loop (at residues V211, G214, E219, and Y221) alter the structure and function of PDC-3. Our findings...
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