The abstract is read at the publisher; the summary is JClub's.
A second-generation CUDA PME-CpHMD implementation in Amber increases throughput 1.5–2× across protein systems of 45–1,338 residues while keeping CpHMD overhead to 12–18% versus conventional MD.
- Why it matters: Proton-coupled conformational dynamics are computationally expensive with continuous constant-pH methods, limiting routine use and reliable sampling in all-atom simulations.
- What they did: The authors implemented CpHMD nonbonded corrections in a separate CUDA kernel and added native asynchronous pH replica exchange in pmemd.cuda.MPI, then derived titration parameters for Asp, Glu, His, Cys, Tyr, and Lys for CHARMM c22/CMAP, Amber ff14sb, and ff19sb.
- The result: Validation via pKa calculations showed force-field-specific limitations in hen egg white lysozyme, including a 20 pKa downshift for H15 and sensitivity in the E35/D52 dyad, while pH-REX PME-CpHMD demonstrated robustness and sampling efficiency.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.