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• W4385405966 abstract "Exploring the structures and spectral features of proteins with advanced quantum chemical methods is an uphill task. In this work, a fragment-based molecular tailoring approach (MTA) is appraised for the CAM-B3LYP/aug-cc-pVDZ-level geometry optimization and vibrational infrared (IR) spectra calculation of ten real proteins containing up to 407 atoms and 6617 basis functions. The use of MTA and the inherently parallel nature of the fragment calculations enables a rapid and accurate calculation of the IR spectrum. The applicability of MTA to optimize the protein geometry and evaluate its IR spectrum employing a polarizable continuum model with water as a solvent is also showcased. The typical errors in the total energy and IR frequencies computed by MTA vis-à-vis their full calculation (FC) counterparts for the studied protein are 5-10 millihartrees and 5 cm-1, respectively. Moreover, due to the independent execution of the fragments, large-scale parallelization can also be achieved. With increasing size and level of theory, MTA shows an appreciable advantage in computer time as well as memory and disk space requirement over the corresponding FCs. The present study suggests that the geometry optimization and IR computations on the biomolecules containing ∼1000 atoms and/or ∼15 000 basis functions using MTA and HPC facility can be clearly envisioned in the near future." @default.
• W4385405966 created "2023-08-01" @default.
• W4385405966 creator A5009856050 @default.
• W4385405966 creator A5013723871 @default.
• W4385405966 creator A5061764087 @default.
• W4385405966 date "2023-07-28" @default.
• W4385405966 modified "2023-10-02" @default.
• W4385405966 title "Combining fragmentation method and high-performance computing: Geometry optimization and vibrational spectra of proteins" @default.
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• W4385405966 doi "https://doi.org/10.1063/5.0149572" @default.
• W4385405966 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37522406" @default.

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