Accurate and effective calculation of amide proton magnetic shieldings in a calcium binding peptide
Literature Information
Caterina Benzi, Maurizio Cossi, Vincenzo Barone
NMR amide proton chemical shifts of the calcium complex with the bicyclic nonapeptide BCP2, cyclo-(Glu1–Ala2–Pro3–Gly4–Lys5–Ala6–Pro7–Gly8)-cyclo-(1γ → 5ε)Gly9 were calculated by means of Hartree–Fock and DFT methods within the GIAO framework. Calculated results yielded a good agreement with experimental data: computed chemical shifts well reproduced the strong changes induced by the presence of the metal. The nature of the metal–peptide interaction, as well as other non-local effects on magnetic shielding, were discussed. Further, different hybrid methods have been tested to set up an affordable approach to study magnetic properties in metal–protein complexes.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.













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