Modelling the spectroscopy and dynamics of plastocyanin
文献信息
David Robinson, Nicholas A. Besley
The electronic absorption, electronic circular dichroism and X-ray absorption spectroscopy of the blue copper protein plastocyanin is studied with density functional theory, time-dependent density functional theory and multireference configuration interaction in conjunction with classical molecular dynamics simulations. A strong correlation is observed between the excitation energy of the intense ligand to metal charge transfer band and the copper–cysteine sulfur bond length. The results suggest that the copper–cysteine sulfur bond length in the crystal structure of plastocyanin is too short and should be closer to the corresponding bond lengths in related blue copper proteins. Averaging over many structural conformations is required to reproduce the major features of the experimental circular dichroism spectra. A correlation between the rotational strength of the ligand to metal charge transfer band and the distortion of the copper atom from the plane of the cysteine sulfur and histidine nitrogen atoms is found. X-ray absorption calculations show a smaller sulfur p orbital character in the singly occupied molecular orbital of cucumber basic protein compared to plastocyanin.
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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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