Electronic structure of the tyrosine D radical and the water-splitting complex from pulsed ENDOR spectroscopy on photosystem II single crystals
文献信息
Christian Teutloff, Susanne Pudollek, Sven Keßen, Matthias Broser, Athina Zouni, Robert Bittl
Pulsed electron nuclear double resonance (ENDOR) spectroscopy at Q- and W-band frequencies was applied to single crystals of photosystem II from Th. elongatus. W-Band 1H-ENDOR on the dark-stable radical state Y˙D of the redox-active tyrosine residue YD yields a complete mapping of the electronic structure of this amino acid radical in terms of an assignment of all hyperfine coupling tensors of the protons covalently bound to the side chain. This study can serve as a model case for the potential of high-field/high-frequency ENDOR on protein single crystals for obtaining highly resolved electronic structure information. Q-band 55Mn-ENDOR was applied to the S2oxidation state of the water-splitting complex in photosystem II single crystals. Irrespective of the difficulties arising from the extremely broad electron paramagnetic resonance (EPR) spectroscopy (≈200 mT) and ENDOR (≈100 MHz) spectra a tentative assignment of the Mn ion in the formal oxidation state III to a Mn position in the structural model of PSII is possible on the basis of the ENDOR data.
期刊推荐

Journal of Asian Natural Products Research

Journal of Chemical Sciences

Bioorganic & Medicinal Chemistry

Biocatalysis and Biotransformation

Topics in Catalysis

Medicinal Chemistry Research

Herald of the Russian Academy of Sciences

Critical Reviews in Solid State and Materials Sciences

NDT & E International

Journal of the Indian Institute of Science
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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.




