ArticleProceedings of the National Academy of Sciences of the United States of America2007
15N photochemically induced dynamic nuclear polarization magic-angle spinning NMR analysis of the electron donor of photosystem II.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed, 72 citations in OpenAlex.
- Dynamic nuclear polarization and chemically induced hyperpolarization: Progress, mechanisms, and opportunities.Magnetic resonance letters · 2025Review
- Mechanism of Solid-StateThe journal of physical chemistry letters · 2024Article
- Light-InducedJournal of the American Chemical Society · 2024Article
- Magic Angle Spinning Solid-StateThe journal of physical chemistry letters · 2024Article
- Electronic Structures of Radical-Pair-Forming Cofactors in a Heliobacterial Reaction Center.Molecules (Basel, Switzerland) · 2024Article
- Optically Enhanced Solid-StateJournal of the American Chemical Society · 2023Article
- Spin Hyperpolarization in Modern Magnetic Resonance.Chemical reviews · 2023Review
- Photo-CIDNP in Solid State.Applied magnetic resonance · 2022Review
- Article
- Photochemically induced dynamic nuclear polarization NMR on photosystem II: donor cofactor observed in entire plant.Scientific reports · 2018Article
- Article
- Article
- Solid-state NMR applied to photosynthetic light-harvesting complexes.Photosynthesis research · 2012Review
- N Photo-CIDNP MAS NMR To Reveal Functional Heterogeneity in Electron Donor of Different Plant Organisms.Applied magnetic resonance · 2012Article
- Observation of the solid-state photo-CIDNP effect in entire cells of cyanobacteria Synechocystis.Photosynthesis research · 2010Article
- Action Spectroscopy on Dense Samples of Photosynthetic Reaction Centers of Rhodobacter sphaeroides WT Based on Nanosecond Laser-Flash C Photo-CIDNP MAS NMR.Applied magnetic resonance · 2010Article
- The electronic structure of the primary electron donor of reaction centers of purple bacteria at atomic resolution as observed by photo-CIDNP 13C NMR.Proceedings of the National Academy of Sciences of the United States of America · 2009Article
- Dynamic nuclear polarization at high magnetic fields.The Journal of chemical physics · 2008Review
- Magic Angle Spinning (MAS) NMR: a new tool to study the spatial and electronic structure of photosynthetic complexes.Photosynthesis researchReview
- The solid-state photo-CIDNP effect.Photosynthesis researchArticle
Corrections and comments
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Authors and funding
9 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In natural photosynthesis, the two photosystems that operate in series to drive electron transport from water to carbon dioxide are quite similar in structure and function, but operate at widely different potentials. In both systems photochemistry begins by photo-oxidation of a chlorophyll a, but that in photosystem II (PS2) has a 0.7 eV higher midpoint potential than that in photosystem I (PS1), so their electronic structures must be very different. Using reaction centers from (15)N-labeled spinach, these electronic structures are compared by their photochemically induced dynamic nuclear polarization (photo-CIDNP) in magic-angle spinning (MAS) NMR measurements. The results show that the electron spin distribution in PS1, apart from its known delocalization over 2 chlorophyll molecules, reveals no marked disturbance, whereas the pattern of electron spin density distribution in PS2 is inverted in the oxidized radical state. A model for the donor of PS2 is presented explaining the inversion of electron spin density based on a tilt of the axial histidine toward pyrrole ring IV causing pi-pi overlap of both aromatic systems.
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