ArticleProceedings of the National Academy of Sciences of the United States of America2009
The electronic structure of the primary electron donor of reaction centers of purple bacteria at atomic resolution as observed by photo-CIDNP 13C NMR.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed.
- High-frequency dynamic nuclear polarization in rotating solids.Science advances · 2026Review
- 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
- Red Shift in the Absorption Spectrum of Phototropin LOV1 upon the Formation of a Semiquinone Radical: Reconstructing the Orbital Architecture.The journal of physical chemistry. B · 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
- Photo-CIDNP in Solid State.Applied magnetic resonance · 2022Review
- Tailored flavoproteins acting as light-driven spin machines pump nuclear hyperpolarization.Scientific reports · 2020Article
- Nuclear spin-hyperpolarization generated in a flavoprotein under illumination: experimental field-dependence and theoretical level crossing analysis.Scientific reports · 2019Article
- Studying hydrogen bonding and dynamics of the acetylate groups of the Special Pair of Rhodobacter sphaeroides WT.Scientific reports · 2019Article
- Article
- Photoprotection in intact cells of photosynthetic bacteria: quenching of bacteriochlorophyll fluorescence by carotenoid triplets.Photosynthesis research · 2018Article
- Energy utilization in fluctuating biological energy converters.Structural dynamics (Melville, N.Y.) · 2016Article
- 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
- Polarizing agents and mechanisms for high-field dynamic nuclear polarization of frozen dielectric solids.Solid state nuclear magnetic resonance · 2011Review
- Observation of the solid-state photo-CIDNP effect in entire cells of cyanobacteria Synechocystis.Photosynthesis research · 2010Article
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Authors and funding
7 authors.
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Abstract
Composed of the two bacteriochlorophyll cofactors, P(L) and P(M), the special pair functions as the primary electron donor in bacterial reaction centers of purple bacteria of Rhodobacter sphaeroides. Under light absorption, an electron is transferred to a bacteriopheophytin and a radical pair is produced. The occurrence of the radical pair is linked to the production of enhanced nuclear polarization called photochemically induced dynamic nuclear polarization (photo-CIDNP). This effect can be used to study the electronic structure of the special pair at atomic resolution by detection of the strongly enhanced nuclear polarization with laser-flash photo-CIDNP magic-angle spinning NMR on the carotenoid-less mutant R26. In the electronic ground state, P(L) is strongly disturbed, carrying a slightly negative charge. In the radical cation state, the ratio of total electron spin densities between P(L) and P(M) is 2:1, although it is 2.5:1 for the pyrrole carbons, 2.2:1 for all porphyrinic carbons, and 4:1 for the pyrrole nitrogen. It is shown that the symmetry break between the electronic structures in the electronic ground state and in the radical cation state is an intrinsic property of the special pair supermolecule, which is particularly attributable to a modification of the structure of P(L). The significant difference in electron density distribution between the ground and radical cation states is explained by an electric polarization effect of the nearby histidine.
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