The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.
Dielectric Asymmetry in the Photosynthetic Reaction Center
Abstract
Although the three-dimensional structure of the bacterial photosynthetic reaction center (RC) reveals a high level of structural symmetry, with two nearly equivalent potential electron transfer pathways, the RC is functionally asymmetric: Electron transfer occurs along only one of the two possible pathways. In order to determine the origins of this symmetry breaking, the internal electric field present in the RC when charge is separated onto structurally characterized sites was probed by using absorption band shifts of the chromophores within the RC. The sensitivity of each probe chromophore to an electric field was calibrated by measuring the Stark effect spectrum, the change in absorption due to an externally applied electric field. A quantitative comparison of the observed absorption band shifts and those predicted from vacuum electrostatics gives information on the effective dielectric constant of the protein complex. These results reveal a significant asymmetry in the effective dielectric strength of the protein complex along the two potential electron transfer pathways, with a substantially higher dielectric strength along the functional pathway. This dielectric asymmetry could be a dominant factor in determining the functional asymmetry of electron transfer in the RC.
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How Proteins Trigger Excitation Energy Transfer in the FMO Complex of Green Sulfur Bacteria
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Quantum coherence in photosynthesis for efficient solar-energy conversion
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Energy Conversion in Natural and Artificial Photosynthesis
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Quantum design of photosynthesis for bio-inspired solar-energy conversion
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Probing Protein Electrostatics with a Synthetic Fluorescent Amino Acid
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Self-citation
Metadata
- Authors
- Steffen, M. A., Lao, K., & Boxer, S. G.
- Venue
- Science
- Published
- 1994-05-06
- Volume
- 264
- Issue
- 5160
- Pages
- 810-816
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2051397621
- Cited by
- 278
- References
- 21
- FWCI
- 4.29
- Type
- journal article
- Language
- en
- Open access
- closed
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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