ArticleBiophysical journal2009
Femtosecond carotenoid to retinal energy transfer in xanthorhodopsin.
Article in Biophysical journal, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed, 62 citations in OpenAlex.
- Vibronic Reorganization Suppresses Salinixanthin-to-Retinal Energy Transfer in the Freshwater Kin4B8 Xanthorhodopsin.The journal of physical chemistry letters · 2026Article
- Protonation-Enhanced Energy Transfer in Xanthorhodopsin Kin4B8.The journal of physical chemistry letters · 2025Article
- Structural and spectroscopic basis of excitation energy transfer in microbial rhodopsins binding xanthophylls.Chemical science · 2025Article
- Retinal to Retinal Energy Transfer in a Bistable Microbial Rhodopsin Dimer.Journal of the American Chemical Society · 2025Article
- Expression of Xanthorhodopsin in Escherichia coli.The protein journal · 2023Article
- Article
- Diversity, Mechanism, and Optogenetic Application of Light-Driven Ion Pump Rhodopsins.Advances in experimental medicine and biology · 2021Review
- Electronic Couplings and Electrostatic Interactions Behind the Light Absorption of Retinal Proteins.Frontiers in molecular biosciences · 2021Review
- RubyACRs, nonalgal anion channelrhodopsins with highly red-shifted absorption.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Twisting a β-Carotene, an Adaptive Trick from Nature for Dissipating Energy during Photoprotection.The Journal of biological chemistry · 2017Article
- Evaluating the Nature of So-Called S*-State Feature in Transient Absorption of Carotenoids in Light-Harvesting Complex 2 (LH2) from Purple Photosynthetic Bacteria.The journal of physical chemistry. B · 2016Article
- Wavelength-dependent photocycle activity of xanthorhodopsin in the visible region.Biochemistry and biophysics reports · 2016Article
- Explaining the temperature dependence of spirilloxanthin's S* signal by an inhomogeneous ground state model.The journal of physical chemistry. A · 2013Article
- Carotenoid response to retinal excitation and photoisomerization dynamics in xanthorhodopsin.Chemical physics letters · 2011Article
- Removal and reconstitution of the carotenoid antenna of xanthorhodopsin.The Journal of membrane biology · 2011Article
- Reconstitution of gloeobacter rhodopsin with echinenone: role of the 4-keto group.Biochemistry · 2010Article
- Molecular factors controlling photosynthetic light harvesting by carotenoids.Accounts of chemical research · 2010Article
- Reconstitution of Gloeobacter violaceus rhodopsin with a light-harvesting carotenoid antenna.Biochemistry · 2009Article
- Xanthorhodopsin: a bacteriorhodopsin-like proton pump with a carotenoid antenna.Biochimica et biophysica actaArticle
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
Abstract
Xanthorhodopsin of the extremely halophilic bacterium Salinibacter ruber represents a novel antenna system. It consists of a carbonyl carotenoid, salinixanthin, bound to a retinal protein that serves as a light-driven transmembrane proton pump similar to bacteriorhodopsin of archaea. Here we apply the femtosecond transient absorption technique to reveal the excited-state dynamics of salinixanthin both in solution and in xanthorhodopsin. The results not only disclose extremely fast energy transfer rates and pathways, they also reveal effects of the binding site on the excited-state properties of the carotenoid. We compared the excited-state dynamics of salinixanthin in xanthorhodopsin and in NaBH(4)-treated xanthorhodopsin. The NaBH(4) treatment prevents energy transfer without perturbing the carotenoid binding site, and allows observation of changes in salinixanthin excited-state dynamics related to specific binding. The S(1) lifetimes of salinixanthin in untreated and NaBH(4)-treated xanthorhodopsin were identical (3 ps), confirming the absence of the S(1)-mediated energy transfer. The kinetics of salinixanthin S(2) decay probed in the near-infrared region demonstrated a change of the S(2) lifetime from 66 fs in untreated xanthorhodopsin to 110 fs in the NaBH(4)-treated protein. This corresponds to a salinixanthin-retinal energy transfer time of 165 fs and an efficiency of 40%. In addition, binding of salinixanthin to xanthorhodopsin increases the population of the S(*) state that decays in 6 ps predominantly to the ground state, but a small fraction (<10%) of the S(*) state generates a triplet state.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.