Search Results - "Dioumaev, Andrei K."

Light-Driven Na+ Pump from Gillisia limnaea: A High-Affinity Na+ Binding Site Is Formed Transiently in the Photocycle by Balashov, Sergei P., Imasheva, Eleonora S., Dioumaev, Andrei K., Wang, Jennifer M., Jung, Kwang-Hwan, Lanyi, Janos K.

“…A group of microbial retinal proteins most closely related to the proton pump xanthorhodopsin has a novel sequence motif and a novel function. Instead of, or…”
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Photocycle of Exiguobacterium sibiricum Rhodopsin Characterized by Low-Temperature Trapping in the IR and Time-Resolved Studies in the Visible by Dioumaev, Andrei K, Petrovskaya, Lada E, Wang, Jennifer M, Balashov, Sergei P, Dolgikh, Dmitriy A, Kirpichnikov, Mikhail P, Lanyi, Janos K

“…The photocycle of the retinal protein from Exiguobacterium sibiricum, which differs from bacteriorhodopsin in both its primary donor and acceptor, is…”
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Proton Transfers in the Photochemical Reaction Cycle of Proteorhodopsin by Dioumaev, Andrei K, Brown, Leonid S, Shih, Jennifer, Spudich, Elena N, Spudich, John L, Lanyi, Janos K

“…The spectral and photochemical properties of proteorhodopsin (PR) were determined to compare its proton transport steps to those of bacteriorhodopsin (BR)…”
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Two Bathointermediates of the Bacteriorhodopsin Photocycle, from Time-Resolved Nanosecond Spectra in the Visible by Dioumaev, Andrei K, Lanyi, Janos K

“…Time-resolved measurements were performed on wild-type bacteriorhodopsin with an optical multichannel analyzer in the spectral range 350−735 nm, from 100 ns to…”
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Bacteriorhodopsin photocycle at cryogenic temperatures reveals distributed barriers of conformational substates by Dioumaev, Andrei K, Lanyi, Janos K

“…The time course of thermal reactions after illumination of 100% humidified bacteriorhodopsin films was followed with FTIR spectroscopy between 125 and 195 K…”
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Infrared Monitoring of Interlayer Water in Stacks of Purple Membranes by Dioumaev, Andrei K., Lanyi, Janos K

“…The thermodynamic behavior of films of hydrated purple membranes from Halobacterium salinarum and the water confined in it was studied by Fourier transform…”
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Existence of a Proton Transfer Chain in Bacteriorhodopsin:  Participation of Glu-194 in the Release of Protons to the Extracellular Surface by Dioumaev, Andrei K, Richter, Hans-Thomas, Brown, Leonid S, Tanio, Michikazu, Tuzi, Satoru, Saitô, Hazime, Kimura, Yoshiaki, Needleman, Richard, Lanyi, Janos K

“…Glu-194 near the extracellular surface of bacteriorhodopsin is indispensable for proton release to the medium upon protonation of Asp-85 during light-driven…”
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Selectivity of Retinal Photoisomerization in Proteorhodopsin Is Controlled by Aspartic Acid 227 by Imasheva, Eleonora S, Balashov, Sergei P, Wang, Jennifer M, Dioumaev, Andrei K, Lanyi, Janos K

“…Similarly to bacteriorhodopsin, proteorhodopsin that normally contains all-trans and 13-cis retinal is transformed at low pH to a species containing 9-cis…”
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Coupling of the Reisomerization of the Retinal, Proton Uptake, and Reprotonation of Asp-96 in the N Photointermediate of Bacteriorhodopsin by Dioumaev, Andrei K, Brown, Leonid S, Needleman, Richard, Lanyi, Janos K

“…In the N to O reaction of the bacteriorhodopsin photocycle, Asp-96 is protonated from the cytoplasmic surface, and coupled to this, the retinal isomerizes from…”
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Fourier Transform Infrared Spectra of a Late Intermediate of the Bacteriorhodopsin Photocycle Suggest Transient Protonation of Asp-212 by Dioumaev, Andrei K, Brown, Leonid S, Needleman, Richard, Lanyi, Janos K

“…We measured time-resolved difference spectra, in the visible and the infrared, for the Glu-194 and Glu-204 mutants of bacteriorhodopsin and detected an…”
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Breaking the carboxyl rule: lysine 96 facilitates reprotonation of the Schiff base in the photocycle of a retinal protein from Exiguobacterium sibiricum by Balashov, Sergei P, Petrovskaya, Lada E, Imasheva, Eleonora S, Lukashev, Evgeniy P, Dioumaev, Andrei K, Wang, Jennifer M, Sychev, Sergey V, Dolgikh, Dmitriy A, Rubin, Andrei B, Kirpichnikov, Mikhail P, Lanyi, Janos K

“…A lysine instead of the usual carboxyl group is in place of the internal proton donor to the retinal Schiff base in the light-driven proton pump of…”
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Two Bathointermediates of the Bacteriorhodopsin Photocycle, Distinguished by Nanosecond Time-Resolved FTIR Spectroscopy at Room Temperature by Dioumaev, Andrei K, Braiman, Mark S

“…FTIR step-scan spectroscopy with 10 ns nominal time resolution was applied to the early stages of the photocycle of bacteriorhodopsin at room temperature…”
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Partitioning of Free Energy Gain between the Photoisomerized Retinal and the Protein in Bacteriorhodopsin by Dioumaev, Andrei K, Brown, Leonid S, Needleman, Richard, Lanyi, Janos K

“…Photoisomerization of the all-trans-retinal of bacteriorhodopsin to 13-cis,15-anti initiates a sequence of thermal reactions in which relaxation of the polyene…”
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Low-Temperature FTIR Study of Multiple K Intermediates in the Photocycles of Bacteriorhodopsin and Xanthorhodopsin by Dioumaev, Andrei K, Wang, Jennifer M, Lanyi, Janos K

“…Low-temperature FTIR spectroscopy of bacteriorhodopsin and xanthorhodopsin was used to elucidate the number of K-like bathochromic states, their sequence, and…”
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Switch from Conventional to Distributed Kinetics in the Bacteriorhodopsin Photocycle by Dioumaev, Andrei K, Lanyi, Janos K

“…Below 195 K, the bacteriorhodopsin photocycle could not be adequately described with exponential kinetics [Dioumaev, A. K., and Lanyi, J. K. (2007) Proc. Natl…”
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Proton Transport by Proteorhodopsin Requires that the Retinal Schiff Base Counterion Asp-97 Be Anionic by Dioumaev, Andrei K, Wang, Jennifer M, Bálint, Zoltán, Váró, György, Lanyi, Janos K

“…At pH >7, proteorhodopsin functions as an outward-directed proton pump in cell membranes, and Asp-97 and Glu-108, the homologues of the Asp-85 and Asp-96 in…”
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Evaluation of intrinsic chemical kinetics and transient product spectra from time-resolved spectroscopic data by Dioumaev, Andrei K.

“…This communication is devoted to the evaluation of true spectra and intrinsic (microscopic) rate constants from apparent kinetics measured in time-resolved…”
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Local-Access Model for Proton Transfer in Bacteriorhodopsin by Brown, Leonid S, Dioumaev, Andrei K, Needleman, Richard, Lanyi, Janos K

“…The accessibility of the retinal Schiff base in bacteriorhodopsin was studied in the D85N/D96N mutant where the proton acceptor and donor are absent…”
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Modeling Vibrational Spectra of Amino Acid Side Chains in Proteins: The Carbonyl Stretch Frequency of Buried Carboxylic Residues by Dioumaev, Andrei K, Braiman, Mark S

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Nano- and Microsecond Time-Resolved FTIR Spectroscopy of the Halorhodopsin Photocycle by Dioumaev, Andrei K., Braiman, Mark S.

“…— Step‐scan Fourier transform infrared spectroscopy with 50 ns time resolution was applied to the early stages of the photocycle of halorhodopsin (hR) for the…”
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