Results 51 to 60 of about 6,418 (224)

Photoacoustic spectroscopy of bacteriorhodopsin photocycle

Biophysical Journal, 1983
Photoacoustic spectroscopy was applied to study the energetics and the kinetics of the slow intermediates of the bacteriorhodopsin photocycle. An analysis of the modulation frequency dependence of the photoacoustic signal allowed us to estimate the enthalpy changes and the kinetic parameters associated with those intermediates.
Renard, M., Thirion, P., Delmelle, M.
openaire   +2 more sources

Photochemistry of CryB from Rhodobacter sphaeroides

Photochemistry and Photobiology, EarlyView.
Elucidation of the photochemistry of CryB from Rhodobacter sphaeroides was achieved from the nanosecond to second timescale. A fast (<5 ns) deprotonation of the terminal electron donor Trp338 and the involvement of Tyr337 in photoreduction have been revealed.
Christopher Einholz, Johannes Ruhnke, Jonas Diez, Andreas Günter, Johannes Berger, Stefan Weber, Erik Schleicher   +6 more
wiley   +1 more source

Voltage dependence of proton pumping by bacteriorhodopsin mutants with altered lifetime of the m intermediate [PDF]

, 2013
The light-driven proton pump bacteriorhodopsin (BR) from Halobacterium salinarum is tightly regulated by the [H+] gradient and transmembrane potential.
Friedrich, Thomas, Éva Lörinczi, Sven Geibel, Thomas Friedrich, Geibel, Sven, Bamberg, Ernst, Lörinczi, Èva, Ernst Bamberg, Lörinczi Èva, Friedrich, T., Bamberg Ernst, Geibel, S., Friedrich Thomas, Geibel Sven, Bamberg, E., Lörinczi, E.   +15 more
core   +2 more sources

Theoretical investigation of the photocycle dynamics of the Archaerhodopsin 3 based fluorescent voltage sensor Archon2

, 2023
Previously the retinal photocycle dynamics of the fluorescent voltage sensor Archon2, a mutant of Arch-aerhodopsin 3, in pH 8 Tris buffer was studied experimentally at room temperature by photo-excitation (exci-tation wavelengths 590 nm and 632.8 nm) of ...
Silapetere, Arita, Penzkofer, Alfons, Hegemann, Peter   +2 more
core   +1 more source

The Magnetic Compass of Birds: The Role of Cryptochrome

Frontiers in Physiology, 2021
The geomagnetic field provides directional information for birds. The avian magnetic compass is an inclination compass that uses not the polarity of the magnetic field but the axial course of the field lines and their inclination in space.
Roswitha Wiltschko, Christine Nießner, Wolfgang Wiltschko   +2 more
doaj   +1 more source

Saturating mutagenesis on the Ser118 residue responsible for the spectral tuning mechanism of the orange/green‐reversible cyanobacteriochrome AM1_1499g1

Plant Biology, EarlyView.
This graphical abstract illustrates our systematic site‐saturation mutagenesis at the Ser118 position of the AM1_1499g1 GAF domain. By replacing this single residue, we generated a diverse array of variants with distinct spectral properties, demonstrating the remarkable molecular plasticity of cyanobacteriochromes and their customizability for ...
A. Yoneda, T. Suzuki, R. Narikawa
wiley   +1 more source

Indication for a Radical Intermediate Preceding the Signaling State in the LOV Domain Photocycle

, 2011
Bauer C, Rabl C-R, Heberle J, Kottke T. Indication for a Radical Intermediate Preceding the Signaling State in the LOV Domain Photocycle. PHOTOCHEMISTRY AND PHOTOBIOLOGY.
Kottke, Tilman ; https://orcid.org/, Rabl, Carl-Roland, Heberle, Joachim, Bauer, Christian, Carl-Roland Rabl, Christian Bauer, Tilman Kottke, Joachim Heberle   +7 more
core   +1 more source

The dark recovery rate in the photocycle of the bacterial photoreceptor YtvA is affected by the cellular environment and by hydration. [PDF]

PLoS ONE, 2014
We report thermal recovery kinetics of the lit state into the parental dark state, measured for the blue light-sensing photoreceptor YtvA inside overexpressing E. coli and B.
Francesca Pennacchietti, Stefania Abbruzzetti, Aba Losi, Carmen Mandalari, Roberta Bedotti, Cristiano Viappiani, Francesca Cella Zanacchi, Alberto Diaspro, Wolfgang Gärtner   +8 more
doaj   +1 more source

NAD replenishment restores mitochondrial function and thermogenesis in the brown adipose tissue of mice with obesity

The Journal of Physiology, EarlyView.
Abstract figure legend A high‐fat diet (HFD) induces brown adipose tissue (BAT) whitening, mitochondrial dysfunction (damaged cristae, fragmentation), reduced NAD+ levels and impaired thermogenesis, leading to lower energy expenditure and metabolic inflexibility.
Renata R. Braga, Matheus B. Rocha, Ana P. Morelli, Raul G. da Costa, Marcelo A. S. Mori, Adelino S. R. da Silva, José R. Pauli, Dennys E. Cintra, Eduardo R. Ropelle   +8 more
wiley   +1 more source

The effect of plasmon silver and exiton semiconductor nanoparticles on the bacteriorhodopsin photocycle in Halobacterium salinarum membranes

, 2017
International audienceThe interaction of semiconductor quantum dots and silver nanoparticles (AgNPs) with bacteriorhodopsin (BR), a membrane protein contained in the purple membrane (PM) of Halobacterium salinarum, is studied. It is shown that both types
E. P. Lukashev, I. Nabiev, Solovyeva, D., A. A. Chistyakov, Zaitsev, S. Yu., Mochalov, K., Chistyakov, A., K. E. Mochalov, D. O. Solovyeva, Oleinikov, V., Nabiev, I., V. A. Oleinikov, Lukashev, E., S. Yu. Zaitsev   +13 more
core   +1 more source