Results 11 to 20 of about 6,418 (224)

Photocycle of Cyanobacteriochrome TePixJ [PDF]

Biochemistry, 2020
Abstract Due to the recent advances in X-ray free electron laser techniques, bilin-containing cyanobacteriochrome photoreceptors have become prime targets for the ever-expanding field of time-resolved structural biology. However, to facilitate these challenging studies, it is essential that the time scales of any structural changes ...
Samantha J. O. Hardman, Derren J. Heyes, Igor V. Sazanovich, Nigel S. Scrutton   +3 more
openaire   +5 more sources

A Multi-Scale–Multi-Stable Model for the Rhodopsin Photocycle

Molecules, 2014
We report a multi-scale simulation study of the photocycle of the rhodopsins. The quasi-atomistic representation (“united atoms” UA) of retinal is combined with a minimalist coarse grained (CG, one-bead-per amino acid) representation of the protein, in a
Francesco Tavanti, Valentina Tozzini
doaj   +2 more sources

Confinement in crystal lattice alters entire photocycle pathway of the Photoactive Yellow Protein

Nature Communications, 2020
Protein structural dynamics can be studied by time-resolved crystallography (TRC) and ultrafast transient spectroscopic methods. Here, the authors perform electronic and vibrational transient absorption measurements to characterise the full photocycle of
Patrick E. Konold, Enis Arik, Jörn Weißenborn, Jos C. Arents, Klaas J. Hellingwerf, Ivo H. M. van Stokkum, John T. M. Kennis, Marie Louise Groot   +7 more
doaj   +2 more sources

‘Seeing’ the electromagnetic spectrum: spotlight on the cryptochrome photocycle

Frontiers in Plant Science
Cryptochromes are widely dispersed flavoprotein photoreceptors that regulate numerous developmental responses to light in plants, as well as to stress and entrainment of the circadian clock in animals and humans.
Blanche Aguida, Jonathan Babo, Soria Baouz, Nathalie Jourdan, Maria Procopio, Mohamed A. El-Esawi, Dorothy Engle, Stephen Mills, Stephan Wenkel, Alexander Huck, Kirstine Berg-Sørensen, Sotirios C. Kampranis, Justin Link, Margaret Ahmad, Margaret Ahmad   +14 more
doaj   +2 more sources

Up to 16% Optical Carbon-13 Hyperpolarization of Donor-Acceptor Molecules at 14.1 T. [PDF]

Angew Chem Int Ed Engl
Up to 16% 13C nuclear polarization is achieved using a rationally designed photo‐CIDNP polarizing agent (PA) in magic‐angle‐spinning NMR experiments at 14.1 T. The PA was designed using a combination of theoretical photocycle calculations and magnetic field dependent experiments to identify important new design principles.
Levien M, Visegrádi M, Karthikeyan G, Casano G, Reiter C, Wegner S, Purea A, Wasielewski MR, De Biasi F, Ouari O, Emsley L.   +10 more
europepmc   +3 more sources

Multiple Photocycles of Channelrhodopsin [PDF]

Biophysical Journal, 2005
Two rhodopsins with intrinsic ion conductance have been identified recently in Chlamydomonas reinhardtii. They were named "channelrhodopsins" ChR1 and ChR2. Both were expressed in Xenopus laevis oocytes, and their properties were studied qualitatively by two electrode voltage clamp techniques. ChR1 is specific for H+, whereas ChR2 conducts Na+, K+, Ca2+
Hegemann, Peter, Ehlenbeck, S., Gradmann, D.   +2 more
openaire   +3 more sources

Photocycles of Channelrhodopsin‐2 [PDF]

Photochemistry and Photobiology, 2009
AbstractRecent developments have used light‐activated channels or transporters to modulate neuronal activity. One such genetically‐encoded modulator of activity, channelrhodopsin‐2 (ChR2), depolarizes neurons in response to blue light. In this work, we first conducted electrophysiological studies of the photokinetics of hippocampal cells expressing ...
K Nikolic, N Grossman, MS Grubb, J Burrone, C Toumazou, Patrick Degenaar   +5 more
openaire   +3 more sources

Effect of lipid bilayer properties on the photocycle of green proteorhodopsin [PDF]

, 2015
The significance of specific lipids for proton pumping by the bacterial rhodopsin proteorhodopsin (pR) was studied. To this end, it was examined whether pR preferentially binds certain lipids and whether molecular properties of the lipid environment ...
von Ballmoos, Christoph, Mäler, Lena,, Ariöz, Candan, Mäler, Lena, Lindholm, Ljubica,, Ariöz, Candan,, Barth, Andreas, Liebau, Jobst,, Jawurek, Michael,, Barth, Andreas,, Wieslander, \uc5ke, von Ballmoos, Christopher, Wieslander, Åke,, Jawurek, Michael, Liebau, Jobst, von Ballmoos, Christoph,, Lindholm, Ljubica, Wieslander, Åke, M\ue4ler, Lena, Ari\uf6z, Candan   +19 more
core   +5 more sources

Effect of Hydrated Ionic Liquid on Photocycle and Dynamics of Photoactive Yellow Protein

Molecules, 2021
The mechanism by which proteins are solvated in hydrated ionic liquids remains an open question. Herein, the photoexcitation dynamics of photoactive yellow protein dissolved in hydrated choline dihydrogen phosphate (Hy[ch][dhp]) were studied by transient
Utana Umezaki, Miu Hatakenaka, Kana Onodera, Hiroto Mizutani, Suhyang Kim, Yusuke Nakasone, Masahide Terazima, Yoshifumi Kimura   +7 more
doaj   +1 more source

Biological Significance of Photoreceptor Photocycle Length: VIVID Photocycle Governs the Dynamic VIVID-White Collar Complex Pool Mediating Photo-adaptation and Response to Changes in Light Intensity. [PDF]

PLoS Genetics, 2015
Most organisms on earth sense light through the use of chromophore-bearing photoreceptive proteins with distinct and characteristic photocycle lengths, yet the biological significance of this adduct decay length is neither understood nor has been tested.
Arko Dasgupta, Chen-Hui Chen, ChangHwan Lee, Amy S Gladfelter, Jay C Dunlap, Jennifer J Loros   +5 more
doaj   +1 more source