Results 101 to 110 of about 6,418 (224)

Watching a signaling protein function: What has been learned over four decades of time-resolved studies of photoactive yellow protein

Structural Dynamics
Photoactive yellow protein (PYP) is a signaling protein whose internal p-coumaric acid chromophore undergoes reversible, light-induced trans-to-cis isomerization, which triggers a sequence of structural changes that ultimately lead to a signaling state ...
Friedrich Schotte, Hyun Sun Cho, Fred Dyda, Philip Anfinrud   +3 more
doaj   +1 more source

Siberian hamsters that fail to reentrain to the photocycle have suppressed melatonin levels

, 2000
Siberian hamsters readily reentrain to a 3-h phase delay of the photocycle (16 h light/day) but fail to reentrain to a 5-h phase delay. This study tested whether melatonin production was suppressed in animals that failed to reentrain.
Norman F. Ruby, Margarita L. Dubocovich, H. Craig Heller   +2 more
core   +1 more source

Tailoring of organic dyes with oxidoreductive compounds to obtain photocyclic radical generator systems exhibiting photocatalytic behavior

Beilstein Journal of Organic Chemistry, 2014
The combination of a dye which absorbs the photon, an electron acceptor and an electron donor leading to energy conversion through electron transfer, was the basis of the so called three-component systems.
Christian Ley, Julien Christmann, Ahmad Ibrahim, Luciano H. Di Stefano, Xavier Allonas   +4 more
doaj   +1 more source

In vivo absorption spectra of the two stable states of the Euglena photoreceptor photocycle

, 2009
Euglena gracilis possesses a simple but sophisticated light detecting system, consisting of an eyespot formed by carotenoids globules and a photoreceptor. The photoreceptor of Euglena is characterized by optical bistability, with two stable states.
Passarelli V, Gualtieri P, Barsanti L, Vesentini N, Coltelli P, Evangelista V, Santoro F, Frassanito AM   +7 more
core   +1 more source

pH dependence of the protein orientation in self-assembled bacteriorhodopsin/polycation multilayer films

International Journal of Photoenergy, 2000
Bacteriorhodopsin (bR) multilayer films were successfully prepared by alternatingdepositions of cationic poly(diallyldimethylammonium chloride) (PDAC) polyelectrolyte and purple membrane (PM).
Tapio Jussila, Meiling Li, Nikolai V. Tkachenko, Sinikka Parkkinen, Baofang Li, Long Jiang, Helge Lemmetyinen   +6 more
doaj   +1 more source

Proton transfers in the bacteriorhodopsin photocycle

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2006
The steps in the mechanism of proton transport in bacteriorhodopsin include examples for most kinds of proton transfer reactions that might occur in a transmembrane pump: proton transfer via a bridging water molecule, coupled protonation/deprotonation of two buried groups separated by a considerable distance, long-range proton migration over a hydrogen-
openaire   +2 more sources

Probing Specific Molecular Processes and Intermediates by Time-Resolved Fourier Transform Infrared Spectroscopy: Application to the Bacteriorhodopsin Photocycle

, 2016
We present a general approach for probing the kinetics of specific molecular processes in proteins by time-resolved Fourier transform infrared (IR) spectroscopy. Using bacteriorhodopsin (bR) as a model we demonstrate that by appropriately monitoring some
Hideki Kandori (1235541), Esteve Padrós (1328733), Víctor A. Lórenz-Fonfría (1657483)   +2 more
core   +1 more source

Effects on AsLOV2 side chains during the photocycle.

, 2014
(A) Side chain positions in the chromophore binding pocket in the dark and light state crystal structures [32] (B) Chemical processes that occur to the FMN chromophore during the photocycle.
Josiah P. Zayner (515207), Tobin R. Sosnick (181042)   +1 more
core   +1 more source

A short history of structure based research on the photocycle of photoactive yellow protein

Structural Dynamics, 2017
The goals of time-resolved macromolecular crystallography are to extract the molecular structures of the reaction intermediates and the reaction dynamics from time-resolved X-ray data alone.
Marius Schmidt
doaj   +1 more source

Regulation of Photocycle Kinetics of Photoactive Yellow Protein by Modulating Flexibility of the β‑Turn

, 2020
The role of the significant flexibility of the β-turn in photoactive yellow protein (PYP) due to Gly115 was studied. G115A and G115P mutations were observed to accelerate the photocycle and shift the equilibrium between the late photocycle intermediate ...
Yasushi Imamoto (817077), Mikio Kataoka (445951), Hiroaki Sasayama (8458470), Miki Harigai (2485252), Yuji Furutani (633791)   +4 more
core   +1 more source