Water Structural Changes Involved in the Activation Process of Photoactive Yellow Protein†

Biochemistry ◽  
2000 ◽  
Vol 39 (27) ◽  
pp. 7902-7909 ◽  
Author(s):  
Hideki Kandori ◽  
Tatsuya Iwata ◽  
Johnny Hendriks ◽  
Akio Maeda ◽  
Klaas J. Hellingwerf
Keyword(s):  
Structural Changes ◽  
Photoactive Yellow Protein ◽  
Activation Process

scholarly journals Preparation and characterization of activated carbon from bio-diesel by-products (Jatropha seedcake) by steam activation

2012 ◽  
Vol 47 (3) ◽  
pp. 257-264
Author(s):  
MS Islam ◽  
MA Rouf ◽  
S Fujimoto ◽  
T Minowa
Keyword(s):  
Activated Carbon ◽  
Structural Changes ◽  
Pyrolysis Temperature ◽  
Hold Time ◽  
Raw Material ◽  
Bet Surface Area ◽  
Activation Process ◽  
Steam Activation ◽  
Activation Temperature ◽  
Ft Ir

Activated carbon was prepared using bio-diesel waste (Jatropha seedcake) by conventional carbonization followed by steam activation process on a laboratory scale. Preliminary tests were conducted to investigate the influences of different operating parameters, such as initial material size, pyrolysis temperature and hold time on the properties of pyrolized chars. To determine the optimum conditions for producing activated carbon, the effect of activation temperature and activation time have been studied. The maximum BET surface area of 613.43 m2/g and highest methylene blue adsorption capacity of 8.27 mg/g was obtained at a pyrolysis temperature of 600°C for hold time 1.5 hr followed by steam activation at a temperature of 800°C for a hold time of 1 hr. The produced activated carbon was almost like ash at 900°C. FT-IR and TG/DTA have been done in order to understand the structural changes during the process. The waste material was a suitable raw material for the production of good quality activated carbon. DOI: http://dx.doi.org/10.3329/bjsir.v47i3.13056 Bangladesh J. Sci. Ind. Res. 47(3), 257-264, 2012

Binding of Hydrogen-Citrate to Photoactive Yellow Protein Is Affected by the Structural Changes Related to Signaling State Formation

2012 ◽  
Vol 116 (44) ◽  
pp. 13172-13182 ◽  
Author(s):  
Marijke Hospes ◽  
Johannes H. Ippel ◽  
Rolf Boelens ◽  
Klaas J. Hellingwerf ◽  
Johnny Hendriks
Keyword(s):  
State Formation ◽  
Structural Changes ◽  
Photoactive Yellow Protein

scholarly journals Comparison of the Photochemical Reaction of Photoactive Yellow Protein in Crystal with Reaction in Solution1

2003 ◽  
Vol 17 (2-3) ◽  
pp. 345-353 ◽  
Author(s):  
Eriko Mano ◽  
Hironari Kamikubo ◽  
Yasushi Imamoto ◽  
Mikio Kataoka
Keyword(s):  
Photochemical Reaction ◽  
Structural Changes ◽  
Spectroscopic Studies ◽  
Crystalline Lattice ◽  
Photoactive Yellow Protein ◽  
X Ray ◽  
X Ray Crystallography ◽  
Solution Condition ◽  
Active Intermediate ◽  
Ectothiorhodospira Halophila

Photoactive yellow protein (PYP) is a photoreceptor protein for the negative phototaxis ofEctothiorhodospira halophila. The crystal structures of several photo‒intermediates have been revealed by X-ray crystallography. In the crystal structure of the active intermediate, PYPM, no significant structural changes were observed except for the vicinity of the chromophore. On the contrary, spectroscopic studies with solution condition demonstrated that global structural changes occur during the photo‒cycle. In order to reveal the origin of the discrepancies, we measured the reaction kinetics upon illumination under crystal condition and to compare them with those observed under solution condition. The reactive portion decreases with the increase of crystallinity. The rate constant of PYPMdecay also decreases with the increase of crystallinity. These results suggest two possibilities: (1) PYP in crystal does not react by the illumination; (2) the photoreaction rate is highly accelerated in crystal. Consequently, the photoreaction in crystal is considered to be highly influenced by the force constraint from crystalline lattice.

scholarly journals Chromophore Conformation and the Evolution of Tertiary Structural Changes in Photoactive Yellow Protein

Structure ◽  
2004 ◽  
Vol 12 (6) ◽  
pp. 1039-1045 ◽  
Author(s):  
Spencer Anderson ◽  
Vukica Srajer ◽  
Reinhard Pahl ◽  
Sudarshan Rajagopal ◽  
Friedrich Schotte ◽  
...  
Keyword(s):  
Structural Changes ◽  
Photoactive Yellow Protein

Water structural changes in the activation process of the LOV2 domain of Adiantum phytochrome3

2005 ◽  
Vol 735-736 ◽  
pp. 259-265 ◽  
Author(s):  
Dai Nozaki ◽  
Tatsuya Iwata ◽  
Satoru Tokutomi ◽  
Hideki Kandori
Keyword(s):  
Structural Changes ◽  
Activation Process

Photo-isomerization of the isolated photoactive yellow protein chromophore: What comes before the primary step?

2021 ◽  
Author(s):  
Cate S Anstöter ◽  
Basile Curchod ◽  
Jan RR Verlet
Keyword(s):  
Structural Changes ◽  
Biological Response ◽  
Photoactive Yellow Protein

Photoactive proteins typically rely on structural changes in a small chromophore to initiate a biological response. While these changes often involve isomerization as the “primary step”, preceding this is an...

scholarly journals Dynamics of Protein and Chromophore Structural Changes in the Photocycle of Photoactive Yellow Protein Monitored by Time-Resolved Optical Rotatory Dispersion†,‡

Biochemistry ◽  
2003 ◽  
Vol 42 (7) ◽  
pp. 2062-2071 ◽  
Author(s):  
Eefei Chen ◽  
Thomas Gensch ◽  
Andrew B. Gross ◽  
Johnny Hendriks ◽  
Klaas J. Hellingwerf ◽  
...  
Keyword(s):  
Structural Changes ◽  
Optical Rotatory Dispersion ◽  
Rotatory Dispersion ◽  
Photoactive Yellow Protein ◽  
Optical Rotatory ◽  
Time Resolved
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