scholarly journals Reversible amorphization and the catalytically active state of crystalline Co3O4 during oxygen evolution

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Arno Bergmann ◽  
Elias Martinez-Moreno ◽  
Detre Teschner ◽  
Petko Chernev ◽  
Manuel Gliech ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Active State ◽  
Catalytically Active

Unified structural motifs of the catalytically active state of Co(oxyhydr)oxides during the electrochemical oxygen evolution reaction

2018 ◽  
Vol 1 (9) ◽  
pp. 711-719 ◽  
Author(s):  
Arno Bergmann ◽  
Travis E. Jones ◽  
Elias Martinez Moreno ◽  
Detre Teschner ◽  
Petko Chernev ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Active State ◽  
Structural Motifs ◽  
Catalytically Active ◽  
Electrochemical Oxygen

scholarly journals Changes in conformational equilibria regulate the activity of the Dcp2 decapping enzyme

2017 ◽  
Vol 114 (23) ◽  
pp. 6034-6039 ◽  
Author(s):  
Jan Philip Wurm ◽  
Iris Holdermann ◽  
Jan H. Overbeck ◽  
Philipp H. O. Mayer ◽  
Remco Sprangers
Keyword(s):  
Molecular Level ◽  
Structural Information ◽  
Active State ◽  
Transverse Relaxation ◽  
Activator Proteins ◽  
Regulatory Domains ◽  
Conformational Equilibria ◽  
Catalytically Active ◽  
Decapping Enzyme ◽  
Dynamic Equilibria

Crystal structures of enzymes are indispensable to understanding their mechanisms on a molecular level. It, however, remains challenging to determine which structures are adopted in solution, especially for dynamic complexes. Here, we study the bilobed decapping enzyme Dcp2 that removes the 5′ cap structure from eukaryotic mRNA and thereby efficiently terminates gene expression. The numerous Dcp2 structures can be grouped into six states where the domain orientation between the catalytic and regulatory domains significantly differs. Despite this wealth of structural information it is not possible to correlate these states with the catalytic cycle or the activity of the enzyme. Using methyl transverse relaxation-optimized NMR spectroscopy, we demonstrate that only three of the six domain orientations are present in solution, where Dcp2 adopts an open, a closed, or a catalytically active state. We show how mRNA substrate and the activator proteins Dcp1 and Edc1 influence the dynamic equilibria between these states and how this modulates catalytic activity. Importantly, the active state of the complex is only stably formed in the presence of both activators and the mRNA substrate or the m7GDP decapping product, which we rationalize based on a crystal structure of the Dcp1:Dcp2:Edc1:m7GDP complex. Interestingly, we find that the activating mechanisms in Dcp2 also result in a shift of the substrate specificity from bacterial to eukaryotic mRNA.

Sequential Electrodeposition of Bifunctional Catalytically Active Structures in MoO 3 /Ni–NiO Composite Electrocatalysts for Selective Hydrogen and Oxygen Evolution

2020 ◽  
Vol 32 (39) ◽  
pp. 2003414 ◽  
Author(s):  
Xiaopeng Li ◽  
Yang Wang ◽  
Jiajun Wang ◽  
Yumin Da ◽  
Jinfeng Zhang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Active Structures ◽  
Catalytically Active

scholarly journals Mechanistic insights into a NOx storage-reduction (NSR) catalyst by spatiotemporal operando X-ray absorption spectroscopy

2019 ◽  
Vol 9 (5) ◽  
pp. 1103-1107
Author(s):  
Yasutaka Nagai ◽  
Akihiko Kato ◽  
Masaoki Iwasaki ◽  
Keisuke Kishita
Keyword(s):  
Absorption Spectroscopy ◽  
Mass Spectra ◽  
Active State ◽  
Nox Storage ◽  
Transient Phenomena ◽  
X Ray ◽  
Nox Storage Reduction ◽  
Catalytically Active ◽  
Fast Transient ◽  
X Ray Absorption

Monitoring the catalytically active state and online mass spectra clarified the fast transient phenomena occurring inside a NSR catalyst.

Activation of Catalytically Active Edge-Sharing Domains in Ca2FeCoO5 for Oxygen Evolution Reaction in Highly Alkaline Media

2019 ◽  
Vol 11 (32) ◽  
pp. 28823-28829 ◽  
Author(s):  
Damian Kowalski ◽  
Hisao Kiuchi ◽  
Teruki Motohashi ◽  
Yoshitaka Aoki ◽  
Hiroki Habazaki
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Alkaline Media ◽  
Active Edge ◽  
Catalytically Active

In Situ-Determined Catalytically Active State of LaNiO3 in Methane Dry Reforming

ACS Catalysis ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 1102-1112 ◽  
Author(s):  
Nicolas Bonmassar ◽  
Maged F. Bekheet ◽  
Lukas Schlicker ◽  
Albert Gili ◽  
Aleksander Gurlo ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Active State ◽  
Methane Dry Reforming ◽  
Catalytically Active

scholarly journals Severing of a hydrogen bond disrupts amino acid networks in the catalytically active state of the alpha subunit of tryptophan synthase

2014 ◽  
Vol 24 (4) ◽  
pp. 484-494 ◽  
Author(s):  
Jennifer M. Axe ◽  
Kathleen F. O'Rourke ◽  
Nicole E. Kerstetter ◽  
Eric M. Yezdimer ◽  
Yan M. Chan ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Amino Acid ◽  
Active State ◽  
Alpha Subunit ◽  
Tryptophan Synthase ◽  
Catalytically Active
Sign in / Sign up

Export Citation Format

Share Document