Results 51 to 60 of about 11,091,979 (254)

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Global MHD simulation of flux transfer events at the high-latitude magnetopause observed by the cluster spacecraft and the SuperDARN radar system [PDF]

open access: yes, 2008
A global magnetohydrodynamic numerical simulation is used to study the large-scale structure and formation location of flux transfer events (FTEs) in synergy with in situ spacecraft and ground-based observations. During the main period of interest on the
Daly, P. W.   +7 more
core   +4 more sources

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Electron-Transfer Reactions of Re(CO)5:  Atom-Transfer-Concerted Mechanism vs Bimetallic Intermediate Formation

open access: yes, 2016
Flash photochemically generated Re(CO)5 reacts with halide complexes, Cu(Me4[14]-1,3,8,10-tetraeneN4)X+, Cu(Me2pyo[14]trieneN4)X+, and Ni(Me2pyo[14]trieneN4)X+ (X = Cl, Br, I) and ion pairs, [Co(bipy)33+, X-].
M. Sarakha (2970261)   +1 more
core   +1 more source

Modeling Interfacial Electron Transfer in the Double Layer: The Interplay Between Electrode Coupling and Electrostatic Driving [PDF]

open access: yes, 2019
This manuscript presents a theoretical model for simulating interfacial electron transfer reactions within the electrical double layer. This model resolves the population density of redox active species and simulated electron transfer at the level of ...
Aditya, Limaye, Adam, Willard
core   +2 more sources

Quantum chemical determination of molecular geometries and spectral investigation of 4-ethoxy-2, 3-difluoro benzamide

open access: yesHeliyon, 2019
The present work reports the application of density functional theory (DFT) at B3LYP with various basis sets which provide the relationship between the structural and spectral properties of 4-ethoxy-2, 3-difluoro benzamide (4EDFB). A Complete vibrational
V. Vidhya, A. Austine, M. Arivazhagan
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

open access: yesFEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Unexpected Electron Spin Density on the Axial Methionine Ligand in CuA Suggests Its Involvement in Electron Pathways [PDF]

open access: yes, 2019
The CuA center is a paradigm for the study of long-range biological electron transfer. This metal center is an essential cofactor for terminal oxidases like Cytochrome c oxidase, the enzymatic complex responsible for cellular respiration in eukaryotes ...
Pedro M., Alzari   +7 more
core   +2 more sources

SINGLET OXYGEN QUANTUM YIELD OF ZINC AND COPPER TETRACARBOXYPHTHALOCYANINE: EXPERIMENTAL AND THEORETICAL STUDY

open access: yesProspectiva, 2022
The metal-phthalocyanine coordination complexes can absorb visible light with great efficiency. Besides, these compounds have prolific catalytic activity in multiple reactions e.g. electron and/or energy transfer reactions. The singlet oxygen production
Jesús Peña   +2 more
doaj   +1 more source

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