Results 61 to 70 of about 4,920,547 (298)

Emerging experimental and computational methods for studying redox‐regulated structural transitions

FEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass, Dana Reichmann, Gábor Erdős   +2 more
wiley   +1 more source

Density and temperature of energetic electrons in the Earth's magnetotail derived from high-latitude GPS observations during the declining phase of the solar cycle [PDF]

, 2011
Single relativistic-Maxwellian fits are made to high-latitude GPS-satellite observations of energetic electrons for the period January 2006-November 2010; a constellation of 12 GPS space vehicles provides the observations. The derived fit parameters (for
Denton, Michael, Cayton, T. E.
core   +6 more sources

CNN-LSTM-Attention-Based Electron Density Modeling Using CSES-01 Observations

Remote Sensing
The F2-layer peak electron density (NmF2), the F2-layer peak height (hmF2), and the α-Chapman scale height (H) are key parameters for characterizing the vertical structure of ionospheric electron density, and of great significance for space environment ...
Shuai Chen, He Huang, Jian Lin, Song Xu, Zeren Zhima   +4 more
doaj   +1 more source

An artificial neural network for analysis of ionograms obtained by ionosonde at the Ukrainian Antarctic Akademik Vernadsky station

Український антарктичний журнал, 2020
The article presents the developed artificial neural network for F2 ionosphere layer traces scaling on ionograms obtained using the IPS-42 ionosonde installed at the Ukrainian Antarctic Akademik Vernadsky station.
O. Bogomaz, M. Shulha, D. Kotov, A. Koloskov, A. Zalizovski   +4 more
doaj   +1 more source

Modeling of the cold electron plasma density for radiation belt physics

Frontiers in Astronomy and Space Sciences, 2023
This review focusses strictly on existing plasma density models, including ionospheric source models, empirical density models, physics-based and machine-learning density models.
J.-F. Ripoll, J.-F. Ripoll, V. Pierrard, V. Pierrard, G. S. Cunningham, X. Chu, K. A. Sorathia, D. P. Hartley, S. A. Thaller, V. G. Merkin, G. L. Delzanno, S. De Pascuale, A. Y. Ukhorskiy   +12 more
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

GRAPH2MAT: UNIVERSAL GRAPH TO MATRIX CONVERSION FOR ELECTRON DENSITY PREDICTION [PDF]

Electron density is a fundamental observable of an atomic system from which all ground state properties can be computed. As a prediction target for machine learning models, electron density is often represented on a dense real space grid, which is data ...
Alberto, Garcia, Pol, Febrer, Peter, Jørgensen, Pablo, Ordejon, Arghya, Bhowmik, Miguel, Pruneda   +5 more
core   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

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

FEBS 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, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

The nature of multiple boron-nitrogen bonds studied using electron localization function (ELF), electron density (AIM), and natural bond orbital (NBO) methods [PDF]

, 2020
Local nature of the boron-nitrogen (BN) bonding with different formal multiplicities (B≡N, B=N, B-N) have been investigated for 25 experimentally established organoboron molecules in both real and the Hilbert space, using topological analysis of electron
Mierzwa, G., Berski, S., Gordon, A.J.
core   +1 more source