Results 51 to 60 of about 510,591 (285)

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Hamilton Geometry - Phase Space Geometry from Modified Dispersion Relations

, 2018
Quantum gravity phenomenology suggests an effective modification of the general relativistic dispersion relation of freely falling point particles caused by an underlying theory of quantum gravity. Here we analyse the consequences of modifications of the
Barcaroli, Leonardo, Brunkhorst, Lukas K., Gubitosi, Giulia, Loret, Niccoló, Pfeifer, Christian   +4 more
core   +1 more source

Geometry of Twisted Sasaki Metric

Journal of Geometry and Symmetry in Physics, 2019
The Sasaki metric was introduced in [\textit{W. Klingenberg} and \textit{S. Sasaki}, Tohoku Math. J. (2) 27, 49--56 (1975; Zbl 0309.53036)]. Its attractive nature has enticed many geometers to study its and its related structures [\textit{K. Yano} and \textit{S. Ishihara}, Tangent and cotangent bundles. Differential geometry.
Belarbi, Lakehal, Elhendi, Hichem
openaire   +3 more sources

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

Can we make a Finsler metric complete by a trivial projective change?

, 2011
A trivial projective change of a Finsler metric $F$ is the Finsler metric $F + df$. I explain when it is possible to make a given Finsler metric both forward and backward complete by a trivial projective change.
A. Dirmeier, A.N. Bernal, A.N. Bernal, D. Azagra, E. Caponio, E. Caponio, M.A. Javaloyes   +6 more
core   +1 more source

Noncommutative Quantum Gravity [PDF]

, 2000
The possible role of gravity in a noncommutative geometry is investigated. Due to the Moyal *-product of fields in noncommutative geometry, it is necessary to complexify the metric tensor of gravity.
Ardalan, Bonora, Castellani, Chamseddine, Cheung, Chu, Clayton, Clayton, Clifford, Clifford, Connes, Connes, Damour, Einstein, Einstein, Eliezer, Gomis, J.W. Moffat, Madore, Madore, Majid, Martin, Moffat, Moffat, Moffat, Moffat, Moffat, Moffat, Moffat, Moffat, Moffat, Moffat, Moyal, Schomerus, Seiberg, Seiberg, Seiberg, Snyder, Snyder, Varilly, Weyl, Woodard, Yaglom   +42 more
core   +4 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Geometry of Metrics

, 2010
During the past thirty years hyperbolic type metrics have become popular tools also in modern mapping theory, e.g., in the study of quasiconformal and quasiregular maps in the euclidean $n$-space. We study here several metrics that one way or another are related to modern mapping theory and point out many open problems dealing with the geometry of such
openaire   +3 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Geometrothermodynamics as a singular conformal thermodynamic geometry

Physics Letters B, 2019
In this letter, we first redefine our formalism of the thermodynamic geometry introduced in [1,2] by changing coordinates of the thermodynamic space by means of Jacobian matrices.
Seyed Ali Hosseini Mansoori, Behrouz Mirza   +1 more
doaj   +1 more source