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The intricate three-dimensional geometries of protein tertiary structures underlie protein function and emerge through a folding process from one-dimensional chains of amino acids. The exact spatial sequence and configuration of amino…

生物大分子 · 定量生物学 2021-02-24 Nora Molkenthin , Steffen Mühle , Antonia S J S Mey , Marc Timme

We investigate the formation of beta-sheet structures in proteins without taking into account specific sequence-dependent hydrophobic interactions. To accomplish this, we introduce a model which explicitly incorporates both solvation…

软凝聚态物质 · 物理学 2009-11-07 Chinlin Guo , Herbert Levine , Margaret S. Cheung , David A. Kessler

We propose a novel method for the determination of the effective interaction potential between the amino acids of a protein. The strategy is based on the combination of a new optimization procedure and a geometrical argument, which also…

软凝聚态物质 · 物理学 2009-10-31 Jort van Mourik , Cecilia Clementi , Amos Maritan , Flavio Seno , J. R. Banavar

Understanding complex biological macromolecules, especially proteins, is vital for grasping their diverse chemical functions with direct impact in biology and pharmacology. While techniques like X-ray crystallography and cryo-electron…

生物大分子 · 定量生物学 2024-04-12 S. H. Mejias , A. L. Cortajarena , R. Mincigrucci , C. Svetina , C. Masciovecchio

Specific protein-protein interactions are crucial in the cell, both to ensure the formation and stability of multi-protein complexes, and to enable signal transduction in various pathways. Functional interactions between proteins result in…

生物物理 · 物理学 2016-11-21 Anne-Florence Bitbol , Robert S. Dwyer , Lucy J. Colwell , Ned S. Wingreen

The Ramachandran plot is a potent way to understand structures of biomolecules, however, the original formulation of the Ramachandran plot only considers backbone conformations. We formulate a new interpretation of the original Ramachandran…

We investigate the problem of estimating the structure factor, or spectra, of stationary spatial point processes. In the first part, we establish a minimax lower bound for this estimation problem, using an approach tailored to second-order…

统计理论 · 数学 2025-11-19 Gabriel Mastrilli

We discuss Bragg scattering on both Bose and Fermi gases with strong short-range interactions in the deep inelastic regime of large wave vector transfer $q$, where the dynamic structure factor is dominated by a resonance near the…

量子气体 · 物理学 2017-03-07 Johannes Hofmann , Wilhelm Zwerger

We present an extended structural study of globular complexes made by mixing a positively charge protein (lysozyme) and a negatively charged polyelectrolyte (PSS). We study the influence of all the parameters that may act on the structure…

软凝聚态物质 · 物理学 2010-07-26 Jérémie Gummel , François Boué , Daniel Clemens , Fabrice Cousin

In order to optimize a self-assembly reaction, it is essential to understand the factors that govern its pathway. Here, we examine the influence of nucleation pathways in a model system for addressable, multicomponent self-assembly based on…

软凝聚态物质 · 物理学 2018-08-01 Martin Sajfutdinow , William M. Jacobs , Aleks Reinhardt , Christoph Schneider , David M. Smith

We study the formation of protein-protein encounter complexes with a Langevin equation approach that considers direct, steric and thermal forces. As three model systems with distinctly different properties we consider the pairs…

生物大分子 · 定量生物学 2009-11-13 Jakob Schluttig , Denitsa Alamanova , Volkhard Helms , Ulrich S. Schwarz

Intrinsically disordered proteins (IDPs) play a significant role in intracellular phenomena and are known to exist in an ensemble of inter-converting conformations in solution. Accurately modeling the conformations of IDPs in solution poses…

生物物理 · 物理学 2025-08-27 Rohan S. Adhikari , Winnie H. Shi , Amanda B. Marciel , Walter G. Chapman

TThe fundamental properties of the postulated dark matter (DM) affect the internal structure of gravitationally-bound structures. In the cold dark matter paradigm, DM particles interact only via gravity. Their distribution is well…

宇宙学与河外天体物理 · 物理学 2022-10-05 D. Eckert , S. Ettori , A. Robertson , R. Massey , E. Pointecouteau , D. Harvey , I. G. McCarthy

How do living cells achieve sufficient abundances of functional protein complexes while minimizing promiscuous non-functional interactions? Here we study this problem using a first-principle model of the cell whose phenotypic traits are…

生物大分子 · 定量生物学 2011-01-04 Muyoung Heo , Sergei Maslov , Eugene I. Shakhnovich

The binding of a cationic surfactant (hexadecyltrimethylammonium bromide, CTAB) to a negatively charged natural polysaccharide (pectin) at air-solution interfaces, was investigated on single interfaces and in foams, versus the linear charge…

软凝聚态物质 · 物理学 2010-05-20 Marie-Hélène M. H. Ropers , Bruno Novales , François Boué , Monique A. V. Axelos

The forward-backward charge asymmetry (AFB) at hadron colliders is sensitive to both the electroweak (EW) symmetry breaking represented by the effective weak mixing angle, and the proton structure information in the initial state modeled by…

高能物理 - 唯象学 · 物理学 2022-08-17 Siqi Yang , Yao Fu , Minghui Liu , Liang Han , Tie-Jiun Hou , C. -P. Yuan

Protein flexibility is crucial for understanding protein structures, functions, and dynamics, and it can be measured through experimental methods such as X-ray crystallography. Theoretical approaches have also been developed to predict…

生物大分子 · 定量生物学 2024-11-06 Hongsong Feng , Jeffrey Y. Zhao , Guo-Wei Wei

We report simulation studies of 33 single intrinsically disordered proteins (IDPs) using coarse-grained (CG) bead-spring models where interactions among different amino acids are introduced through a hydropathy matrix and additional…

软凝聚态物质 · 物理学 2023-12-07 Swarnadeep Seth , Brandon Stine , Aniket Bhattacharya

The control of biofilm formation is a challenging goal that has not been reached yet in many aspects. One is the role of van der Waals forces and another the importance of mutual interactions between the adsorbing and the adsorbed…

软凝聚态物质 · 物理学 2019-08-12 Y. Schmitt , H. Hähl , C. Gilow , H. Mantz , K. Jacobs , O. Leidinger , M. Bellion , L. Santen

Various studies have shown that food structure has an impact on digestion kinetics. We focus here on the effects of gastric and intestinal enzymes (in-vitro digestion) on two canola seed storage proteins, napin and cruciferin. To monitor…