Electrostatic and hydrophobic interactions of lipid-associated α-synuclein: The role of a water-limited interfaces in amyloid fibrillation

2018 ◽  
Vol 1860 (9) ◽  
pp. 1854-1862 ◽  
Author(s):  
Tae Su Choi ◽  
Jong Yoon Han ◽  
Chae Eun Heo ◽  
Sun Woo Lee ◽  
Hugh I. Kim
Keyword(s):  
Hydrophobic Interactions ◽  
Electrostatic And Hydrophobic Interactions ◽  
Amyloid Fibrillation

scholarly journals Peripheral myelin of Xenopus laevis: Role of electrostatic and hydrophobic interactions in membrane compaction

2008 ◽  
Vol 162 (1) ◽  
pp. 170-183 ◽  
Author(s):  
XiaoYang Luo ◽  
Jana Cerullo ◽  
Tamara Dawli ◽  
Christina Priest ◽  
Zaid Haddadin ◽  
...  
Keyword(s):  
Xenopus Laevis ◽  
Hydrophobic Interactions ◽  
Electrostatic And Hydrophobic Interactions

Solvent accessibility and hydrophobicity in the adsorption of alkylammonium cations at air/water and Hg/water interfaces. Part 1. Behavior at the air/water interface in relation to hydration properties

1981 ◽  
Vol 59 (13) ◽  
pp. 1978-1986 ◽  
Author(s):  
R. Bennes ◽  
B. E. Conway
Keyword(s):  
Surface Potential ◽  
Hydrophobic Interactions ◽  
Solvent Accessibility ◽  
Water Interface ◽  
Ion Distribution ◽  
Progressive Change ◽  
Hydration Properties ◽  
Air Water Interface ◽  
Electrostatic And Hydrophobic Interactions

By means of adsorption and surface-potential studies on a series of R4−nN+Hn perchlorates at the air/water interface, the role of hydrophobic and hydrophilic interaction in the adsorption and ion distribution of these salts near the air/water interface is examined. While the adsorption of the alkylamine ions increases as n decreases from three to zero, inclusive, the surface-potential change accompanying the adsorption decreases. This effect is interpreted in terms of opposing hydrophilic, electrostatic and hydrophobic interactions between the organic ion and water near the liquid surface, leading to a progressive change of double-layer ion distribution. In Part II, comparative studies of the same series of compounds at the Hg/water interface are reported.

Receptors on red cells for Plasmodium falciparum and their interaction with merozoites

1984 ◽  
Vol 307 (1131) ◽  
pp. 189-200 ◽  
Keyword(s):  
Plasmodium Falciparum ◽  
Hydrophobic Interactions ◽  
Membrane Lipid ◽  
Red Cells ◽  
Red Cell ◽  
Naturally Occurring ◽  
Electrostatic And Hydrophobic Interactions ◽  
Wheatgerm Agglutinin ◽  
Human Red Cells

The red cell sialoglycoproteins (glycophorins, The red cell sialoglycoproteins (glycophorins, α(A), δ(B) and β and γ(C)) play a crucial role in the invasion of human red cells by merozoites of Plasmodium falciparum . Red cells deficient in any of the glycophorins, including β (also known as glycoconnectin), resist infection by this parasite to varying degrees. These cells and other naturally occurring well-characterized glycophorin variants provide extremely powerful tools to dissect the role of these molecules in invasion. The binding of merozoites to human red cells appears analogous to the binding of wheatgerm agglutinin to sialoglycoconjugates. In both systems O- and N-linked oligosaccharides may be involved. Membrane lipid has not been implicated as a receptor for merozoites, but may instead non-specifically modify binding, as may electrostatic and hydrophobic interactions. The results of data using monoclonal antibodies and lectins, although possibly helpful in identifying specific determinants, must be interpreted with caution. Overall the data suggest that the red cell receptors for all strains of P. falciparum tested to date are located on the glycophorins. Accordingly these putative receptors have been used to affinity-purify complementary parasite components which may yet prove to be of protective immunological significance in a vaccine.

Mechanism of Reversible Self-Association of a Monoclonal Antibody: Role of Electrostatic and Hydrophobic Interactions

2015 ◽  
Vol 104 (2) ◽  
pp. 577-586 ◽  
Author(s):  
Reza Esfandiary ◽  
Arun Parupudi ◽  
Jose Casas-Finet ◽  
Dhanesh Gadre ◽  
Hasige Sathish
Keyword(s):  
Monoclonal Antibody ◽  
Hydrophobic Interactions ◽  
Electrostatic And Hydrophobic Interactions ◽  
Self Association

Interaction of sulphone based reactive dyes with cationic surfactant: a spectroscopic and conductometric study

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Misbah Iram ◽  
Hamadia Sultana ◽  
Muhammad Usman ◽  
Bazgha Ahmad ◽  
Nadia Akram ◽  
...  
Keyword(s):  
Strong Interaction ◽  
Cetyltrimethylammonium Bromide ◽  
Hydrophobic Interactions ◽  
Reactive Dyes ◽  
Micellar System ◽  
Palisade Layer ◽  
Micellar Systems ◽  
Gibbs Energies ◽  
Electrostatic And Hydrophobic Interactions ◽  
Conductometric Study

Abstract Interaction of sulphone based reactive dyes, designated as dye-1 and dye-2, with cationic micellar system of cetyltrimethylammonium bromide (CTAB), has been investigated by spectroscopic and conductometeric measurements. Efficiency of the selected micellar systems is assessed by the values of binding constant (K b ), partition coefficient (K x ) and respective Gibbs energies. Critical micelle concentration (CMC) of surfactant, electrostatic and hydrophobic interactions as well as polarity of the medium plays significant role in this phenomenon. The negative values of Gibbs energies of binding (∆G b ) and partition (∆G p ) predicts the feasibility and spontaneity of respective processes. Similarly negative values of ∆G m and ∆H m and positive values of ∆S m , calculated from conductometeric data, further, revealed the exothermicity, spontaneity and, thus, stability of system. The results, herein, have disclosed the strong interaction between dye and surfactant molecules. The dye-2 has been observed to be solubilized to greater extent, as compared to dye 1, due to strong interaction ith hydrophiles of CTAB and accommodation of its molecules in palisade layer of micelle closer to the micelle/water interface.

The role of hydrophobic interactions in binding of polyamines to non NMDA receptor ion channels

1998 ◽  
Vol 37 (10-11) ◽  
pp. 1381-1391 ◽  
Author(s):  
Changhai Cu ◽  
Robert Bähring ◽  
Mark L. Mayer
Keyword(s):  
Ion Channels ◽  
Nmda Receptor ◽  
Hydrophobic Interactions

Some Considerations on Confined Water: The Thermal Behavior of Transport Properties in Water-Glycerol and Water-Methanol Mixtures

MRS Advances ◽  
2016 ◽  
Vol 1 (26) ◽  
pp. 1891-1902 ◽  
Author(s):  
Francesco Mallamace ◽  
Carmelo Corsaro ◽  
Domenico Mallamace ◽  
Cirino Vasi ◽  
Sebastiano Vasi ◽  
...  
Keyword(s):  
Hydrophobic Interactions ◽  
Molar Fraction ◽  
Relaxation Times ◽  
Confined Water ◽  
Self Diffusion ◽  
Excess Value ◽  
Water Glycerol ◽  
System Properties ◽  
Dynamical Crossover

ABSTRACTWe discuss recent literature data on the relaxation times (the primary tα), viscosity, and self-diffusion in water-glycerol and water-methanol mixtures across a wide temperature range from the stable water phase to the deep supercooled regime (373–147K). In particular, to clarify the role of hydrophilicity interactions (the hydrogen bonds) and hydrophobic interactions we study the mixture in terms of the water molar fraction (XW) with fixed temperatures at 5K steps across the entire composition range, and we find a marked deviation from the ideal thermodynamic behavior of the transport functions. This deviation is strongly T and XW dependent and spans values that range from two orders of magnitude at the highest temperature to more than five in the deeply supercooled regime (more precisely, at ≃200K). We analyze these deviations in terms of how the measured values differ from ideal values and find that the hydrogen-bonding water network dominates system properties up to XW = 0.3. We also examine an Arrhenius plot of the maximum excess value (Δtα(T) vs. 1/T) and find two significant changes due to water: one at the dynamical crossover temperature (TL ≃ 225K, i.e., the locus of the Widom line), and one at T ≃ 315K (the water isothermal compressibility χT minimum).

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