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Agnieszka Olżyńska et al.
Langmuir : the ACS journal of surfaces and colloids, 36(4), 1023-1033 (2020-01-07)
We introduce and study a multicomponent lipid film mimicking lipid composition of the human lung surfactant. It consists of phospholipids with various lipid headgroups and tail saturation. Furthermore, it includes cholesterol and oxidized lipids. Langmuir trough and fluorescence microscopy experiments
Celina Love et al.
Angewandte Chemie (International ed. in English) (2020-01-17)
In situ, reversible coacervate formation within lipid vesicles represents a key step in the development of responsive synthetic cellular models. Herein, we exploit the pH responsiveness of a polycation above and below its pKa , to drive liquid-liquid phase separation, to
Simli Dey et al.
Physical chemistry chemical physics : PCCP, 22(26), 14613-14620 (2020-06-03)
Oligomers are the key suspects in protein aggregation-linked diseases, such as Alzheimer's and Type II diabetes, and most likely exert their toxicity by interacting with lipid membranes. However, the "which oligomer" question remains an obstacle in understanding the disease mechanism
Shailendra S Rathore et al.
Cell reports, 29(13), 4583-4592 (2019-12-26)
Intracellular vesicle fusion is mediated by soluble N-ethylmaleimide sensitive factor attachment protein receptors (SNAREs) and Sec1/Munc18 (SM) proteins. It is generally accepted that membrane fusion occurs when the vesicle and target membranes are brought into close proximity by SNAREs and
Yuko Fujioka et al.
Nature, 578(7794), 301-305 (2020-02-07)
Many biomolecules undergo liquid-liquid phase separation to form liquid-like condensates that mediate diverse cellular functions1,2. Autophagy is able to degrade such condensates using autophagosomes-double-membrane structures that are synthesized de novo at the pre-autophagosomal structure (PAS) in yeast3-5. Whereas Atg proteins
Renato M S Cardoso et al.
Biochimica et biophysica acta. Biomembranes, 1862(3), 183157-183157 (2019-12-18)
Association of amphiphiles with biomembranes is important for their availability at specific locations in organisms and cells, being critical for their biological function. A prominent role is usually attributed to the hydrophobic effect, and to electrostatic interactions between charged amphiphiles
Marta Martinez-Calle et al.
Biochimica et biophysica acta. Biomembranes, 1862(6), 183216-183216 (2020-02-19)
Surfactant protein SP-B is absolutely required for the generation of functional pulmonary surfactant, a unique network of multilayered membranes, which stabilizes the respiratory air-liquid interface. It has been proposed that SP-B assembles into hydrophobic rings and tubes that facilitate the
Guoqing Cao et al.
Journal of lipid research, 52(12), 2169-2176 (2011-10-01)
Cholesteryl ester transfer protein (CETP) catalyses the exchange of cholesteryl ester and triglyceride between HDL and apoB containing lipoprotein particles. The role of CETP in modulating plasma HDL cholesterol levels in humans is well established and there have been significant
Masato Abe et al.
Biochemistry, 56(47), 6268-6280 (2017-11-02)
Remodeling of the acyl chain compositions of cardiolipin (CL) species by the transacylase tafazzin is an important process for maintaining optimal mitochondrial functions. The results of mechanistic studies on the tafazzin-mediated transacylation from phosphatidylcholine (PC) to monolyso-CL (MLCL) in artificial
Charles G Cranfield et al.
Langmuir : the ACS journal of surfaces and colloids, 33(26), 6630-6637 (2017-06-14)
Cyclotides are cyclic disulfide-rich peptides that are chemically and thermally stable and possess pharmaceutical and insecticidal properties. The activities reported for cyclotides correlate with their ability to target phosphatidylethanolamine (PE)-phospholipids and disrupt cell membranes. However, the mechanism by which this
Sigalit Meker et al.
Langmuir : the ACS journal of surfaces and colloids, 34(32), 9548-9560 (2018-07-19)
Amyloid-β (Aβ) peptide has been implicated in Alzheimer's disease, which is a leading cause of death worldwide. The interaction of Aβ peptides with the lipid bilayers of neuronal cells is a critical step in disease pathogenesis. Recent evidence indicates that
David A Bryce et al.
Analytical chemistry, 90(19), 11509-11516 (2018-09-04)
Interactions of lectins, proteins that selectively bind carbohydrates, play an important role in many biological processes including cell adhesion, immune response, and cell signaling. Given the range of lectin functions and their potential for application in disease detection, there is
Karolina Piecyk et al.
Bioconjugate chemistry, 31(4), 1156-1166 (2020-04-02)
The development of targeted anticancer drugs has been one of the most challenging goals of current research. Eukaryotic translation initiation factor 4E (eIF4E) is an oncogene that stimulates mRNA translation via binding to the 5' endcap structure. It is well
Dominika Kozon et al.
Macromolecular bioscience, 19(12), e1900254-e1900254 (2019-11-21)
Polycations, mimicking activity of antibacterial peptides, belong to an important class of molecules investigated as a support or as an alternative to antibiotics. In this work, studies of modified linear amphiphilic statistical polymethyloxazoline (PMOX) and polyethyleneimine copolymers (PMOX_PEI) series are
Nicholas M Frame et al.
Journal of molecular biology, 432(7), 1978-1995 (2020-02-10)
Serum amyloid A (SAA) is a plasma protein that transports lipids during inflammation. To explore SAA solution conformations and lipid-binding mechanism, we used hydrogen-deuterium exchange mass spectrometry, lipoprotein reconstitution, amino acid sequence analysis, and molecular dynamics simulations. Solution conformations of
Ahmad Kiani Karanji et al.
Journal of mass spectrometry : JMS, 55(1), e4470-e4470 (2019-11-23)
The first 17 amino acid residues of Huntingtin protein (Nt17 of htt) are thought to play an important role in the protein's function; Nt17 is one of two membrane binding domains in htt. In this study the binding ability of
Max Piffoux et al.
ACS nano, 12(7), 6830-6842 (2018-07-06)
Extracellular vesicles (EVs) are recognized as nature's own carriers to transport macromolecules throughout the body. Hijacking this endogenous communication system represents an attractive strategy for advanced drug delivery. However, efficient and reproducible loading of EVs with therapeutic or imaging agents
Aishik Chakraborty et al.
Molecules (Basel, Switzerland), 25(3) (2020-02-13)
Understanding interactions between inhaled nanoparticles and lung surfactants (LS) present at the air-water interface in the lung, is critical to assessing the toxicity of these nanoparticles. Specifically, in this work, we assess the impact of engineered carbon nanoparticles (ECN) on
Arnaud Marquette et al.
Biochimica et biophysica acta. Biomembranes, 1862(2), 183149-183149 (2019-12-10)
Viral protein R (Vpr) is a small accessory protein of 96 amino acids that is present in Human and simian immunodeficiency viruses. Among the very different properties that Vpr possesses we can find cell penetrating capabilities. Based on this and
Yasunori Saheki et al.
Nature cell biology, 18(5), 504-515 (2016-04-12)
Acute metabolic changes in plasma membrane (PM) lipids, such as those mediating signalling reactions, are rapidly compensated by homeostatic responses whose molecular basis is poorly understood. Here we show that the extended synaptotagmins (E-Syts), endoplasmic reticulum (ER) proteins that function
Jyotsna Bhatt Mitra et al.
Langmuir : the ACS journal of surfaces and colloids, 36(1), 397-408 (2019-12-04)
Ubiquicidin (UBI)/ribosomal protein S30 (RS30) is an intracellular protein with antimicrobial activities against various pathogens. UBI (29-41) and UBI (31-38) are two crucial peptides derived from Ubiquicidin, which have shown potential as infection imaging probes. Here, we report the interactions
Zvonimir Boban et al.
Cell biochemistry and biophysics, 78(2), 157-164 (2020-04-23)
Giant unilamellar vesicles (GUVs) are used extensively as models that mimic cell membranes. The cholesterol (Chol) content in the fiber cell plasma membranes of the eye lens is extremely high, exceeding the solubility threshold in the lenses of old humans.
John M Harrington et al.
The Journal of biological chemistry, 285(37), 28659-28666 (2010-07-10)
Trypanosoma brucei is the causative agent of both a veterinary wasting disease and human African trypanosomiasis, or sleeping sickness. The cell membrane of the developmental stage found within the mammalian host, the bloodstream form (BSF), is highly dynamic, exhibiting rapid
Camilla Skyttner et al.
Langmuir : the ACS journal of surfaces and colloids, 34(22), 6529-6537 (2018-05-15)
Membrane-active peptides that enable the triggered release of liposomal cargo are of great interest for the development of liposome-based drug delivery systems but require peptide-lipid membrane interactions that are highly defined and tunable. To this end, we have explored the
Y K Shin et al.
Biophysical journal, 61(6), 1443-1453 (1992-06-01)
A new general method for the determination of electrostatic potentials at biological surfaces is presented. The approach is based on measurement of the collision frequency of a charged nitroxide in solution with a nitroxide fixed to the surface at the
Xiaozheng Xu et al.
The Journal of cell biology, 219(6) (2020-05-22)
Blockade antibodies of the immunoinhibitory receptor PD-1 can stimulate the anti-tumor activity of T cells, but clinical benefit is limited to a fraction of patients. Evidence suggests that BTLA, a receptor structurally related to PD-1, may contribute to resistance to
Yo Yano et al.
Biophysical journal, 115(8), 1530-1540 (2018-10-03)
Sphingomyelin is an abundant lipid in some cellular membrane domains, such as lipid rafts. Hydrogen bonding and hydrophobic interactions of the lipid with surrounding components such as neighboring sphingomyelin and cholesterol (Cho) are widely considered to stabilize the raft-like liquid-ordered
Saba Ghazvini et al.
Langmuir : the ACS journal of surfaces and colloids, 34(3), 1159-1170 (2017-10-12)
Lipid membranes, a major component of cells, are subjected to significant changes in pH depending on their location in the cell: the outer leaflet of the cell membrane is exposed to a pH of 7.4 whereas lipid membranes that make
Stéphanie Jephthah et al.
Biomolecules, 10(4) (2020-04-23)
Magnesium transporter A (MgtA) is an active transporter responsible for importing magnesium ions into the cytoplasm of prokaryotic cells. This study focuses on the peptide corresponding to the intrinsically disordered N-terminal region of MgtA, referred to as KEIF. Primary-structure and
James Kruczek et al.
Langmuir : the ACS journal of surfaces and colloids, 33(4), 1105-1115 (2017-01-13)
Interactions of monovalent salts with lipid membranes are explored with molecular dynamics (MD) simulations. The simulations included the monovalent ions Na+ and K+, for their importance in physiology, Li+ for its small size and importance in several medical conditions including
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