Structural fluctuations between two conformational states of a transmembrane helical peptide are related to its channel-forming properties in planar lipid membranes
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A review. The efficient anal. of the function of ion channels is an important task in many different fields ranging from (bio)analytics and drug-screening to nanoelectronics. Here, the modulation of the channel activity of a synthetic ligand gated ion chan ...
Aerolysin secreted by the human pathogen Aeromonas hydrophila belongs to a group of bacterial toxins that are hemolytic and form channels in biological membranes. The toxin is secreted as an inactive precursor proaerolysin that must be proteolytically proc ...
Tumor necrosis factor TNF can trigger increases in membrane conductance of mammalian cells in a receptor-independent manner via its lectin-like domain. A lectin-deficient TNF mutant, lacking this activity, was able to bind to artificial liposomes in a pH-d ...
How membrane receptors transduce external signals across the membrane and activate intracellular processes is a key question for fundamental research and for therapeutic purposes. Reliable in situ investigations requiest to preserve the full biological act ...
Serum amyloid A (SAA) is a small apolipoprotein that binds to high-density lipoproteins in the serum. Although SAA seems to play a role in host defense and lipid transport and metabolism, its specific functions have not been defined. Despite the growing im ...
The functional anal. of single ion channel proteins presents a serious bottleneck in the process of finding new pharmacol. active compds. Currently available single channel recording methods are not suited for automation and miniaturization. However, new t ...
Gating of an artificial receptor was monitored for the first time by impedance spectroscopy in tethered lipid bilayer. Subnanomolar concns. of antibody were detected by modulation of the channel activity. The principle of gating by an antibody is particula ...
All biol. ion channels are selectively permeable to specific ions. This mechanism needs to be understood in terms of the interaction of the permeating ions with the surrounding water and protein mols. During the past several years, there have been enormous ...
In this work the authors have shown that stable gigaohm seals over micrometer-sized holes can be obtained in a time-frame of seconds by the electrophoretic self-positioning of charged lipid membranes. For the first time, single-channel events were recorded ...
Two channels were observed in extracts of whole Mycobacterium bovis BCG cells using organic solvents and detergents. The channels derived from organic solvent treatment had a single-channel conductance of about 4.0 nS in 1 M KCl in lipid bilayer membranes ...
