Chemical synthesis and functional characterization of melittin-TASP molecules
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Maintaining the integrity of their protective plasma membrane is a primary requirement of cells. Accordingly, cellular events that breach the membrane are tightly regulated1. Artificial vesicles used in drug delivery must also stay intact until they have r ...
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 ...
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 ...
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 ...
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 ...
Membrane proteins fulfill many central functions in the biological membrane. The insertion process of these proteins and their structure, which are intimately linked to their function, are not yet well understood. As a model we studied three proteins recon ...
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 ...
Strategically positioned arom. rings could switch the polyhydrocarbon chain from its normal extended conformation into folded one by the principle of intramol. recognition phenomena, favoring thus the intramol. reaction if these two arom. rings are correct ...
A review. The function of biol. important ion channels can be measured in supported lipid membranes by impedance spectroscopy. This approach offers substantial advantages over traditional electrophysiol. measurements. In this article, we present an overvie ...
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 ...