Malte Drescher

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In electron paramagnetic resonance (EPR) distance distributions between site-directedly attached spin labels in soft matter are obtained by measuring their dipole-dipole interaction. The analysis of these distance distributions can be misleading particularly for broad distributions, because the most probable distance deviates from the distance between the(More)
alpha-Synuclein (alphaS) is the main component of Lewy bodies from Parkinson's disease. That alphaS binds to membranes is known, but the conformation it adopts is still unclear. Pulsed EPR on doubly spin-labeled variants of alphaS sheds light on the most likely structure. For alphaS bound to vesicles large enough to accommodate also the extended(More)
The structure and function of membrane proteins is partly determined by the interaction of these proteins with the lipids of the membrane. Peptides forming single membrane-spanning alpha-helices, such as the WALP peptide (acetyl-GWWL(AL)(n)WWA-amide), are good models for such interactions. This interaction can be studied by investigating the aggregation of(More)
Plaques containing the aggregated beta-Amyloid (Abeta) peptide in the brain are the main indicators of Alzheimer's disease. Fibrils, the building blocks of plaques, can also be produced in vitro and consist of a regular arrangement of the peptide. The initial steps of fibril formation are not well understood and could involve smaller aggregates (oligomers)(More)
Alpha-synuclein (ASYN) is a major constituent of the typical protein aggregates observed in several neurodegenerative diseases that are collectively referred to as synucleinopathies. A causal involvement of ASYN in the initiation and progression of neurological diseases is suggested by observations indicating that single-point (e.g., A30P, A53T) or(More)
Guanosine rich nucleic acids fold into four stranded struc tures called quadruplexes.11.21 The telomeric repeats at the end of the chromosomes, have generated much interest. In humans, they are composed of the hexameric GGGTIA repeat with the 3' ends consisting of a 100 to 200 nucleotide single stranded overhang.!'1 As a result of their potential to switch(More)
The putative function of the Parkinson's disease-related protein alpha-Synuclein (alphaS) is thought to involve membrane binding. Therefore, the interaction of alphaS with membranes composed of zwitterionic (POPC) and anionic (POPG) lipids was investigated through the mobility of spin labels attached to the protein. Differently labelled variants of alphaS(More)
Minocycline prevents oxidative protein modifications and damage in disease models associated with inflammatory glial activation and oxidative stress. While the drug has been assumed to act by preventing the upregulation of proinflammatory enzymes, we probed here its direct chemical interaction with reactive oxygen species. The antibiotic did not react with(More)
Site-directed spin labeling (SDSL) in combination with electron paramagnetic resonance (EPR) spectroscopy allows studying the structure, dynamics, and interactions of proteins via distance measurements in the nanometer range. We here give an overview of available spin labels, the strategies for their introduction into proteins, and the associated potentials(More)
The coordination of metal cations by ligands is one fundamental interaction in chemistry, Both ionic and covalent interactions play a role. Due to its dative nature, coordinative bonding is reversible in a large number of cases. The reversibility is the most important reason for the application of coordination compounds in a large number of different(More)