Franz-Xaver Schmid

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The trigger factor of Escherichia coli is a prolyl isomerase and a chaperone. It interacts with the ribosome and affects the folding of newly formed protein chains. Therefore, the dynamics of the interactions of trigger factor with the ribosome and with unfolded protein chains should be tailored for this function. Previously, we had found that binding of(More)
Inflammation is a critical contributing factor to the development and the progression of atherosclerosis. Recently, the acute-phase protein pentraxin-3 (PTX3), which has C-terminal sequence homology with the classic pentraxin C-reactive protein (CRP), was described to be increased in patients with myocardial infarction. In this study, we have investigated(More)
HisF, the cyclase subunit of imidazole glycerol phosphate synthase (ImGPS) from Thermotoga maritima, is an extremely thermostable (βα)(8)-barrel protein. We elucidated the unfolding and refolding mechanism of HisF. Its unfolding transition is reversible and adequately described by the two-state model, but 6 weeks is necessary to reach equilibrium (at 25(More)
The effect of the polypeptide environment on polyalanine-induced fibril formation was investigated with amyloidogenic fragments from PAPBN1, a nuclear protein controlling polyadenylation. Mutation-caused extensions of the natural 10 alanine sequence up to maximally 17 alanines result in fibril formation of PABPN1 and the development of the disease(More)
A strongly stabilized form of the β1 domain of the streptococcal protein G, termed Gβ1-M2, was previously obtained by an in vitro selection method for stabilized protein variants. It contains four substitutions, but how they contribute to the Gibbs free energy of denaturation (ΔG(D)) could not be determined, because, unlike the wild-type protein, Gβ1-M2(More)
Conversion of native proteins into amyloid fibrils is irreversible and therefore it is difficult to study the interdependence of conformational stability and fibrillation by thermodynamic analyses. Here we approached this problem by fusing amyloidogenic poly-alanine segments derived from the N-terminal domain of the nuclear poly (A) binding protein PABPN1(More)
The basic concepts of protein stability were laid out about 50 years ago, and have been refined since then. During folding, a protein chain loses chain entropy, and the backbone and the side chains must be partially desolvated. These energetically unfavorable processes must be overcome by a gain in energy from intraprotein interactions, such as hydrogen(More)
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