Education and Pragmatism

Book published by Sense Publisher (2005)

Compétitivité de l’économie luxembourgeoise 2004

Report (2005)

Molecular dynamics simulation of truncated bovine adrenodoxin

in Biopolymers (2005), 78(1), 9-20

The 128 amino acid long soluble protein adrenodoxin (Adx) is a typical member of the ferredoxin protein family that are electron carrier proteins with an iron-sulfur cofactor. Adx carries electrons from ... [more ▼]

The 128 amino acid long soluble protein adrenodoxin (Adx) is a typical member of the ferredoxin protein family that are electron carrier proteins with an iron-sulfur cofactor. Adx carries electrons from adrenodoxin reductase (AdR) to cytochrome P450s. Its binding modes to these proteins were previously characterized by site-directed mutagenesis, by X-ray crystallography for the complex Adx:AdR, and by NMR. However, no clear evidence has been provided for the driving force that promotes Adx detachment from AdR upon reduction. Here, we characterized the conformational dynamics of unbound Adx in the oxidized and reduced forms using 2-20 ns long molecular dynamics simulations. The most noticeable difference between both forms is the enhanced flexibility of the loop (47-51) surrounding the iron-sulfur cluster in the reduced form. Together with several structural displacements at the binding interface, this increased flexibility may be the key factor promoting unbinding of reduced Adx from AdR. This points to an intrinsic property of reduced Adx that drives dissociation. (c) 2005 Wiley Periodicals, Inc. [less ▲]

«Editorial»

in Voir (2005)

La regulation américaine des agences de notation

in Risques : les cahiers de l'assurance (2005), (61), 55-55

Cyclophilin a binds to linear peptide motifs containing a consensus that is present in many human proteins

in Journal of Biological Chemistry (2005), 280(25), 23668-23674

Cyclophilin A ( CypA) is a peptidyl-prolyl cis/trans-isomerase that is involved in multiple signaling events of eukaryotic cells. It might either act as a catalyst for prolyl bond isomerization, or it can ... [more ▼]

Cyclophilin A ( CypA) is a peptidyl-prolyl cis/trans-isomerase that is involved in multiple signaling events of eukaryotic cells. It might either act as a catalyst for prolyl bond isomerization, or it can form stoichiometric complexes with target proteins. We have investigated the linear sequence recognition code for CypA by phage display and found the consensus motif FGPXLp to be selected after five rounds of panning. The peptide FGP-DLPAGD showed inhibition of the isomerase reaction and NMR chemical shift mapping experiments highlight the CypA interaction epitope. Ligand docking suggests that the peptide was able to bind to CypA in the cis- and trans-conformation. Protein Data Bank searches reveal that many human proteins contain the consensus motif, and several of these protein motifs are shown to interact with CypA in vitro. These sequences represent putative target sites for binding of CypA to intracellular proteins. [less ▲]

Dynamical binding of proline-rich peptides to their recognition domains

in Biochimica et Biophysica Acta-Proteins and Proteomics (2005), 1754(1-2), 232-238

Recognition of proline-rich sequences plays an important role for the assembly of multi-protein complexes during the course of eukaryotic signal transduction and is mediated by a set of protein folds that ... [more ▼]

Recognition of proline-rich sequences plays an important role for the assembly of multi-protein complexes during the course of eukaryotic signal transduction and is mediated by a set of protein folds that share characteristic features. For many complex systems containing proline-rich sequences, multiple binding modes have been found by theoretical and/or experimental studies. In this review, we discuss the different binding modes as well as the correlated dynamics of the peptides and their recognition domains, and some implications to their biological functions. Further-more, we give an outlook of the systems in the context of systems biology. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Ethique et humanitaire. Mise en œuvre des pratiques de consultation et de participation

in Pédiatre (Le) (2005), (211), 2-5

Au cours des dernières décennies, l’aide humanitaire a pris un essor considérable. En même temps, elle s’est trouvée confrontée à un nombre croissant de critiques dont la plus significative est celle d ... [more ▼]

Au cours des dernières décennies, l’aide humanitaire a pris un essor considérable. En même temps, elle s’est trouvée confrontée à un nombre croissant de critiques dont la plus significative est celle d'être perçue comme un système défini et imposé par l’occident, fonctionnant sur un mode « descendant » et ayant de ce fait, une capacité d’écoute sélective. Le rôle des populations touchées dans leur propre survie est l'un des défis les plus complexes auquel le monde des acteurs humanitaires doit faire face. En particulier la prise en compte des points de vue, des attentes, des besoins exprimés, des responsabilités, des compétences des populations concernées, durant tout le cycle de la gestion du projet, est une condition indispensable à l'amélioration de la réponse humanitaire vue en tant que processus de réappropriation de la part des populations de leur pouvoir d'agir sur leur vie. A cet égard, l'idée selon laquelle une implication active du public est une condition nécessaire pour assurer le caractère éthique de toute délibération et garantir l’acceptation des interventions par les populations est aujourd'hui reconnue, mais est-elle suffisante, est elle toujours possible ? [less ▲]

Private or self-regulation? A comparative study of forest certification choices in Canada, the United States and Germany

in Forest Policy and Economics (2005), 7(1), 53-69

Der Einfluss von Expertise auf den Prozess der schulischen Leistungsbeurteilung

in Zeitschrift für Entwicklungspsychologie und Padagogische Psychologie (2005), 37

Two experiments investigated the effects of information processing goals on the recall of information about pupils and on achievement judgments. In Experiment 1 teachers (experts) were presented with case ... [more ▼]

Two experiments investigated the effects of information processing goals on the recall of information about pupils and on achievement judgments. In Experiment 1 teachers (experts) were presented with case reports about pupils. The reports were either read under the instruction (a) to form an impression of the personality of the described pupils or (b) to predict their future development. Afterwards subjects had to recall the case reports and to rate the academic achievement of the described pupils. Experiment 2 was a replication with university freshmen (laymen) as subjects. Depending on their processing goal, experts switched their processing of pupil information from top-down strategies involving the activation of prototypical categories about pupil personalities to bottom-up processing which consists of integrating the features of the individual case. Thus, processing goals appear as moderators in teachers’ judgments. [less ▲]