Concept

Liaison peptidique

Publications associées (157)

Highly-resolved Spectra of Gas-phase Gramicidin S: A Benchmark for Peptide Structure Calculations

We have measured a vibrationally-resolved UV spectrum of doubly-protonated gramicidin S (GS) in the gas phase and, subsequently, a highly-resolved, conformer-specific infrared spectra in the 6 μm fingerprint region, using a cold ion trap in combination wit ...

American Chemical Society2010

Cyclosporine A-Sensitive, Cyclophilin B-Dependent Endoplasmic Reticulum-Associated Degradation

Maurizio Molinari, Riccardo Bernasconi

Peptidyl-prolyl cis/trans isomerases (PPIs) catalyze cis/trans isomerization of peptide bonds preceding proline residues. The involvement of PPI family members in protein refolding has been established in test tube experiments. Surprisingly, however, no da ...

Public Library of Science2010

Toward Structural Dynamics: Protein Motions Viewed by Chemical Shift Modulations and Direct Detection of C ' N Multiple-Quantum Relaxation

Geoffrey Bodenhausen, Daniel Abergel

Multiple quantum relaxation in proteins reveals unexpected relationships between correlated or anti-correlated conformational backbone dynamics in alpha-helices or beta-sheets. The contributions of conformational exchange to the relaxation rates of C'N coh ...

American Chemical Society2010

Radical Stability Directs Electron Capture and Transfer Dissociation of Beta-Amino Acids in Peptides

Yury Tsybin, Hisham Ben Hamidane, Aleksey Vorobyev

We report on the characteristics of the radical-ion-driven dissociation of a diverse array of beta-amino acids incorporated into alpha-peptides, as probed by tandem electron-capture and electron-transfer dissociation (ECD/ETD) mass spectrometry. The report ...

2010

Coherent ultrafast torsional motion and isomerization of a biomimetic dipolar photoswitch

Majed Chergui, Andrea Cannizzo, Olivier Christian Bräm, Stefan Haacke

Femtosecond fluorescence up-conversion, UV-Vis and IR transient absorption spectroscopy are used to study the photo-isomerization dynamics of a new type of zwitterionic photoswitch based on a N-alkylated indanylidene pyrroline Schiff base framework (ZW-NAI ...

Royal Society of Chemistry2010

Disulfide-directed histone ubiquitylation reveals plasticity in hDot1L activation

Beat Fierz

We have developed a readily accessible disulfide-directed methodology for the site-specific modification of histones by ubiquitin and ubiquitin-like proteins. The disulfide-linked analog of mono-ubiquitylated H2B stimulated the H3K79 methyltransferase acti ...

2010

The prolyl-aminodipeptidases and their inhibitors as therapeutic targets for fibrogenic disorders

Sandrine Gerber

Many biologically active peptides are protected from general proteolytic degradation by evolutionary conserved prolines (Pro), due to conformational constraints imposed by the Pro residue. Thus the biological importance of prolyl-specific peptidases points ...

2009

Long-range energy transfer in proteins

Francesco Piazza

Proteins are large and complex molecular machines. In order to perform their function, most of them need energy, e. g. either in the form of a photon, as in the case of the visual pigment rhodopsin, or through the breaking of a chemical bond, as in the pre ...

2009

Peptide/protein – polymer conjugates: synthetic strategies and design concepts

Harm-Anton Klok, Marc Gauthier

This feature article provides a compilation of tools available for preparing well-defined peptide/protein–polymer conjugates, which are defined as hybrid constructs combining (i) a defined number of peptide/protein segments with uniform chain lengths and d ...

2008

Effects of N-terminus substitution on the structure and spectroscopy of gas-phase helices

Thomas Rizzo

Because of the importance of helices in the secondary structure of proteins, we have undertaken a study of their spectroscopy, fragmentation patterns and conformations in the gas phase. In this work, we describe the effects of substitution at the N-terminu ...

2008

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