3D structure determination of amyloid fibrils using solid-state NMR spectroscopy
Langue
EN
Article de revue
Ce document a été publié dans
Methods (San Diego, Calif.). 2018, vol. 138-139, p. 26-38
Résumé en anglais
The amyloid fold is structurally characterized by a typical cross-beta architecture, which is under debate to represent an energy-favourable folding state that many globular or natively unfolded proteins can adopt. Being ...Lire la suite >
The amyloid fold is structurally characterized by a typical cross-beta architecture, which is under debate to represent an energy-favourable folding state that many globular or natively unfolded proteins can adopt. Being initially solely associated with amyloid fibrils observed in the propagation of several neurodegenerative disorders, the discovery of non-pathological (or "functional") amyloids in many native biological processes has recently further intensified the general interest invested in those cross-beta supramolecular assemblies. The insoluble and non-crystalline nature of amyloid fibrils and their usually inhomogeneous appearance on the mesoscopic level pose a challenge to biophysical techniques aiming at an atomic-level structural characterization. Solid-state NMR spectroscopy (SSNMR) has granted breakthroughs in structural investigations on amyloid fibrils ranging from the assessment of the impact of polymorphism in disease development to the 3D atomic structure determination of amyloid fibrils. First landmark studies towards the characterization of atomic structures and interactions involving functional amyloids have provided new impulses in the understanding of the role of the amyloid fold in native biological functions. Over the last decade many strategies have been developed in protein isotope labelling, NMR resonance assignment, distance restraint determination and 3D structure calculation of amyloid fibrils based on SSNMR approaches. We will here discuss the emerging concepts and state-of-the-art methods related to the assessment of amyloid structures and interactions involving amyloid entities by SSNMR.< Réduire
Mots clés en anglais
Solid-state NMR
Amyloid fibrils
Structural biology
Protein aggregation
Prions
Structure calculation
Isotopic labelling
Proton detection
Project ANR
Nanostructures biologiques et synthétiques étudiées par Résonance Magnétique Nucléaire du Solide - ANR-14-CE09-0020
Structures d'Assemblages Supramoléculaires par RMN du Solide : le Pseudopilus du Système de Sécrétion de Type II et le Tube de Queue du Bactériophage - ANR-13-PDOC-0017
Structures d'Assemblages Supramoléculaires par RMN du Solide : le Pseudopilus du Système de Sécrétion de Type II et le Tube de Queue du Bactériophage - ANR-13-PDOC-0017
Unités de recherche