Multiple-State Monitoring of SOD1 Amyloid Formation at Single-Residue Resolution by Rheo-NMR Spectroscopy.
J Am Chem Soc
; 143(28): 10604-10613, 2021 07 21.
Article
en En
| MEDLINE
| ID: mdl-34232041
ABSTRACT
Formation of protein aggregates or fibrils entails the conversion of soluble native protein monomers via multiple molecular states. No spectroscopic techniques have succeeded in capturing the transient molecular-scale events of fibrillation in situ. Here we report residue- and state-specific real-time monitoring of the fibrillation of amyotrophic lateral sclerosis-related SOD1 by rheology NMR (Rheo-NMR) spectroscopy. Under moderately denaturing conditions, where NMR signals of folded and unfolded monomeric SOD1 are simultaneously observable, the cross-peak intensities of folded monomeric SOD1 decreased faster than those of the unfolded species, and a 310-helix in folded SOD1 was deformed prior to global unfolding. Furthermore, real-time protein dynamics analysis identified residues involved in the core structure formation of SOD1 oligomers. Our findings provide insight into local and global unfolding events in SOD1 and fibril formation. This Rheo-NMR analysis will be applicable not only to atomic-level monitoring of other amyloidogenic proteins but also to quantification of shear-induced structural changes of non-amyloidogenic proteins and elucidation of shear-enhanced chemical phenomena such as viscosity increase and crystallization of various solution-state compounds.
Texto completo:
1
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Am Chem Soc
Año:
2021
Tipo del documento:
Article
País de afiliación:
Japón