Insights into protein misfolding and aggregation enabled by solid-state NMR spectroscopy.

Area of Science:

• Biochemistry
• Structural Biology
• Biophysics

Background:

• Protein and peptide aggregation into insoluble states is central to many diseases.
• Similar processes affect polypeptide pharmaceuticals and inspire self-assembling materials.
• Neurodegenerative diseases like Alzheimer's, Parkinson's, and Huntington's involve protein aggregation.

Purpose of the Study:

• To survey recent solid-state NMR (ssNMR) contributions to understanding polypeptide aggregate structures.
• To explore how ssNMR findings inform molecular mechanisms of protein misfolding and aggregation.
• To focus on amyloid fibrils and oligomers in neurodegenerative diseases.

Main Methods:

• Solid-state Nuclear Magnetic Resonance (ssNMR) spectroscopy.
• Structural and dynamics-based analyses of protein aggregates.
• Comparative studies across different amyloidogenic proteins.

Main Results:

• Identified common structural themes in polypeptide aggregates, including a compact alternating short-β-strand/β-arc amyloid core architecture.
• ssNMR provides atomic-level insights into the structure and dynamics of disease-related protein aggregates.
• Findings highlight conserved features across different amyloidogenic proteins.

Conclusions:

• Recent ssNMR studies have significantly advanced the structural understanding of protein aggregates.
• These insights are crucial for elucidating the molecular mechanisms of protein misfolding and aggregation in diseases.
• The findings have implications for both understanding disease pathogenesis and designing novel biomaterials.