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Is protein folding hierarchic? I. Local structure and peptide folding
1Dept of Biochemistry, Beckman Center, Stanford University Medical Center School of Medicine, CA 94305-5307, USA.
Trends in Biochemical Sciences
|March 24, 1999
Summary
Protein folding, even without clear intermediates, follows a hierarchical process starting locally. Local protein sequence information largely dictates secondary structure formation, supported by experimental and theoretical evidence.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Protein folding pathways vary; some exhibit clear intermediates, while others do not.
- Understanding the fundamental mechanisms of protein folding is crucial for molecular biology.
Purpose of the Study:
- To propose a unified hierarchical model for protein folding applicable to all small proteins.
- To investigate the role of local sequence information in determining protein secondary structure.
Main Methods:
- Review of existing experimental data on protein folding kinetics.
- Theoretical considerations and analysis of protein sequence-structure relationships.
- Comparison of secondary structures in proteins and peptides.
Main Results:
- All small proteins, regardless of detectable intermediates, fold via a hierarchical process.
- Protein folding initiates with local interactions.
- Local sequence information is a primary determinant of protein secondary structure.
Conclusions:
- A universal hierarchical model of protein folding is proposed.
- Local sequence-dependent interactions are fundamental to secondary structure formation.
- Further research should explore the interplay between local and global interactions in protein folding.