Control of protein functional dynamics by peptide linkers

Area of Science:

• Structural Biology
• Biophysics
• Computational Biology

Background:

• Protein function relies on controlling structural flexibility, which arises from peptide bond angle relaxation.
• Interdomain linkages, formed by oligopeptides, dictate protein flexibility and influence secondary, tertiary, and quaternary structures.
• Multidomain proteins exhibit significant structural heterogeneity, often facilitated by flexible peptide linkers.

Purpose of the Study:

• To review the historical discovery and current understanding of protein domains and their linkers.
• To explore the structural, computational, and biophysical aspects of protein linkers.
• To present emerging applications of peptide structural properties in synthetic chimeric proteins.

Main Methods:

• Review of historical discoveries and current scientific literature.
• Analysis of structural, computational, and biophysical data related to protein domains and linkers.
• Examination of domain fusion in synthetic multifunctional chimeric proteins.

Main Results:

• Peptide linkers significantly influence protein structural flexibility and dynamics.
• Both flexible and rigid linkers play critical roles in protein architecture and function.
• Soft peptide linkers enable large-scale structural heterogeneity and biomolecular motion.
• The absence of linker-mediated motion, as in molecular rulers, also has functional importance.

Conclusions:

• Understanding protein domains and linkers is essential for comprehending protein function and dynamics.
• Biophysical and computational advancements have deepened our knowledge of linker-mediated protein motion.
• Knowledge of peptide structural properties opens avenues for designing novel synthetic multifunctional proteins.