Structural dynamics flexibility informs function and evolution at a proteome scale.

Area of Science:

• Biochemistry
• Structural Biology
• Bioinformatics

Background:

• Protein structures exhibit dynamic atomic fluctuations and movements essential for function.
• Evidence linking protein dynamics to biological function across the human proteome is limited.
• Understanding residue-level dynamics is key to protein function and evolution.

Purpose of the Study:

• To develop a novel dynamic flexibility index (dfi) for quantifying residue dynamics.
• To assess the importance of protein dynamics for biological function in 100 human proteins.
• To integrate structural dynamics with evolutionary conservation for genomic and functional genomics.

Main Methods:

• Developed a dynamic flexibility index (dfi) to measure residue dynamics.
• Applied dfi to analyze 100 human proteins.
• Correlated dfi with functionally critical positions, disease variations, and substitution rates.

Main Results:

• The dfi revealed concordant patterns of dynamic properties across the human proteome.
• Preservation of residue dynamic properties is critical for protein and biological function.
• Structural dynamics are as important as sequence conservation for protein function.

Conclusions:

• Protein dynamics play a critical role in shaping biological functions.
• The dynamic flexibility index (dfi) is a valuable tool for analyzing protein dynamics.
• Integrating structural dynamics with evolutionary conservation enhances understanding of protein function and evolution.