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Updated: Jul 20, 2026
08:03
Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
Published on: April 13, 2022
Antibody evolution constrains conformational heterogeneity by tailoring protein dynamics
Jörg Zimmermann1, Erin L Oakman, Ian F Thorpe
1Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
Summary
Protein evolution refines flexibility. Mutations in the antifluorescein antibody 4-4-20 localized its combining site from a flexible, heterogeneous ensemble to a single conformation, demonstrating evolutionary control over protein dynamics.
Area of Science:
- Protein evolution
- Molecular dynamics
- Biophysics
Background:
- Protein evolution is hypothesized to originate from conformationally heterogeneous precursors.
- Gene duplication and mutation are key mechanisms for optimizing protein function.
- Quantifying protein flexibility and heterogeneity during evolution is challenging.
Purpose of the Study:
- To characterize protein heterogeneity and dynamics during evolution.
- To investigate the role of mutations in shaping protein conformation.
- To understand how protein dynamics are tailored by evolution.
Main Methods:
- Nonlinear laser spectroscopy
- Surface plasmon resonance
- Molecular dynamics simulations
Main Results:
- Evolutionary mutations localized the antibody 4-4-20 combining site from a heterogeneous ensemble to a single conformation.
- Mutations acted cooperatively and over long distances to rigidify the protein.
- Protein dynamics were demonstrably tailored by evolutionary processes.
Conclusions:
- Evolution can precisely control protein dynamics and conformational heterogeneity.
- Understanding protein dynamics is crucial for elucidating the evolution of novel protein functions.
- This study provides a framework for studying the evolution of protein flexibility.
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