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Intrinsically disordered p53 and its complexes populate compact conformations in the gas phase
Kevin Pagel1, Eviatar Natan, Zoe Hall
1Physical & Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, UK.
Angewandte Chemie (International Ed. in English)
|July 11, 2012
Summary
The tumor suppressor protein p53, crucial for cancer suppression, undergoes spontaneous shrinking. Intrinsically disordered segments cause the protein to collapse into a compact form in the gas phase.
Area of Science:
- Biochemistry
- Structural Biology
- Computational Biology
Background:
- The tumor suppressor protein p53 plays a critical role in preventing cancer.
- p53 contains both structured and intrinsically disordered regions.
- Understanding protein behavior in different environments is essential.
Purpose of the Study:
- To investigate the gas-phase structural behavior of the tumor suppressor protein p53.
- To determine how intrinsically disordered segments affect protein conformation.
- To analyze the gas-phase topology of p53 subdomains.
Main Methods:
- Ion mobility mass spectrometry (IM-MS) was employed to analyze p53.
- Molecular dynamics (MD) simulations were used to model protein behavior.
- The study focused on the gas-phase conformation of p53.
Main Results:
- Structured subdomains of p53 maintained their topology in the gas phase.
- Intrinsically disordered segments induced spontaneous collapse of the protein.
- p53 adopted a compact conformation when disordered segments were present.
Conclusions:
- Intrinsically disordered regions drive significant conformational changes in p53.
- The gas-phase behavior of p53 provides insights into its structural dynamics.
- This study highlights the role of disorder in protein structure and function.
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