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Factor Va alternative conformation reconstruction using atomic force microscopy
R C Chaves, S Dahmane, M Odorico
1Jean-Luc Pellequer, IBS, Univ. Grenoble Alpes/CNRS/CEA, 71 avenue des Martyrs CS 10090 F-38044 Grenoble, Cedex 9, France,
Thrombosis and Haemostasis
|September 5, 2014
Summary
Protein conformational dynamics are crucial for biological function. This study reveals significant angle variations between human coagulation factor Va
Area of Science:
- Biophysics
- Molecular Biology
- Structural Biology
Background:
- Protein conformational variability influences biological function.
- Collective domain motions enhance protein-partner binding.
- Atomic Force Microscopy (AFM) enables single-molecule imaging of macromolecules.
Purpose of the Study:
- To characterize the conformational variability of human coagulation factor Va (FVa) C domains.
- To apply the AFM-assembly reconstruction protocol for detailed molecular analysis.
Main Methods:
- Utilized Atomic Force Microscopy (AFM) to obtain topographic images of FVa in a liquid environment.
- Applied the AFM-assembly protocol to reconstruct complete molecular conformations from AFM data.
Main Results:
- Demonstrated significant conformational variability in FVa.
- Quantified the angle between the C1 and C2 domains of FVa, ranging from 40° to 166°.
Conclusions:
- The dynamic arrangement of FVa's C1 and C2 domains may impact its binding to phospholipid membranes.
- Understanding protein dynamics is key to elucidating molecular mechanisms.
