Thromb Haemost 2014; 112(06): 1167-1173
DOI: 10.1160/th14-06-0481
Blood Coagulation, Fibrinolysis and Cellular Haemostasis
Schattauer GmbH

Factor Va alternative conformation reconstruction using atomic force microscopy

Rui C. Chaves
1   CEA, iBEB, Service de Biochimie et Toxicologie Nucléaire, Bagnols sur Cèze, France
,
Selma Dahmane
1   CEA, iBEB, Service de Biochimie et Toxicologie Nucléaire, Bagnols sur Cèze, France
3   Present address: Inserm, Unité 1054, Single Molecule Biophysics Department, Centre de Biochimie Structurale, Montpellier, France
,
Michael Odorico
1   CEA, iBEB, Service de Biochimie et Toxicologie Nucléaire, Bagnols sur Cèze, France
,
Gerry A.F. Nicolaes
2   Department of Biochemistry, Cardiovascular Research Institute Maastricht, CARIM, Maastricht University, the Netherlands
,
Jean-Luc Pellequer
1   CEA, iBEB, Service de Biochimie et Toxicologie Nucléaire, Bagnols sur Cèze, France
4   New address: IBS, Univ. Grenoble Alpes/CNRS/CEA, 71 avenue des Martyrs CS 10090, F-38044 Grenoble, Cedex 9, France
› Author Affiliations

Financial support: This work was initially supported by the Agence Nationale de la Recherche [ANR-07-PCVI-0002–01] and the Commissariat à l’énergie atomique et aux énergies alternatives (CEA).
Further Information

Publication History

Received: 01 June 2014

Accepted after major revision: 15 July 2014

Publication Date:
29 November 2017 (online)

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Summary

Protein conformational variability (or dynamics) for large macromolecules and its implication for their biological function attracts more and more attention. Collective motions of domains increase the ability of a protein to bind to partner molecules. Using atomic force microscopy (AFM) topographic images, it is possible to take snapshots of large multi-component macromolecules at the single molecule level and to reconstruct complete molecular conformations. Here, we report the application of a reconstruction protocol, named AFM-assembly, to characterise the conformational variability of the two C domains of human coagulation factor Va (FVa). Using AFM topographic surfaces obtained in liquid environment, it is shown that the angle between C1 and C2 domains of FVa can vary between 40° and 166°. Such dynamical variation in C1 and C2 domain arrangement may have important implications regarding the binding of FVa to phospholipid membranes.