Viscoelastic properties of actin-coated membranes

被引：71

作者：

Helfer, E. ^{[1
]}

Harlepp, S. ^{[1
]}

Bourdieu, L. ^{[1
]}

Robert, J. ^{[1
]}

MacKintosh, F.C. ^{[2
]}

Chatenay, D. ^{[1
]}

机构：

[1] Lab. Dynamique des Fluides Complexes, U.M.R. 7506, 3 rue de l'Université, 67084 Strasbourg Cedex, France

[2] Department of Physics, University of Michigan, Ann Arbor, MI 48109-1120, United States

来源：

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | 2001年 / 63卷 / 2 I期

关键词：

Backscattering - Bending (deformation) - Biochemistry - Biopolymers - Elastic moduli - Elasticity - Lipids - Mathematical models - Particle beam tracking - Rheology - Viscoelasticity - Viscosity;

D O I：

10.1103/PhysRevE.63.021904

中图分类号：

学科分类号：

摘要：

The modifications made by the cytoskeletal network on the mechanical properties of a membrane were studied. Composite structures of self-assembled actin filaments were biochemically attached to a giant unilamellar vesicles. Optical tweezers and single-particle tracking experiments were used to study the dynamics of actin coated membranes. Thermally excited position fluctuations of a probe bead attached biochemically to membrane was measured. A model that relates power spectrum of the thermal fluctuations to viscoelastic properties of the membrane was proposed. Presence of actin shell increases the bending modulus and induces a 2D shear modulus.

引用

页码：021904 / 021901