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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ito, Hiroaki Nishigami, Yukinori Sonobe, Seiji Ichikawa, Masatoshi |
| Description | Country affiliation: Japan Author Affiliation: Ito H ( Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.); Nishigami Y ( Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.); Sonobe S ( Department of Life Science, Graduate School of Life Science, University of Hyogo, Harima Science Park City, Hyogo 678-1297, Japan.); Ichikawa M ( Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.) |
| Abstract | Actomyosin actively generates contractile forces that provide the plasma membrane with the deformation stresses essential to carry out biological processes. Although the contractile property of purified actomyosin has been extensively studied, to understand the physical contribution of the actomyosin contractile force on a deformable membrane is still a challenging problem and of great interest in the field of biophysics. Here, we reconstitute a model system with a cell-sized deformable interface that exhibits anomalous curvature-dependent wrinkling caused by the actomyosin cortex underneath the spherical closed interface. Through a shape analysis of the wrinkling deformation, we find that the dominant contributor to the wrinkled shape changes from bending elasticity to stretching elasticity of the reconstituted cortex upon increasing the droplet curvature radius of the order of the cell size, i.e., tens of micrometers. The observed curvature dependence is explained by the theoretical description of the cortex elasticity and contractility. Our present results provide a fundamental insight into the deformation of a curved membrane induced by the actomyosin cortex. |
| File Format | HTM / HTML |
| ISSN | 24700045 |
| e-ISSN | 24700053 |
| Journal | Physical Review E |
| Issue Number | 6 |
| Volume Number | 92 |
| Language | English |
| Publisher | American Physical Society |
| Publisher Date | 2015-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Biophysics Actomyosin Metabolism Mechanical Phenomena Models, Biological Amoeba Cytology Biomechanical Phenomena Cell Membrane Elasticity Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Statistics and Probability Statistical and Nonlinear Physics Condensed Matter Physics |
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