Raman Research Institute, Bangalore 560080, India.
Phys Rev Lett. 2013 Apr 19;110(16):168104. doi: 10.1103/PhysRevLett.110.168104. Epub 2013 Apr 18.
We study the dynamics and patterning of polar contractile filaments on the surface of a cylindrical cell using active hydrodynamic equations that incorporate couplings between curvature and filament orientation. Cables and rings spontaneously emerge as steady state configurations on the cylinder, and can be stationary or moving, helical or tilted segments moving along helical trajectories. We observe phase transitions in the steady state patterns upon changing cell diameter or motor-driven activity and make several testable predictions. Our results are relevant to the dynamics and patterning of a variety of active biopolymers in cylindrical cells.
我们使用主动流体动力学方程研究圆柱形细胞表面上的极性收缩丝的动力学和图案形成，该方程结合了曲率和纤维取向之间的耦合。电缆和环在圆柱上自发地成为稳定状态的配置，可以是静止的或移动的，螺旋的或倾斜的片段沿着螺旋轨迹移动。我们观察到在改变细胞直径或马达驱动活性时，在稳定状态图案中出现相转变，并做出了几个可测试的预测。我们的结果与圆柱形细胞中各种活性生物聚合物的动力学和图案形成有关。
