Interaction of conical membrane inclusions: Effect of lateral tension
Interaction of conical membrane inclusions: Effect of lateral tension
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DOI：
10.1103/physreve.57.6988
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发表时间：
1998-06-01
影响因子：
2.4
通讯作者：
Helfrich, W
中科院分区：
文献类型：
--
作者：
Weikl, TR;Kozlov, MM;Helfrich, W
考虑到两个刚性的锥形包裹体嵌在受侧向张力的膜中，我们研究了这些包裹体之间的膜介导的相互作用，这种相互作用源于与锥体相关的帽状膜变形。在不消失的横向张力下，发现相互作用取决于相对于膜平面的锥的方向。取向相等的包裹体在所有距离上都是相互排斥的，而取向相反的包裹体在较小距离上相互排斥，在较大距离上相互吸引。斥力和引力都随着侧向张力的增加而变得陌生。这与基于同一静态模型的侧向张力消失情况下的预测结果不同。在没有张力的情况下，包裹体在所有距离上相互排斥，而不受它们的相对方向的影响。我们得出结论，侧向张力可能导致锥形膜内含物聚集。
Considering two rigid conical inclusions embedded in a membrane subject to lateral tension, we study the membrane-mediated interaction between these inclusions that originates from the hat-shaped membrane deformations associated with the cones. At nonvanishing lateral tensions, the interaction is found to depend on the orientation of the cones with respect to the membrane plane. The interaction of inclusions of equal orientation is repulsive at all distances between them, while the inclusions of opposite orientation repel each other at small separations, but attract each other at larger ones. Both the repulsive and attractive forces become stranger with increasing lateral tension. This is different from what has been predicted on the basis of the same static model for the case of vanishing lateral tension. Without tension, the inclusions repel each other at all distances independently of their relative orientation. We conclude that lateral tension may induce the aggregation of conical membrane inclusions.