轮藻属藻类中肌动蛋白丝的极性

Polarity of actin filaments in Characean algae.

作者信息

Kersey Y M, Hepler P K, Palevitz B A, Wessells N K

出版信息

Proc Natl Acad Sci U S A. 1976 Jan;73(1):165-7. doi: 10.1073/pnas.73.1.165.

DOI:10.1073/pnas.73.1.165

PMID:1061112

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC335861/

Abstract

Heavy meromyosin from rabbit muscle combines with oriented Nitella and Chara actin in vitro to form arrowhead structures directed opposite to the cytoplasmic flow in the living plant cell. All filaments and all bundles of filaments in the apically directed stream are similarly oriented; polarity with respect to the axis of the thallus is reversed in the downward stream. The actin filaments are attached to the chloroplasts at the ectoplasm-endoplasm interface, where the motive force for streaming is known to be generated.

摘要

来自兔肌肉的重酶解肌球蛋白在体外与定向排列的丽藻属和轮藻属肌动蛋白结合，形成箭头状结构，其方向与活植物细胞中的细胞质流动方向相反。在顶端流动的液流中，所有的细丝和细丝束都有相似的定向；相对于叶状体轴的极性在向下的液流中是相反的。肌动蛋白丝附着在叶绿体与外质-内质的界面处，已知这里是产生流动动力的地方。