Yamamoto K, Kikuyama M, Sutoh-Yamamoto N, Kamitsubo E, Katayama E
Department of Biology Faculty of Science, Chiba University, Japan.
J Mol Biol. 1995 Nov 24;254(2):109-12. doi: 10.1006/jmbi.1995.0603.
Cytoplasmic streaming is a fundamental process for the transport of molecules and organelles in plant cells. A myosin-like protein responsible for cytoplasmic streaming in fresh water alga, Chara corallina, has been purified. Electron micrographs of this protein revealed that it has two heads with similar size and shape to those of muscle myosin (myosin II) but its tail was shorter than that of muscle myosin with a globular structure at its distal end like that of myosin V. The myosin cosedimented with vesicles composed of phosphatidyl serine like other non-muscle myosin species involved in intracellular transport.
胞质环流是植物细胞中分子和细胞器运输的基本过程。一种负责淡水藻类轮藻胞质环流的类肌球蛋白蛋白已被纯化。这种蛋白质的电子显微镜照片显示，它有两个头部，其大小和形状与肌肉肌球蛋白（肌球蛋白II）的相似，但它的尾部比肌肉肌球蛋白的短，在其远端有一个球状结构，类似于肌球蛋白V。与参与细胞内运输的其他非肌肉肌球蛋白种类一样，这种肌球蛋白与由磷脂酰丝氨酸组成的囊泡共沉降。
