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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Possible involvement of protein phosphorylation in the regulation of cytoplasmic organization and streaming in root hair cells as revealed by a protein phosphatase inhibitor, calyculin A
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Possible involvement of protein phosphorylation in the regulation of cytoplasmic organization and streaming in root hair cells as revealed by a protein phosphatase inhibitor, calyculin A

机译：蛋白质磷酸酶抑制剂calyculin A揭示了蛋白质磷酸化可能参与了根毛细胞的胞质组织和流动调节

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摘要

The effects of a protein phosphatase inhibitor, calyculin A (CA), on cytoplasmic streaming and cytoplasmic organization were examined in root hair cells of Limnobium stoloniferum. CA at concentrations higher than 50 nM inhibited cytoplasmic streaming and also induced remarkable morphological changes in the cyto plasm. The transvacuolar strands, in which actin filament bundles were oriented parallel to the long axis, disappeared and spherical cytoplasmic bodies emerged in the CA-treated cells. In these spherical bodies, actin filaments were present and the spherical bodies were connected to each other by thin strands of actin filaments. Upon CA removal, transvacuolar strands, in which actin filament bundles were aligned, and cytoplasmic streaming reappeared. A nonselective inhibitor for protein kinases, K-252a, delayed the inhibitory effect of CA on cytoplasmic streaming and suppressed the CA-induced formation of the spherical bodies. From these results, it is suggested that phosphatases sensitive to CA regulate cytoplasmic streaming and are involved in the organization of the cytoplasm in root hair cells. [References: 39]
机译：研究了一种蛋白质磷酸酶抑制剂，calyculin A（CA）对sto草Limnobium stoloniferum根毛细胞中细胞质流和细胞质组织的影响。浓度高于50 nM的CA抑制了细胞质流，并且还诱导了细胞质的显着形态变化。在CA处理过的细胞中，肌动蛋白丝束平行于长轴取向的跨真空链消失了，球形胞质体出现了。在这些球形体中，存在肌动蛋白丝，并且球形体通过肌动蛋白丝的细线彼此连接。去除CA后，肌动蛋白丝束对齐的跨真空链重新出现，并出现细胞质流。蛋白激酶的非选择性抑制剂K-252a延迟了CA对细胞质流的抑制作用，并抑制了CA诱导的球体形成。从这些结果表明，对CA敏感的磷酸酶调节细胞质流，并参与根毛细胞中细胞质的组织。 [参考：39]

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