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Myosin-Va mediates RNA distribution in primary fibroblasts from multiple organs.

机译:肌球蛋白-Va介导来自多个器官的原代成纤维细胞中的RNA分布。

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摘要

Myosin-Va has been shown to have multiple functions in a variety of cell types, including a role in RNA transport in neurons. Using primary cultures of cells from organs of young dilute-lethal (Myo5a(d-l)/Myo5a(d-l)) null mutant mice and wild-type controls, we show that in some, but not all, tissues, RNA distribution is dramatically different in the homozygous null mutant cells. The dependence of RNA localization on myosin-Va correlates with the relative abundance of the brain-specific splicing pattern of the myosin-Va tail. We also show that myosin-Va is involved in RNA localization soon after synthesis, because the effects of its absence are diminished for RNAs that are more than 30 min old. Finally, we show that localization of beta-actin mRNA is significantly changed by the absence of myosin-Va. These results suggest that myosin-Va is involved in a transient transport or tethering function in the perinuclear region.
机译:肌球蛋白-Va已显示在多种细胞类型中具有多种功能,包括在神经元中RNA转运中的作用。使用来自幼稀致死(Myo5a(dl)/ Myo5a(dl))无效突变小鼠器官的细胞的原代培养物和野生型对照,我们显示出在一些(但不是全部)组织中,RNA分布显着不同。纯合无效突变细胞。 RNA对肌球蛋白-Va的依赖性与肌球蛋白-Va尾巴的大脑特异性剪接模式的相对丰度相关。我们还表明,合成后不久,肌球蛋白-Va就参与了RNA的定位,因为对于30分钟以上的RNA,其缺失的影响已减弱。最后,我们表明,由于缺乏肌球蛋白-Va,β-肌动蛋白mRNA的定位发生了显着变化。这些结果表明,肌球蛋白-Va参与核周区域的瞬时转运或束缚功能。

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