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首页> 外文期刊>Current Biology: CB >Kinesin-3 KLP-6 regulates intraflagellar transport in male-specific cilia of Caenorhabditis elegans.
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Kinesin-3 KLP-6 regulates intraflagellar transport in male-specific cilia of Caenorhabditis elegans.

机译:Kinesin-3 KLP-6调节秀丽隐杆线虫(Caenorhabditis elegans)男性雄性纤毛中的鞭毛内运输。

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摘要

Cilia are cellular sensory organelles whose integrity of structure and function are important to human health [1]. All cilia are assembled and maintained by kinesin-2 motors in a process termed intraflagellar transport (IFT), but they exhibit great variety of morphology and function. This diversity is proposed to be conferred by cell-specific modulation of the core IFT by additional factors, but examples of such IFT modulators are limited [[2], [3] and [4]]. Here we demonstrate that the cell-specific kinesin-3 KLP-6 acts as a modulator of both IFT dynamics and length in the cephalic male (CEM) cilia of Caenorhabditis elegans. Live imaging of GFP-tagged kinesins in CEM cilia shows partial uncoupling of the IFT motors of the kinesin-2 family, kinesin-II and OSM-3/KIF17, with a portion of OSM-3 moving independently of the IFT complex. KLP-6 moves independently of the kinesin-2 motors and acts to reduce the velocity of OSM-3 and IFT. Additionally, kinesin-II mutants display a novel CEM cilia elongation phenotype that is partially dependent on OSM-3 and KLP-6. Our observations illustrate modulation of the general kinesin-2-driven IFT process by a cell-specific kinesin-3 in cilia of C. elegans male neurons.
机译:纤毛是细胞的感觉器,其结构和功能的完整性对人体健康很重要[1]。所有纤毛均由驱动蛋白2马达以鞭毛内运输(IFT)的过程组装和维护,但它们具有多种形态和功能。提议通过附加因素通过核心IFT的特定于小区的调制来赋予这种多样性,但是这种IFT调制器的示例受到限制[[2],[3]和[4]]。在这里,我们证明了细胞特异性驱动蛋白3 KLP-6在 ce phalic m ale(CEM)纤毛中的IFT动态和长度的调节器i>秀丽隐杆线虫。 CEM纤毛中带有GFP标签的驱动蛋白的实时成像显示,驱动蛋白2家族,驱动蛋白II和OSM-3 / KIF17的IFT马达部分解偶联,而OSM-3的一部分独立于IFT复合物移动。 KLP-6的移动独立于kinesin-2电机,并起到降低OSM-3和IFT速度的作用。此外,驱动蛋白II突变体显示出一种新的CEM纤毛伸长表型,部分依赖于OSM-3和KLP-6。我们的观察结果表明,在C纤毛中,细胞特异性kinesin-3对一般kinesin-2驱动的IFT过程的调节。线虫雄性神经元。

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