Microtubule binding protein PACRG plays a role in regulating specific ciliary dyneins during microtubule sliding.

Microtubule binding protein PACRG plays a role in regulating specific ciliary dyneins during microtubule sliding.
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微管结合蛋白PACRG在微管滑动过程中调节特定睫状动力蛋白方面起作用。

DOI:
10.1002/cm.21340
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发表时间:
2016-12
期刊:
Cytoskeleton (Hoboken, N.J.)
影响因子:
--
通讯作者:
Smith EF
Smith EF
中科院分区:
其他
文献类型:
--
作者:
Mizuno K;Dymek EE;Smith EF

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运动的真核细胞纤毛和鞭毛的复杂波形特征产生的时间和空间调节作用的多个动力蛋白亚型之间的轴丝微管的子集产生滑动。已经确定了多种蛋白质复合物与双微管相关,并介导关键轴丝结构(如径向辐条和中央装置)与动力蛋白臂马达之间的调节信号;这些复合物包括N-DRC、MIA和CSC复合物。以往的研究表明,PACRG(parkin co-regulated gene)形成一个复合体,锚定在轴丝双微管上。PACRG的缺失导致纤毛运动缺陷和纤毛相关疾病。在这里,我们使用体外微管滑动试验来证明PACRG及其相互作用物是信号通路的一部分,该信号通路包括中央装置、径向辐条和特定的内部动力蛋白臂子形式来控制动力蛋白驱动的微管滑动。使用生物化学方法,我们的研究还表明,PACRG与径向辐条相互作用。
The complex waveforms characteristic of motile eukaryotic cilia and flagella are produced by the temporally and spatially regulated action of multiple dynein subforms generating sliding between subsets of axonemal microtubules. Multiple protein complexes have been identified that are associated with the doublet microtubules and that mediate regulatory signals between key axonemal structures, such as the radial spokes and central apparatus, and the dynein arm motors; these complexes include the N-DRC, MIA, and CSC complexes. Previous studies have shown that PACRG (parkin co-regulated gene) forms a complex that is anchored to the axonemal doublet microtubules. Loss of PACRG causes defects in ciliary motility and cilia related diseases. Here, we use an in vitro microtubule sliding assay to demonstrate that PACRG and its interactors are part of a signaling pathway that includes the central apparatus, radial spokes and specific inner dynein arm subforms to control dynein-driven microtubule sliding. Using a biochemical approach, our studies also indicate that PACRG interacts with the radial spokes.
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