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首页> 外文期刊>Molecular biology of the cell >Regulation of Distinct Septin Rings in a Single Cell by Elm1p and Gin4p Kinases
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Regulation of Distinct Septin Rings in a Single Cell by Elm1p and Gin4p Kinases

机译:Elm1p和Gin4p激酶在单个细胞中不同Septin环的调节。

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Septins are conserved, GTP-binding proteins that assemble into higher order structures, including filaments and rings with varied cellular functions. Using four-dimensional quantitative fluorescence microscopy of Ashbya gossypii fungal cells, we show that septins can assemble into morphologically distinct classes of rings that vary in dimensions, intensities, and positions within a single cell. Notably, these different classes coexist and persist for extended times, similar in appearance and behavior to septins in mammalian neurons and cultured cells. We demonstrate that new septin proteins can add through time to assembled rings, indicating that septins may continue to polymerize during ring maturation. Different classes of rings do not arise from the presence or absence of specific septin subunits and ring maintenance does not require the actin and microtubule cytoskeletons. Instead, morphological and behavioral differences in the rings require the Elm1p and Gin4p kinases. This work demonstrates that distinct higher order septin structures form within one cell because of the action of specific kinases.
机译:Septins是保守的GTP结合蛋白,可组装成更高阶的结构,包括具有不同细胞功能的细丝和环。使用Ashbya棉酚真菌细胞的二维定量荧光显微镜技术,我们显示了隔蛋白可以组装成形态上不同的环类,这些环的大小,强度和位置在单个细胞中都不同。值得注意的是,这些不同的类别共存并持续较长的时间,其外观和行为与哺乳动物神经元和培养细胞中的隔膜相似。我们证明了新的septin蛋白可以增加组装环的时间,这表明septins在环成熟过程中可能会继续聚合。特定的Septin亚基的存在与否不会导致不同类型的环,并且环的维持不需要肌动蛋白和微管细胞骨架。相反,环中的形态和行为差异需要Elm1p和Gin4p激酶。这项工作表明,由于特定激酶的作用,一个细胞内形成了不同的高阶Septin结构。

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