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首页> 外文期刊>Cell cycle >Discs large 5 is required for polarization of citron kinase in mitotic neural precursors.
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Discs large 5 is required for polarization of citron kinase in mitotic neural precursors.

机译:在有丝分裂的神经前体中,香柠檬激酶极化需要5个大圆盘。

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摘要

Citron kinase (CitK), a protein essential to neurogenic cell division in the central nervous system, is highly polarized in neural progenitors. The mechanisms that polarize CitK to cellular domains that line the ventricular surface of neuroepithelium are currently not known. Here we report that Discs large 5 (Dlg5), a member of the MAGUK family, is an interactor of CitK required for CitK polarization. The CitK-Dlg5 interaction was first revealed in a protein array screen of proteins containing PDZ domains, and then subsequently confirmed by co-immunoprecipitation. Moreover, in Dlg5(-/-) mice CitK fails to polarize in mitotic neuronal precursors. In addition, the total number of mitotic progenitors and the ratio of ventricular to abventricular mitotic progenitors in developing neocortex are significantly decreased in Dlg5(-/-) embryos. Dlg5 is therefore required to maintain the polarization of a protein essential to neurogenic cytokinesis, and plays a role in localizing cell divisions to the surface of the lateral ventricles in embryonic brain.
机译:柚子激酶(CitK)是中枢神经系统中神经原性细胞分裂所必需的蛋白质,在神经祖细胞中高度极化。目前尚不知道使CitK极化到排列神经上皮心室表面的细胞结构域的机制。在这里,我们报告说,MAGUK家族的成员Discs large 5(Dlg5)是CitK极化所需的CitK的相互作用者。 CitK-Dlg5相互作用首先在包含PDZ域的蛋白质的蛋白质阵列筛选中显示,然后通过共免疫沉淀法进行确认。此外,在Dlg5(-/-)小鼠中,CitK无法在有丝分裂神经元前体中极化。此外,在Dlg5(-/-)胚胎中,发育中的新皮层中有丝分裂祖细胞的总数和心室与室性有丝分裂祖细胞的比例显着降低。因此,Dlg5是维持神经原性胞质分裂所必需的蛋白质极化所必需的,并且在将细胞分裂定位于胚胎脑侧脑室表面中发挥作用。

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