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首页> 外文期刊>Cell Reports >The Ubiquitin Receptor S5a/Rpn10 Links Centrosomal Proteasomes with Dendrite Development in the Mammalian Brain
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The Ubiquitin Receptor S5a/Rpn10 Links Centrosomal Proteasomes with Dendrite Development in the Mammalian Brain

机译:泛素受体S5a / Rpn10将中心蛋白酶体与哺乳动物脑中的树突发育联系起来。

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Proteasomes drive the selective degradation of protein substrates with covalently linked ubiquitin chains in eukaryotes. Although proteasomes are distributed throughout the cell, specific biological functions of the proteasome in distinct subcellular locales remain largely unknown. We report that proteasomes localized at the centrosome regulate the degradation of local ubiquitin conjugates in mammalian neurons. We find that the proteasomal subunit S5a/Rpn10, a ubiquitin receptor that selects substrates for degradation, is essential for proteasomal activity at centrosomes in neurons and thereby promotes the elaboration of dendrite arbors in the rodent brain in vivo. We also find that the helix-loop-helix protein Id1 disrupts the interaction of S5a/Rpn10 with the proteasomal lid and thereby inhibits centrosomal proteasome activity and dendrite elaboration in neurons. Together, our findings define a function for a specific pool of proteasomes at the neuronal centrosome and identify a biological function for S5a/Rpn10 in the mammalian brain.
机译:蛋白酶体通过真核生物中的共价连接的泛素链驱动蛋白质底物的选择性降解。尽管蛋白酶体分布在整个细胞中,但是蛋白酶体在不同亚细胞区域的特异性生物学功能仍是未知之数。我们报告说,位于中心体的蛋白酶体调节哺乳动物神经元中局部泛素结合物的降解。我们发现,蛋白酶体亚基S5a / Rpn10(一种泛素受体,选择降解底物)对于神经元中心体的蛋白酶体活性至关重要,从而促进了啮齿动物体内活体树突状树突的形成。我们还发现,螺旋-环-螺旋蛋白Id1破坏了S5a / Rpn10与蛋白酶体盖的相互作用,从而抑制了神经体中的中心体蛋白酶体活性和枝晶细化。在一起,我们的发现定义了神经元中心体中特定蛋白酶体库的功能,并确定了哺乳动物脑中S5a / Rpn10的生物学功能。

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