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Mini gel apparatus

Company: Thermo Fisher Scientific
Catalog#: A25977
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Preparation of Cerebellum Granule Neurons from Mouse or Rat Pups and Evaluation of Clostridial Neurotoxin Activity and Their Inhibitors by Western Blot and Immunohistochemistry
Author:
Date:
2018-07-05
[Abstract]  Cerebellar Granule Neurons (CGN) from post-natal rodents have been widely used as a model to study neuronal development, physiology and pathology. CGN cultured in vitro maintain the same features displayed in vivo by mature cerebellar granule cells, including the development of a dense neuritic network, neuronal activity, neurotransmitter release and the expression of neuronal protein markers. Moreover, CGN represent a convenient model for the study of Clostridial Neurotoxins (CNT), most notably known as Tetanus and Botulinum neurotoxins, as they abundantly express both CNT receptors and intraneuronal substrates, i.e., Soluble N-ethylmaleimide-sensitive factor activating protein receptors (SNARE proteins). Here, we describe a protocol for obtaining a highly pure ... [摘要]  来自产后啮齿动物的小脑颗粒神经元(CGN)已被广泛用作研究神经元发育,生理学和病理学的模型。 CGN体外培养维持成熟小脑颗粒细胞在体内显示的相同特征,包括发育致密的神经炎网络,神经元活动,神经递质释放和神经元的表达 蛋白质标记。 此外,CGN代表了梭菌神经毒素(CNT)研究的便利模型,最着名的是破伤风和肉毒杆菌神经毒素,因为它们大量表达CNT受体和神经元内基质, ie ,可溶性N-乙基马来酰亚胺 - 敏感因子激活蛋白受体(SNARE蛋白)。 在这里,我们描述了从出生后大鼠/小鼠获得高纯度CGN培养物的方案和用CNT中毒的简便方法。 我们还说明了评估CNT活性及其抑制的方便方法。

【背景】梭菌神经毒素(CNT)的大家族由破伤风神经毒素(TeNT)和肉毒杆菌神经毒素(BoNT)的多种变体形成,它们分别是破伤风和肉毒中毒的神经麻痹毒素(Schiavo et al。,2000; Johnson和Montecucco,2008; Rossetto et al。,2014)。 TeNT,七种BoNT血清型(BoNT / A至/ G)及其许多亚型是金属蛋白酶,通过切割SNARE蛋白(可溶性N-乙基马来酰亚胺敏感因子激活蛋白受体),三种必需蛋白质来阻断神经递质的释放而引起神经麻痹。控制突触小泡与突触前质膜的融合(Rossetto et al。,2014; ...

Streptavidin Bead Pulldown Assay to Determine Protein Homooligomerization
Author:
Date:
2017-11-20
[Abstract]  Pulldown assay is a conventional method to determine protein-protein interactions in vitro. Expressing a protein of interest with two different tags allows testing whether both versions can be captured via one of the two tags as homooligomeric complex. This protocol is based on streptavidin bead capture of a biotinylated protein and co-associated Flag-tagged protein using Streptavidin MagBeads. [摘要]  Pulldown分析是一种常规的方法来确定蛋白质在体外的相互作用。 用两种不同的标签表达感兴趣的蛋白质可以检测两种标签是否可以通过两种标签之一作为同低聚体复合物来捕获。 该方案基于使用链霉抗生物素蛋白MagBeads的链霉抗生物素蛋白珠捕获生物素化蛋白质和共结合Flag标记蛋白质。
【背景】淀粉样前体蛋白(APP)可以通过其大的胞外结构域及其跨膜结构域形成同型二聚体,在生物学功能中起重要作用。 目前的方案已被用于表征APP跨膜C-末端99个氨基酸片段(C99)的同二聚化(Yan等人,2017)。 该检测的基本原理如图1所示:链霉亲和素包被的MagBeads可以捕获生物素化的蛋白质,这可以拉下相互作用蛋白质,并通过抗FLAG抗体检测。

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图1.基于MagBeads的pull-down测定的原理在该特定的方案中,使用生物素化的Avi-标记的C99蛋白和相关的C99-TEV位点-rTA-Flag蛋白质。

Protein Expression and Purification of the Hsp90-Cdc37-Cdk4 Kinase Complex from Saccharomyces cerevisiae
Author:
Date:
2017-10-05
[Abstract]  Interactions between Hsp90, its co-chaperone Cdc37 and kinases have been biochemically studied for over three decades and have been shown to be functionally important in organisms from yeast to humans. However, formation of a stable complex for structural studies has been elusive. In this protocol we describe expression and purification of Hsp90-Cdc37-Cdk4 kinase protein complex from Saccharomyces cerevisiae utilizing the viral 2A sequences to titrate the three proteins at similar levels. [摘要]  Hsp90,其伴侣伴侣Cdc37和激酶之间的相互作用已经在三十多年的生物化学研究中被证明在酵母与人类的生物体内在功能上是重要的。 然而,形成一个稳定的结构研究复合物是难以捉摸的。 在该方案中,我们描述了利用病毒2A序列以相似水平滴定三种蛋白质的来自酿酒酵母的Hsp90-Cdc37-Cdk4激酶蛋白复合物的表达和纯化。
【背景】Hsp90分子伴侣与其客体激酶之间的稳定形成复合物已经被证明在体外是难治性的。以前的工作表明,Hsp90的共伴伴Cdc37与昆虫Sf9细胞中的客体激酶的过表达导致Sf9 Hsp90,外源Cdc37和外源激酶(Vaughan等人,2006)之间的稳定复合物。然而,昆虫细胞培养需要特殊的设备,比其他研究较好的表达系统(如细菌和酵母)要难以进行遗传操作,并且显着较慢地生长和克隆。上述蛋白质在E中的共表达。大肠杆菌不产生可溶性激酶/稳定复合物。我们认为,酿酒酵母将具有必要的机制来帮助折叠和促进复合物的形成,并试图通过共同表达这些蛋白质来产生人Hsp90β,人Cdc37和人Cdk4激酶之间的复合物, S上。酵母。为了获得三种蛋白质的化学计量表达,我们利用病毒2A肽,其允许三个蛋白质在一个mRNA上转录,随后在翻译阶段切割。该系统已被用于人类细胞系和兔网状细胞(Kim等人,2011; ...

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