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PageBlueTM Protein Staining Solution

Company: Thermo Fisher Scientific
Catalog#: 24620
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Purification of Soluble Recombinant Human Tau Protein from Bacteria Using Double-tag Affinity Purification
Author:
Date:
2018-11-20
[Abstract]  Dysfunction of the microtubule-associated protein Tau (encoded by the MAPT gene) has been implicated in more than twenty neurodegenerative diseases, including Alzheimer’s. As such, the physiological and disease-relevant functions of Tau have garnered great interest in the research community. One barrier hampering investigations into the functions of Tau and the generation of pharmacological agents targeting Tau has been the difficulty of obtaining soluble Tau protein in purified form. Here, we describe a protocol that uses dual affinity tag purification to selectively purify soluble recombinant Tau protein from bacteria that is functionally active for downstream applications including immunization, microtubule binding assays, and protein-protein interaction studies. [摘要]  微管相关蛋白Tau(由 MAPT 基因编码)的功能障碍已经涉及20多种神经退行性疾病,包括阿尔茨海默病。 因此,Tau的生理和疾病相关功能引起了研究界的极大兴趣。 妨碍对Tau功能的研究和产生靶向Tau的药理学试剂的一个障碍是难以获得纯化形式的可溶性Tau蛋白。 在这里,我们描述了一种方案,该方案使用双亲和标签纯化从细菌中选择性纯化可溶性重组Tau蛋白,所述细菌对于下游应用具有功能活性,包括免疫,微管结合测定和蛋白质 - 蛋白质相互作用研究。
【背景】Tau传统上被定义为微管结合蛋白;然而,在人类疾病中,Tau可以与轴突微管分离并错误定位到其他神经元区室,包括体细胞,树突和突触,其中与非微管蛋白和结构的相互作用驱动神经元功能障碍(Iqbal et al。 ,2016; Wang和Mandelkow,2016; Zhou et al。,2017; McInnes et al。,2018)。尽管神经原纤维缠结形式的Tau聚集体通常存在于死后患病的脑组织中,但研究表明,可溶性Tau,而不是聚集的Tau,是神经元功能障碍的主要原因(Crimins et al。,2012 ; Polydoro et al。,2014; Koss et al。,2016)。因此,研究Tau在疾病中的可溶性功能,例如鉴定蛋白质 - ...

BMV Propagation, Extraction and Purification Using Chromatographic Methods
Author:
Date:
2018-07-20
[Abstract]  Brome mosaic virus (BMV) is a well-known plant virus representing single-stranded RNA (ssRNA) positive-sense viruses. It has been widely used as a model in multiple studies concerning plant virus biology, epidemiology and the application of viral capsids in nanotechnology. Herein, we describe a method for BMV purification based on ion-exchange and size-exclusion chromatography. The presented method is of similar efficiency to previously described protocols relying on differential centrifugation and can easily be scaled up. The resulting BMV capsids are stable and monodisperse and can be used for further applications. [摘要]  雀麦花叶病毒(BMV)是众所周知的植物病毒,代表单链RNA(ssRNA)正义病毒。 它已被广泛用作植物病毒生物学,流行病学和病毒衣壳在纳米技术中的应用的多项研究中的模型。 在本文中,我们描述了基于离子交换和尺寸排阻色谱的BMV纯化方法。 所提出的方法与先前描述的依赖于差速离心的方案具有相似的效率,并且可以容易地按比例放大。 得到的BMV衣壳是稳定的并且是单分散的,并且可以用于进一步的应用。

【背景】纳米技术要克服的关键挑战之一是制定有效的和组织特异性的药物递送方法。植物病毒和病毒样颗粒(VLP)具有生物相容性和可生物降解性,不含对人类或动物健康有害的病原体,是合成药物载体的安全替代品,通常会激活免疫系统的不良反应或积聚在免疫系统中。身体到毒性水平。最后,病毒衣壳的生产相对便宜且快速(Ren et al。,2007; Arcangeli et al。,2014)。

Bromoviridae 家族的雀麦花叶病毒(BMV)是用作纳米颗粒载体的良好候选物,因为它显示出所有上述特征并且是研究最多的植物病毒之一(Figlerowicz,2000; Alejska et al。,2005; Urbanowicz et al。,2005; Wierzchoslawski et al。,2006; Kao vet al。 ...

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