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Sf9 cells

Sf9细胞在Sf-900Sup TM II SFM中的表达

公司名称: Thermo Fisher Scientific
产品编号: 11496015
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Expression and Purification of the Human Cation-chloride Cotransporter KCC1 from HEK293F Cells for Structural Studies
Author:
Date:
2021-04-05
[Abstract]  

Cation-chloride cotransporters (CCCs) mediate the coupled, electroneutral symport of cations such as Na+ and/or K+ with chloride across membrane. Among CCCs family, K-Cl cotransporters (KCC1-KCC4) extrude intracellular Cl- by the transmembrane K+ gradient. In humans, these KCCs play vital roles in the physiology of the nervous system and kidney. However, mechanisms underlying the KCCs specific properties remain poorly understood, partly because purification of membrane proteins is challenging. Here, we present the protocol for purifying the full-length KCC1 from HEK293F cells used in our

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[摘要]  [摘要]阳离子-氯化物共转运蛋白(CCC)介导诸如Na +和/或K +的阳离子与氯离子在膜上的耦合,电中性共价。间幼儿中心家庭,K-CL协同转运蛋白(KCC1-KCC4)抽UDE细胞内氯-通过跨膜ķ +梯度。在人类中,这些KCC在神经系统和肾脏的生理中起着至关重要的作用。然而,特定的KCC性质保持基本机制知之甚少,部分是因为膜蛋白的纯化是具有挑战性的。在这里,我们介绍了从我们最近的出版物中使用的HEK293F细胞中纯化全长KCC1的方案(Liu等人,2019)。该程序可适用于功能和结构研究。

[背景]人类溶质载体12(SLC12 )基因家族编码阳离子的氯化物协同转运蛋白(CCCS)介导Cl组成的电中性同向转运-和阳离子的Na +或(和)K +跨越质膜。根据其转运特性和氨基酸序列定义,CCC可分为几个分支,包括两个Na-K-2Cl协同转运蛋白(NKCC1和NKCC2),一个Na-Cl协同转运蛋白(NCC)和四个K-Cl协同转运蛋白(KCC1-KCC4 )。CCC在细胞体积调节,肾脏盐分重吸收和神经元GABA能调节中起重要作用。CCC的结构,生化和生物物理研究涉及在去污剂溶解状态下蛋白质生产和稳定方面的挑战。杆状病毒转导HEK293F细胞(BacMam)系统是异源表达由Eric ...

Expression and Purification of a Mammalian P2X7 Receptor from Sf9 Insect Cells
Author:
Date:
2017-09-05
[Abstract]  The P2X7 receptor is an extracellular ATP-gated ion channel found only in eukaryotes (Bartlett et al., 2014). Due to its unique properties among P2X receptors, such as formation of a large conductance pore, the P2X7 receptor has been implicated in devastating diseases like chronic pain (North and Jarvis, 2013). However, mechanisms underlying the P2X7 specific properties remain poorly understood, partly because purification of this eukaryotic membrane protein has been challenging. Here we describe a detailed protocol for expressing and purifying a mammalian P2X7 receptor using an ... [摘要]  P2X7受体是仅在真核生物中发现的胞外ATP门控离子通道(Bartlett等,2014)。由于其P2X受体之间的独特性质,例如大电导孔的形成,P2X7受体已经涉及破坏性疾病如慢性疼痛(North和Jarvis,2013)。然而,P2X7特异性属性的机制仍然知之甚少,部分原因是纯化这种真核膜蛋白是一个挑战。在这里,我们描述了使用昆虫细胞 - 杆状病毒系统表达和纯化哺乳动物P2X7受体的详细方案。 P2X7受体在作为GFP融合蛋白的Sf9昆虫细胞中表达,并用含有Triton X-100洗涤剂的缓冲液溶解。然后使用Strep-Tactin亲和层析在含有十二烷基麦芽糖苷的缓冲液中纯化P2X7-GFP融合蛋白。在通过凝血酶酶切割连接的GFP和Strep-标签后,使用大小排阻色谱分离P2X7受体。该方法通常从6L的Sf9培养物产生约2mg的纯化蛋白质。纯化的蛋白质可以用含有15%甘油的缓冲液在4℃下储存至少2个月,并用于各种功能和结构研究(Karasawa和Kawate,2016)。
【背景】P2X7受体是嘌呤能P2X受体家族的七种亚型之一,并且是广泛疾病如神经退行性疾病,癫痫和神经性疼痛的有希望的新型药物靶点(North和Jarvis,2013; Bhattacharya和Biber, ...

In vitro Assay of the Glycosyltransferase Activity of a Heterologously Expressed Plant Protein
Author:
Date:
2014-11-05
[Abstract]  Glycosyltransferases are carbohydrate active enzymes containing catalytic modules involved in catalysing the biosynthesis of glycosidic bonds in oligo- and polysaccharides and glycoconjugates. One of the most comprehensive collections of Carbohydrate Active enZYmes is the CAZy database (http://www.cazy.org) comprising 120,000 glycosyltransferases allocated to 96 families based mainly on sequence homologies of their conserved and catalytically active domains (Cantarel et al., 2009). Interestingly, the glycosyltransferase activities of ... [摘要]  糖基转移酶是含有催化模块的碳水化合物活性酶,其涉及催化寡糖和多糖和糖缀合物中糖苷键的生物合成。 Carbohydrate Active enZYmes最全面的集合之一是CAZy数据库( http://www.cazy.org ) ),其包含分配给96个家族的120,000个糖基转移酶,主要基于其保守和催化活性结构域的序列同源性(Cantarel等人,2009)。有趣的是,仅约1.6%的这些蛋白质的糖基转移酶活性已经通过实验表征(Lombard等人,2014)。近年来,已显示许多家族的膜结合糖基转移酶在植物细胞壁多糖的生物合成中起关键作用(Doblin等人,2010; Scheller和Ulvskov,2010 ; ...

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