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Ultrasonic Processor for Small Volume Applications

超声波液体处理器(Vibra-Cell TM)

公司名称: Sonics & Materials
产品编号: VCX 130
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Producing GST-Cbx7 Fusion Proteins from Escherichia coli
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Date:
2017-06-20
[Abstract]  This protocol describes the production of GST-Cbx7 fusion proteins from E. coli, originally developed in the recent publication (Zhen et al., 2016). The pGEX-6P-1-GST plasmids encoding the Cbx7 variants were transformed into BL21 competent cells. The fusion protein production was induced by isopropyl-beta-D-thiogalactopyranoside and they were purified by Glutathione Sepharose 4B. This protocol can be adapted for the purification of other proteins. [摘要]  该方案描述了最近在最近的出版物(Zhen等,2016)中开发的大肠杆菌GST-Cbx7融合蛋白的生产。 将编码Cbx7变体的pGEX-6P-1-GST质粒转化到BL21感受态细胞中。 通过异丙基-β-D-硫代吡喃半乳糖苷诱导融合蛋白的产生,并用谷胱甘肽琼脂糖4B纯化。 该方案可以适用于其他蛋白质的纯化。
【背景】Polycomb组(PcG)蛋白通过调节高阶染色质结构调节基因表达(Kerppola,2009; Simon和Kingston,2013)。 PcG蛋白通常存在于两种主要复合物Polycomb镇压复合物(PRC)1和2(Kerppola,2009; Simon和Kingston,2013)中。 PRC2是甲基转移酶,其催化组蛋白H3(H3K27me2 / 3)上赖氨酸27的二甲基和三甲基化(Cao等,2002); PRC1是在赖氨酸119(H2AK119Ub)上单核苷酸组氨酸H2A的泛素连接酶(Wang等,2004)。哺乳动物PRC1复合物进一步分为典型和变体PRC1(Gao等,2012,Tavares等,2012)。规范PRC1由每个Ring1(Ring1A / Ring1B),Pcgf(Mel18 / Bmi1),Phc(Phc1 / 2/3)和Cbx(Cbx2 / 4/6/7/8)蛋白之一组成。 ...

Expression and Purification of Mini G Proteins from Escherichia coli
Author:
Date:
2017-04-20
[Abstract]  Heterotrimeric G proteins modulate intracellular signalling by transducing information from cell surface G protein-coupled receptors (GPCRs) to cytoplasmic effector proteins. Structural and functional characterisation of GPCR–G protein complexes is important to fully decipher the mechanism of signal transduction. However, native G proteins are unstable and conformationally dynamic when coupled to a receptor. We therefore developed an engineered minimal G protein, mini-Gs, which formed a stable complex with GPCRs, and facilitated the crystallisation and structure determination of ... [摘要]  异源三聚体G蛋白通过将细胞表面G蛋白偶联受体(GPCR)的信息转导至细胞质效应蛋白来调节细胞内信号传导。 GPCR-G蛋白复合物的结构和功能表征对于完全破译信号转导机制是重要的。然而,当与受体偶联时,天然G蛋白质是不稳定的并具有构象的动力学。因此,我们开发了一种工程化的最小G蛋白,其与GPCR形成稳定的复合物,促进了人腺苷A 2A受体的结晶和结构测定(A 2AR)的活性构象。 Mini G蛋白是各种应用中潜在有用的工具,包括表征GPCR药理学,结合亲和力和动力学实验,激动剂药物发现和GPCR-G蛋白复合物的结构测定。在这里,我们描述了一个用于表达和纯化mini-G 的详细方案。

我们最近报告了一种工程化的最小G蛋白质(Carpenter和Tate,2016)的开发,其促进了人腺苷A 2A受体的结晶( A 2 R 2)其活性构象(Carpenter等人,2016; Carpenter和Tate,2017)。不同于需要在真核系统中表达的异源三聚体G蛋白质,在大肠杆菌(大肠杆菌)中高度表达微型G蛋白,并且可以可以容易地纯化,每升培养物的产量为50-100mg的mini-G 。在这里,我们描述了早先在Carpenter和Tate(2016)中描述的可以用于前面描述的任何一种迷你G蛋白构建体的表达和纯化的逐步方案(Carpenter等人, ...

PKC-θ in vitro Kinase Activity Assay
Author:
Date:
2016-10-20
[Abstract]  Protein kinase C-θ (PKC-θ), a member of the Ca2+-independent PKC subfamily of kinases, serves as a regulator of T cell activation by mediating the T cell antigen receptor (TCR)- and coreceptor CD28-induced activation of the transcription factors NF-κB and AP-1 and, to a lesser extent, NFAT, and, subsequently, interleukin 2 (IL-2) production and T cell proliferation. In T cells, TCR and CD28 stimulation-induced activation of PKC-θ is the integrated result of diacylglycerol-mediated membrane recruitment, GLK-mediated phosphorylation at activation loop, CD28, Lck, and ... [摘要]  Sumoylation控制许多细胞过程。蛋白激酶C-θ(PKC-θ)是激酶的Ca 2+超家族PKC亚家族的成员,通过介导T细胞抗原受体(TCR)作为T细胞活化的调节剂, - 和共受体CD28诱导的转录因子NF-κB和AP-1的活化,以及较小程度的NFAT,以及随后的白细胞介素2(IL-2)产生和T细胞增殖。我们最近证明了TCR诱导的PKC-θ的sumoylation是其在T细胞中的功能所必需的(Wang等人,2015)。在这里我们描述分析TCR诱导的过表达或内源性PKC-θ的sumoylation的方法,这是通过免疫沉淀PKC-θ进行,然后用抗SUMO1抗体进行免疫印迹。

[背景] ...

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