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公司名称: Sonics & Materials
产品编号: 630-0435
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Producing GST-Cbx7 Fusion Proteins from Escherichia coli
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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。 ...

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