| Isolation of Chromatin-bound Proteins from Subcellular Fractions for Biochemical Analysis
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Author:
Date:
2018-10-05
[Abstract] Shuttling of proteins between different cellular compartments controls their proteostasis and can contribute in some cases to regulate their activity. Biochemical analysis of chromatin-bound proteins, such as transcription factors, is often difficult because of their low yield and due to the interference from nucleic acids. This protocol describes a method to efficiently fractionate cells combined with a mechanical (i.e., sonication) or an enzymatic treatment (i.e., benzonase) that facilitates analysis of chromatin-bound protein extracts by Western blot analysis or by protein pull-down assays. This approach can be valuable to enrich a particular protein within a particular subcellular fraction either to study specific post-translational modification patterns or to ...
[摘要] 在不同细胞区室之间穿梭蛋白质控制它们的蛋白质稳态，并且在某些情况下可以有助于调节它们的活性。 染色质结合蛋白（例如转录因子）的生化分析通常是困难的，因为它们的产率低并且由于核酸的干扰。 该协议描述了一种有效分离细胞的方法，结合机械（即，超声处理）或酶处理（即，benzonase），有助于分析染色质结合蛋白提取物 通过蛋白质印迹分析或蛋白质下拉分析。 该方法对于富集特定亚细胞级分内的特定蛋白质以研究特定的翻译后修饰模式或鉴定特定的蛋白质 - 蛋白质相互作用可能是有价值的。
【背景】许多染色质结合蛋白的活性和翻译后调节研究很少，因为在分离它们进行生化分析时存在技术困难。这甚至是转录因子的情况，例如基本的螺旋 - 环 - 螺旋（bHLH）转录因子，其通常在组织或细胞模型中具有稀缺的时间和空间表达模式（Dennis 等。，2018）。当生物材料的量成为研究分子途径的障碍时，协议细化有助于解除技术限制（Gillotin和Guillemot，2016）。在我们最近的研究中，我们努力了解神经元bHLH转录因子Ascl1的蛋白水解是如何在神经元分化的细胞模型中调节的（Gillotin et ...
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| Dictyostelium Cultivation, Transfection, Microscopy and Fractionation
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Author:
Date:
2015-06-05
[Abstract] The real time visualisation of fluorescently tagged proteins in live cells using ever more sophisticated microscopes has greatly increased our understanding of the dynamics of key proteins during fundamental physiological processes such as cell locomotion, chemotaxis, cell division and membrane trafficking. In addition the fractionation of cells and isolation of organelles or known compartments can often verify any subcellular localisation and the use of tagged proteins as bait for the immunoprecipitation of material from cell fractions can identify specific binding partners and multiprotein complexes thereby helping assign a function to the tagged protein. We have successfully applied these techniques to the Dictyostelium discoideum protein TSPOON that is part of an ancient ...
[摘要] 使用更复杂的显微镜，活细胞中荧光标记的蛋白质的实时可视化大大增加了我们对基本生理过程如细胞运动，趋化性，细胞分裂和膜运输过程中关键蛋白质动力学的了解。此外，细胞的分级和分离细胞器或已知的隔室通常可以验证任何亚细胞定位，并且使用标记的蛋白质作为诱饵用于来自细胞部分的物质的免疫沉淀可以鉴定特异性结合配偶体和多蛋白复合物，从而有助于赋予功能标记蛋白。我们已经成功地将这些技术应用于作为古代异构六聚体膜转运复合物的一部分的盘基网柄菌discoideum蛋白TSPOON（Hirst等，2013）。 ...
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| Construction of FWPV Chimaeric MVA
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Author:
Date:
2015-01-05
[Abstract] Construction of chimaeric MVA is a useful tool with which to study gene function of related viruses. The protocol given here describes MVA chimaeras containing genes from Fowlpox virus (FWPV), although this can be applied to DNA derived from other organisms. There are a number of steps required to make the chimaeric MVA: 1) Purification of viral particles; 2) Extraction of DNA from purified viral particles; 3) Assembly of linear recombination templates; 4) Transfection of linear recombination templates; 5) Selection of chimaeric MVA.
Note: This procedure uses live virus, and should be conducted using Good Microbiological Practice, in accordance with international and national biocontainment requirements. This procedure also involves Genetic Modification of microorganisms, and ...
[摘要] 嵌合MVA的构建是研究相关病毒的基因功能的有用工具。 本文给出的方案描述了含有来自鸡痘病毒（FWPV）的基因的MVA嵌合体，尽管这可以应用于来自其他生物体的DNA。 制备嵌合MVA需要许多步骤：1）病毒颗粒的纯化; 2）从纯化的病毒颗粒中提取DNA; 3）装配线性重组模板; 4）线性重组模板的转染; 5）嵌合MVA的选择。
注意：此程序使用活病毒，并应根据国际和国家生物承诺要求使用良好微生物实践进行。 该程序还涉及微生物的遗传修饰，并且在开始前应获得适当的安全批准。
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