| 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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| Drosophila Fecal Sampling
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Author:
Date:
2017-09-20
[Abstract] Fecal sampling is a non-invasive method which raises the possibility to study the development and the changes in the microbial community throughout different time points of a fly population or throughout different treatments. This method allows precise manipulation to trigger the fly’s physiology by nutritional interventions, bacterial infections or other stressors.
As in most other animals, the intestinal microbiota is essential for a healthy fly-life. Because Drosophila only harbors a relative simple bacterial community with a small variety of round about 8 to 10 different species, it is rather easy to build up the microbial community and to investigate microbial changes after treatment.
Another positive effect using the fly’s feces is that bacteria that ...
[摘要] 粪便取样是一种非侵入性方法，提高了在飞行群体的不同时间点或整个不同处理过程中研究微生物群落的发展和变化的可能性。这种方法允许精确的操纵通过营养干预，细菌感染或其他压力源触发苍蝇的生理学。
与大多数其他动物一样，肠道微生物群对健康的飞行生命至关重要。因为果蝇只拥有一个相对简单的细菌群落，有大约8到10个不同种类的小种，很容易建立微生物群落，并在处理后调查微生物的变化。
使用蝇的粪便的另一个积极作用是不是肠微生物群的一部分的细菌，例如Wolbachia，可以直接从分析中排除，因为它们不会排泄。
使用这种方法，生成的数据集可能反映了在简单飞行模型中研究微生物组织相关疾病的一个很好的范例，此外，可以以高通量方法测试药物。
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