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Magnesium chloride hexahydrate, MgCl2•6H2O

Magnesium chloride hexahydrate

Company: Sigma-Aldrich
Catalog#: 63064
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Rapid Isolation of Total Protein from Arabidopsis Pollen
Author:
Date:
2017-04-20
[Abstract]  Arabidopsis pollen is an excellent system for answering important biological questions about the establishment and maintenance of cellular polarity and polar cell growth, because these processes are amenable to the genetic and genomic approaches that are readily available in Arabidopsis. Given that proteins are the direct executors of a wide variety of cellular processes, it is important to rapidly and efficiently isolate total protein for various protein-based analyses, such as Western blotting, co-immunoprecipitation and mass spectrometry, among others. Here we present a protocol for rapid isolation of total protein from Arabidopsis pollen, which is adapted from our recently published paper (Chang and Huang, 2015). [摘要]  拟南芥花粉是用于回答关于细胞极性和极性细胞生长的建立和维持的重要生物学问题的优秀系统,因为这些方法适用于在中容易获得的遗传和基因组方法, 拟南芥。 鉴于蛋白质是各种细胞过程的直接执行者,重要的是快速有效地分离各种基于蛋白质的分析的总蛋白质,例如Western印迹,共免疫沉淀和质谱等。 在这里,我们提出了一种从拟南芥花粉中快速分离总蛋白的方案,该方法是从我们最近发表的论文(Chang and Huang,2015)中得到改编的。
花粉是性繁殖植物生命周期的关键阶段。花粉萌发和随后的管生长提供了两个非活动精子细胞在开花植物中进行双重受精的通道。花粉通常被用作解决基本细胞生物学问题的示范系统,例如细胞极性和极细胞生长的建立和维持,以及肌动蛋白细胞骨架的结构和功能(Chen等人, ,2009; Qu等人,2015)。通常来自百合和烟草的花粉由于粒度大而被广泛使用,这使得它们在显微镜下容易收集和观察。相比之下,拟南芥花粉小,收集大量花粉以分离足够量的蛋白质以进行下游分析(如Western印迹和质谱法)相对困难。因此,开发快速分离总拟蛋白质拟南芥花粉的方案将有助于相关分析。

In vitro Histone H3 Cleavage Assay for Yeast and Chicken Liver H3 Protease
Author:
Date:
2017-01-05
[Abstract]  Histone proteins are subjected to a wide array of reversible and irreversible post-translational modifications (PTMs) (Bannister and Kouzarides, 2011; Azad and Tomar, 2014). The PTMs on histones are known to regulate chromatin structure and function. Histones are irreversibly modified by proteolytic clipping of their tail domains. The proteolytic clipping of histone tails is continuously attracting interest of researchers in the field of chromatin biology. We can recapitulate H3-clipping by performing in vitro H3 cleavage assay. Here, we are presenting the detailed protocol to perform in vitro H3 cleavage assay. [摘要]  组蛋白受到广泛的可逆和不可逆的翻译后修饰(PTM)(Bannister和Kouzarides,2011; Azad和Tomar,2014)。已知组蛋白上的PTM调节染色质结构和功能。组蛋白不可逆地修饰其尾部结构域的蛋白水解剪切。组蛋白尾巴的蛋白水解剪切不断吸引研究人员在染色质生物学领域的兴趣。我们可以通过在体外实施H3切割测定来概括H3-剪切。在这里,我们提供了详细的方案来进行体外实验。

背景 组蛋白H3剪切是染色质修饰和调节最不了解的机制。预期H3剪切将永久性消除可能影响染色质相关事件的核小体的PTM。此外,切割的组蛋白的命运仍在研究之中,并且已经表明,切割的组蛋白可能在染色质的特定区域被再循环,或者它们被靶向降解。有各种各样的报告描述了不同生物中组蛋白H3的体内剪切,而组蛋白H3特异性剪切的体外测定是有限的。我们需要一种有效和稳健的体外实验来鉴定组蛋白特异性蛋白酶。为此,我们提出了一个可用于检查酵母和鸡肝组织蛋白H3蛋白酶的体外组蛋白H3剪切活性的方案。我们已经优化了测定的温度和pH条件。在我们优化的条件下,发现蛋白酶在所有核心组蛋白中特异性切割组蛋白H3。我们在最近的出版物(Chauhan等人,2016年; Chauhan和Tomar,2016年; Azad和Tomar,2016; ...

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