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N,N,N',N'-Tetramethylethylenediamine

N,N,N'',N''-四甲基乙二胺

Company: Sigma-Aldrich
Catalog#: T22500
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Analyses of Root-secreted Acid Phosphatase Activity in Arabidopsis
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Date:
2017-04-05
[Abstract]  Induction and secretion of acid phosphatase (APase) is a universal adaptive response of higher plants to low-phosphate stress (Tran et al., 2010). The intracellular APases are likely involved in the remobilization and recycling of phosphate (Pi) from intracellular Pi reserves, whereas the extracellular or secreted APases are believed to release Pi from organophosphate compounds in the rhizosphere. The phosphate starvation-induced secreted APases can be released into the rhizosphere or retained on root surfaces (root-associated APases). In this article, we describe the protocols for analyzing root-secreted APase activity in the model plant Arabidopsis thaliana (Arabidopsis). In Arabidopsis, the activity of both root-associated APases and APases that are ... [摘要]  酸性磷酸酶(APase)的诱导和分泌是高等植物对低磷酸盐胁迫的普遍适应性反应(Tran et al。,2010)。细胞内APase可能参与磷酸盐(Pi)从细胞内Pi储备的再利用和再循环,而细胞外或分泌的APase被认为从根际中的有机磷酸盐化合物中释放出Pi。磷酸盐饥饿诱导的分泌的APase可以释放到根际中或保留在根表面(根相关的APase)上。在本文中,我们描述了在拟南芥(Arabidopsis thaliana)(拟南芥)中分析根分泌的APase活性的方案。在拟南芥中,释放到根际的根系相关APase和APase的活性可以基于它们切割合成底物,释放黄色产物的对硝基苯基磷酸(pNPP)的能力来定量,对硝基苯酚(pNP)(Wang等,2011和2104)。根系相关的APase活性也可以通过将显色底物5-溴-4-氯-3-吲哚基 - 磷酸酯(BCIP)施用到根表面来直接显现(Lloyd等人,2001; Tomscha et al。 ,2004; Wang等人,2011和2014),而释放到根际中的APase的同功酶可以使用凝胶内测定法(Trull和Deikman,1998; Tomscha等人,2004; Wang等人, 2011年和2014年)。之前已经描述了用于分析拟南芥细胞内APase活性的方案(Vicki和William,2013)。
【背景】磷酸盐(Pi)是植物通过根系发生磷的主要形式,大多数土壤中的Pi水平较低,导致Pi饿。为了应对这种营养压力,植物引发了一系列适应性反应,增加了其生存和增长。 ...

Individual-nucleotide-resolution UV Cross-linking and Immunoprecipitation (iCLIP) of UPF1
Author:
Date:
2014-04-05
[Abstract]  The fate of mRNA, in particular its stability, localization and rate of translation is regulated by RNA binding proteins assembling to messenger ribonucleoprotein (mRNP) complexes. To investigate the transcriptome-wide RNA binding sites of UPF1, the core factor of nonsense-mediated mRNA decay (NMD), we performed individual-nucleotide-resolution UV cross-linking and immunoprecipitation (iCLIP) (Zund et al., 2013) followed by high-throughput sequencing. The presented protocol is optimized to investigate the RNA-binding sites of UPF1 and is based on previously described studies (Konig et al., 2010; Konig et al., 2011; Hafner et al., 2010). We want to thank the Group of Mihaela Zavolan (Swiss Institute of Bioinformatics, Basel, Switzerland) and Jernej Ule ... [摘要]  mRNA的命运,特别是其稳定性,定位和翻译速率由装配到信使核糖核蛋白(mRNP)复合物的RNA结合蛋白调节。 为了研究无义介导的mRNA衰变(NMD)的核心因子UPF1的转录组范围的RNA结合位点,我们进行单个核苷酸分辨率的UV交联和免疫沉淀(iCLIP)(Zund等,/em>,2013),然后进行高通量测序。 优化所提出的方案以研究UPF1的RNA结合位点并且基于先前描述的研究(Konig等人,2010; Konig等人,2011; Hafner等人,2010)。 我们要感谢Mihaela Zavolan(瑞士巴塞尔瑞士生物信息学研究所)和Jernej Ule(英国剑桥的分子生物学医学研究委员会实验室)组织这些实验的技术支持。

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