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Swing-bucket rotor with 50 ml tube adaptors

Company: Eppendorf
Catalog#: A-4-81
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Chromatin Immunoprecipitation (ChIP) to Assess Histone Marks in Auxin-treated Arabidopsis thaliana Inflorescence Tissue
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Date:
2020-12-05
[Abstract]  Chromatin immunoprecipitation coupled with quantitative PCR (ChIP-qPCR) or high-throughput sequencing (ChIP-seq) has become the gold standard for the identification of binding sites of DNA binding proteins and the localization of histone modification on a locus-specific or genome-wide scale, respectively. ChIP experiments can be divided into seven critical steps: (A) sample collection, (B) crosslinking of proteins to DNA, (C) nuclear extraction, (D) chromatin isolation and fragmentation by sonication, (E) immunoprecipitation of histone marks by appropriate antibodies, (F) DNA recovery, and (G) identification of precipitated protein-associated DNA by qPCR or high-throughput sequencing. Here, we describe a time-efficient protocol that can be used for ChIP-qPCR experiments to study the ... [摘要]  [摘要]染色质免疫沉淀与定量PCR(ChIP -qPCR)或高通量测序(ChIP-seq )结合已成为鉴定DNA结合蛋白结合位点和在特定基因座上定位组蛋白修饰的金标准。或全基因组规模。ChIP实验可分为七个关键步骤:(A)样品收集,(B)蛋白质与DNA交联,(C)核提取,(D)染色质分离和f 超声处理的碎片化;(E)通过适当的抗体对组蛋白标记的免疫沉淀;(F)DNA的回收;(G)通过qPCR或高通量测序鉴定沉淀的蛋白质相关DNA。在这里,我们描述了一种可用于ChIP -qPCR实验的省时协议,以研究模型植物拟南芥幼花序中组蛋白修饰的定位。


[背景]真核基因组中的染色体中,其与组蛋白DNA结合形成染色质组织的。组蛋白与DNA之间的紧密相互作用阻碍了DNA与其他因素的可及性。因此,组蛋白相对于重要调控DNA序列的位置和组蛋白-DNA接触的强度可以隐藏或暴露提供另一层基因调控的基因。在染色质中,组蛋白和DNA均可被化学修饰(Zhou等,2010 ;Schübeler ,2015)。根据修饰的物理性质,染色质状态可以阻止或增强基础基因的转录(Kouzarides ,2007; Yang等,2014; Wu等,2015)。在植物中,染色质的表观遗传状态已被证明是响应发育或环境刺激的基因表达的关键决定因素(Yang等人,2014 ; Wu等人,2015 ; ...

Reprogram Murine Epiblast Stem Cells by Epigenetic Inhibitors
Author:
Date:
2017-03-05
[Abstract]  Pluripotent stem cells in the naïve state are highly useful in regenerative medicine and tissue engineering. A robust reprogramming of the primed murine Epiblast Stem Cells (EpiSCs) to naïve pluripotency is feasible via chemical-only approach. This protocol described a method to reprogram murine EpiSCs by MM-401 treatment, which blocks histone H3K4 methylation by MLL1/KMT2A. [摘要]  初生状态下的多能干细胞在再生医学和组织工程中非常有用。 通过化学方法,将引发的鼠上皮细胞干细胞(EpiSCs)的鲁棒重新编程成为初始多能性是可行的。 该方案描述了通过MM-401处理重编程小鼠EpiSCs的方法,其通过MLL1 / KMT2A阻断组蛋白H3K4甲基化。

背景 以前关于EpiSC重编程的方案取决于转录因子的遗传操作或信号通路的化学抑制,尽管效率和持续时间不同。 基于最近将MLL1复合物与初始状态联系起来的机制研究,该方案提供了一种直观而有力的方法,通过靶向MLL1介导的H3K4甲基化和随后的转录调节来恢复EpiSC的初始多能性。 重编程效率明显高于以前公布的方法,在两周内达到50%的转化率。

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