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EM-1 EconoTM UV Monitor

EM-1 EconoTM UV Monitor

Company: Bio-Rad Laboratories
Catalog#: Model EM-1
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Polysome Analysis
Author:
Date:
2017-03-20
[Abstract]  Polysome analysis is a method to separate mRNAs from a cell into actively translating and non-translating fractions depending on their association with polysomes. By this protocol, cell lysates are fractionated by sucrose density gradient ultracentrifugation. Free mRNA fraction and various ribosomal fractions, such as 40S, 60S, monosomes and polysomes are collected by fractionation. Association of particular mRNAs with these fractions is detected by reverse transcription – PCR to investigate the translational state of the mRNA. [摘要]  多聚赖氨酸分析是一种将mRNA从细胞分离为主动翻译和非翻译部分的方法,这取决于它们与多核糖体的关联。通过该方案,通过蔗糖密度梯度超速离心分离细胞裂解物。通过分级收集游离mRNA级分和各种核糖体级分,例如40S,60S,单体和多核糖体。通过逆转录PCR检测特异性mRNA与这些级分的关联,以研究mRNA的翻译状态。

背景 细胞mRNA在任何时间点分布到主动翻译和非翻译池中,并可响应于各种刺激而在这些池之间动态地重新分布。主动翻译的mRNA具有较高数量的与它们相关的核糖体,与mRNA相关的核糖体数量是mRNA的翻译状态的量度。因此,从细胞中分离核糖体时,会在多核糖体组分中发现主要转录的mRNA,而在游离mRNA部分或与40S核糖体亚基相关的非翻译/不良翻译mRNAs。因此,多聚赖氨酸分析是根据其与多核糖体的关联将mRNA从细胞分离为主动翻译和非翻译部分的方法(Ray et al。,2009; Poria等人, >。,2016)。可以通过RT-PCR检测单个mRNA与翻译/非翻译级分的关联,而通过RNA测序或微阵列分析可以鉴定mRNA的整个翻译或非翻译池。

A Ribosome Footprinting Protocol for Plants
Author:
Date:
2016-11-05
[Abstract]  Ribosome footprinting, or Ribo-seq, has revolutionized the studies of translation. It was originally developed for yeast and mammalian cells in culture (Ingolia et al., 2009). Herein, we describe a plant-optimized hands-on ribosome footprinting protocol derived from previously published procedures of polysome isolation (Ingolia et al., 2009; Mustroph et al., 2009) and ribosome footprinting (Ingolia et al., 2009; Ingolia et al., 2013). With this protocol, we have been able to successfully isolate and analyze high-quality ribosomal footprints from different stages of in vitro grown Arabidopsis thaliana plants (dark-grown seedlings [Merchante et al., 2015] and 13-day-old plantlets in plates and plants grown in liquid ... [摘要]  核糖体足迹或Ribo-seq,彻底改变了翻译研究。它最初是为培养中的酵母和哺乳动物细胞开发的(Ingolia等人,2009)。本文中,我们描述了来自先前公开的多核糖体分离程序的植物优化的亲手核糖体印迹方案(Ingolia等人,2009; Mustroph等人,2009 )和核糖体印迹(Ingolia等人,2009; Ingolia等人,2013)。使用该协议,我们能够成功地分离和分析来自体外生长的拟南芥植物(黑暗生长的幼苗)的不同阶段的高质量核糖体印迹[Merchante < ,以及在液体培养物中生长的板和植物中的13天龄小植物[未发表的结果])。

[背景] 翻译在调节基因活性中的中心作用早已被公认,但是在响应于特定刺激的全基因组翻译定量变化的系统探索最近才变得技术上可行。最初为培养中的酵母和哺乳动物细胞开发的核糖体印迹技术(通常称为Ribo-seq)已经彻底改变了翻译调节和基因表达的研究,因为其允许确定核糖体在基因组 - ...

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