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Coomassie Brilliant Blue R-250

Company: Bio-Rad
Catalog#: 1610436
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Biochemical Pulldown of mRNAs and Long Noncoding RNAs from Cellular Lysates Coupled with Mass Spectrometry to Identify Protein Binding Partners
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Date:
2020-06-05
[Abstract]  RNA binding proteins (RBPs) interact with cellular mRNAs, controlling various steps throughout the lifetime of these transcripts, including transcription, cellular transport, subcellular localization, translation and degradation. In addition to binding mRNA transcripts, a growing number of RBPs are shown to bind long noncoding RNAs (lncRNAs), controlling key cellular processes, including gene expression and translation of proteins. Current methodologies aimed at identifying and characterizing protein binding partners of specific RNAs of interest typically rely on tagging of the RNA with affinity aptamers, using in vitro transcribed RNA or immobilized oligonucleotides to capture RNA-protein complexes under native conditions. These assays are coupled with mass spectrometry or ... [摘要]  [摘要] RNA结合蛋白(限制性商业惯例)我Nteract随着细胞mRNA,控制整个这些转录,包括转录,细胞运输,亚细胞定位,翻译和降解。除了寿命结合mRNA转录物,越来越多的各种步骤的限制性商业惯例被证明与长期的非编码RNA(lncRNA )结合,控制关键的细胞进程,包括基因的表达和蛋白质的翻译。目前旨在鉴定和表征感兴趣的特定RNA的蛋白质结合伴侣的方法主要依靠用亲和适体标记RNA。 ,使用体外转录的RNA或固定的寡核苷酸在天然条件下捕获RNA-蛋白质复合物,这些测定方法与质谱或Western Blot分析相结合,以鉴定或/和确认相互作用的蛋白质。 mRNA和大的长非编码RNA的伴侣。oach依赖于特定靶RNA的生化下拉以及细胞裂解液中相互作用的蛋白伴侣与质谱的结合来鉴定新的相互作用蛋白。通过使用与靶RNA杂交的24-48〜20 mer 生物素化DNA 探针,该方法可确保高特异性和最小限度的脱靶结合。这种方法具有可重现性和快速性,可作为发现研究以鉴定与目标RNA结合的蛋白质的基础。

[背景] RNA结合蛋白(RBP)与细胞中的mRNA相互作用形成核糖核蛋白(RNP)复合物,通过影响转录物的加工,亚细胞定位,翻译和稳定性来调节这些转录物的转录后活性(综述见Lunde 等人。,2007; Glisovic ...

Preparation of a Bacteriophage T4-based Prokaryotic-eukaryotic Hybrid Viral Vector for Delivery of Large Cargos of Genes and Proteins into Human Cells
Author:
Date:
2020-04-05
[Abstract]  A viral vector that can safely and efficiently deliver large and diverse molecular cargos into cells is the holy grail of curing many human diseases. Adeno-associated virus (AAV) has been extensively used but has a very small capacity. The prokaryotic virus T4 has a large capacity but lacks natural mechanisms to enter mammalian cells. Here, we created a hybrid vector by combining T4 and AAV into one nanoparticle that possesses the advantages of both. The small 25 nm AAV particles are attached to the large 120 nm x 86 nm T4 head through avidin-biotin cross-bridges using the phage decoration proteins Soc (small outer capsid protein) and Hoc (highly antigenic outer capsid protein). AAV thus “piggy-backed” on T4 capsid, by virtue of its natural ability to enter many types of human cells ... [摘要]  [摘要 ] 一种病毒载体,可以安全有效地将大量多样的分子货物运送到细胞中 是治愈许多人类疾病的圣杯。腺伴随病毒(AAV)已被广泛使用,但容量很小。T4原核病毒容量大,但缺乏进入哺乳动物细胞的天然机制。在这里,我们通过将T4和AAV结合到一个具有两者优势的纳米颗粒中,创建了一种杂交载体。使用噬菌体修饰蛋白Soc(小的外衣壳蛋白)和Hoc(高度抗原化的外衣壳蛋白),通过亲和素-生物素交叉桥将25 nm的AAV小颗粒连接到120 nm x 86 nm的大T4头上。因此,AAV凭借其固有的进入多种类型人体细胞的自然能力,可以“背负”于T4衣壳上,从而有效地充当了“驱动器”,以运送与T4头相关的大型货物。这种独特的T4-AAV杂交载体方法可为将来开发新型疗法铺平道路。

[背景 ] 已经有新的和有效的递送载体能够运输基因和蛋白质的大货物进入人类细胞,以刺激生产治疗性生物分子的和/或修复的细胞和遗传缺陷的迫切需要。这样的载体将允许将快速出现的技术(例如CRISPR,CAR T细胞等)转化为用于大规模应用以及个性化医学的疗法(Stewart 等,2016)。

将具有不同特性的纳米粒子组装到杂化复合物中是开发新型功能材料的有力策略,因为这些杂化复合物显示出集体和协作的属性,其中某些属性可能与单个粒子所显示的属性不同(Ghosh 等人,2012; ...

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