Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, 119991 Moscow, Russia.
Engelhardt Institute of Molecular Biology, The Russian Academy of Sciences, 119991 Moscow, Russia.
Methods. 2019 Jun 1;162-163:54-59. doi: 10.1016/j.ymeth.2019.06.010. Epub 2019 Jun 13.
Classical toeprinting is generally used to determine the position of ribosomes on mRNA; however, it has several disadvantages. We describe a fluorescent toeprinting assay that enables easier identification of ribosomal complexes bound to mRNA in vitro. The procedure involves the use of stable and safe fluorescently labeled oligonucleotides for reverse transcription reactions as primers, followed by the analysis of cDNA products using an automatic sequencer. This procedure allows the multiplexing and simultaneous analysis of a large number of samples. Over the past ten years, fluorescent toeprinting was applied to determine the activities of eukaryotic release factors and additional proteins involved in translation termination, to study the dynamics of translation initiation and elongation complexes, and to quantitatively evaluate the observed ribosomal complexes. Because of the simplicity and small amounts of material required, fluorescent toeprinting provides a highly scalable and versatile tool to study ribosomal complexes.
经典的足迹印迹分析通常用于确定核糖体在 mRNA 上的位置;然而,它有几个缺点。我们描述了一种荧光足迹印迹分析方法,可更轻松地鉴定体外与 mRNA 结合的核糖体复合物。该程序涉及使用稳定且安全的荧光标记寡核苷酸作为反转录反应的引物,然后使用自动测序仪分析 cDNA 产物。该程序允许对大量样品进行多路复用和同时分析。在过去的十年中,荧光足迹印迹分析已被用于确定真核释放因子和参与翻译终止的其他蛋白质的活性,研究翻译起始和延伸复合物的动力学,并定量评估观察到的核糖体复合物。由于所需的材料简单且数量少,荧光足迹印迹分析为研究核糖体复合物提供了一种高度可扩展且多功能的工具。