作者:Anilkumar Kore、Muthian Shanmugasundaram
DOI:10.2174/157017809789869483
日期:2009.10.1
We describe synthesis of a chain-terminating mRNA cap dinucleotide m2 7, 2OG[5]ppp[5]m7G analog. A new dinucleotide cap analog was synthesized with methyl groups on the both N7 guanine moieties, as well as the 2-OH of one of the ribose moiety is reported. The biological validation of triple methylated cap analog was done with respect to their effects on capping efficiency, yield of RNAs during in vitro transcription, and the translational activity of these RNAs upon transfection into HeLa cells. The RNA capped with the trimethylated analog (m2 7,2OG[5]ppp[5]m7G) was translated the most efficiently, with ∼ 2.5 -fold more activity than the conventional cap (m7G[5]ppp[5]G).
我们描述了一种链终端 mRNA 盖帽二核苷酸 m2 7、2OG[5]ppp[5]m7G 类似物的合成。报告还合成了一种新的二核苷酸帽类似物,其两个 N7 鸟嘌呤分子上都有甲基,其中一个核糖分子的 2-OH 也有甲基。对三甲基化帽类似物进行了生物学验证,研究了它们对封帽效率、体外转录过程中 RNA 产量以及转染 HeLa 细胞后这些 RNA 的翻译活性的影响。用三甲基化类似物(m2 7,2OG[5]ppp[5]m7G)封端的 RNA 翻译效率最高,其活性是传统封端(m7G[5]ppp[5]G)的 2.5 倍。