T突变。O8G修饰广泛存在于mRNA和非编码RNA中。mRNA上的O8G修饰会抑制翻译,miRNA上的O8G修饰可改变miRNA对靶mRNA识别,rRNA"/>
8-氧代鸟嘌呤修饰(O8G modification)8-氧代鸟嘌呤(O8G)修饰是RNA中鸟嘌呤碱基被活性氧氧化后产生的一种修饰,使鸟嘌呤(G)可与腺嘌呤(A)错配,导致转录过程中G>T突变。O8G修饰广泛存在于mRNA和非编码RNA中。mRNA上的O8G修饰会抑制翻译,miRNA上的O8G修饰可改变miRNA对靶mRNA识别,rRNA和tRNA上的O8G修饰会抑制蛋白质合成(图1)。O8G识别蛋白(Reader)包括AUF1和YBX1,负责识别O8G并发挥作用。 8-Oxoguanine (O8G) modification is a type of modification that occurs when guanine (G) bases in RNA are oxidized by reactive oxygen species, enabling G to mismatch with adenine (A) and leading to G>T mutations during transcription. O8G modification is widely present in mRNA and non-coding RNAs. O8G modification on mRNA inhibits translation, while O8G modification on miRNA alters miRNA recognition of target mRNA. O8G modification on rRNA and tRNA represses protein synthesis (Fig. 1). O8G recognition proteins (Readers), including AUF1 and YBX1, are responsible for recognizing O8G and exerting functions.
图1 O8G修饰机制示意图1 Fig.1 Schematic diagram of molecular mechanisms for O8G modification1 检测方法(Methods)
应用(Application) 1. 确定靶RNA O8G修饰(Identification of target RNA O8G modification); 2. RNA修饰测序(Sequencing of modified RNAs)。 客户提供的材料与信息(Materials and information provided by customers): 1、目的RNA信息(Target RNA information); 2、细胞样本(Cells):不低于2×10^7个细胞(No less than 2×10^7 cells); 3、组织样本(Tissues):不低于1g(No less than 1g)。 参考文献(Reference) 1 Hahm, J. Y., Park, J., Jang, E. S. & Chi, S. W. 8-Oxoguanine: from oxidative damage to epigenetic and epitranscriptional modification. Exp Mol Med 54, 1626-1642 (2022). https://doi.org/10.1038/s12276-022-00822-z |