小分子RNA- sma rna
小分子RNA--small RNA
什么是干扰小RNA? mirnA(微小RNA): MicroRNAs (miRNAs)即微小RNA是在所有真核类中发 的平均长度为22nt的小分子RNA. mi rnas产生于 mRNA pre-mRNA),可与靶mRNA配对并抑制mRNA的翻译 或促使其降解,具有转录后调控基因表达的功能人 类基因组中约有1000种mRNA,可影响60%的基因的表 达与调控 SiRNA(小RNA): mall interfering RNA (siRNA), sometimes known as short interfering rna or silencing rna, is a class of double-stranded RNA molecules, 20-25 nucleotides in length, that play a variety of roles in biology. Most notably, sirNa is involved in the rna interference(RNAi) pathway, where it interferes with the expression of a specific gene. See:http:/en.wikipedia.org/wiki/smallinterferingrna
什么是干扰小RNA? miRNA(微小RNA): MicroRNAs (miRNAs) 即微小RNA是在所有真核类中发现 的平均长度为22nt的小分子RNA. miRNAs 产生于前体 mRNA(pre-mRNA), 可与靶mRNA配对并抑制mRNA的翻译 或促使其降解, 具有转录后调控基因表达的功能. 人 类基因组中约有1000种miRNA, 可影响60%的基因的表 达与调控. siRNA(小RNA): Small interfering RNA (siRNA), sometimes known as short interfering RNA or silencing RNA, is a class of double-stranded RNA molecules, 20-25 nucleotides in length, that play a variety of roles in biology. Most notably, siRNA is involved in the RNA interference (RNAi) pathway, where it interferes with the expression of a specific gene. See: http://en.wikipedia.org/wiki/Small_interfering_RNA
干扰小RNA的种类 有4大类干扰小RNA( (small interfering RNa) D)miRNA, Micro-interfering rna 2)SiRNA, Short-interfering RNA 3) piRNA, Piwi-interacting RNa,仅限动物 4)2 IU RNA,线虫
干扰小RNA的种类 有4大类干扰小RNA (small interfering RNA): 1) miRNA, Micro-interfering RNA 2) siRNA, Short-interfering RNA 3) piRNA, Piwi-interacting RNA, 仅限动物 4) 21U RNA, 线虫
microrNa
microRNA
microrNA是如何发现的? 殊途同归 1)植物转基因沉默 2)真菌转基因沉默 3)线虫RNA注射实验 4)线虫发育突变研究 4个独立的研究均发现RNA诱导 内源基因沉默
microRNA是如何发现的? 殊途同归: 1) 植物转基因沉默 2) 真菌转基因沉默 3) 线虫RNA注射实验 4) 线虫发育突变研究 4个独立的研究均发现RNA诱导 内源基因沉默