RulesofsiRNAdesignforRNAinterference(RNAi)

General GuidelinessiRNA targeted sequence is usually 21 nt in length.Avoid regions within 50-100 bp of the start codon and the termination codonAvoid intron regionsAvoid stretches of 4 or more bases such as AAAA, CCCCAvoid regions with GC content <30% or > 60%.Avoid repeats and low complex sequenceAvoid single nucleotide polymorphism (SNP) sitesPerform BLAST homology search to avoid off-target effects on other ......阅读全文

Rules-of-siRNA-design-for-RNA-interference-(RNAi)

General GuidelinessiRNA targeted sequence is usually 21 nt in length.Avoid regions within 50-100 bp of the start codon and the termination codonAvoid

The-TRC-shRNA-Design-Methods-and-Rules

OverviewWe design shRNA molecules with an algorithm. Our algorithm uses several criteria to rank potential 21mer targets within each human and mouse R

siRNA-Design-Guidelines

Using siRNA for gene silencing is a rapidly evolving tool in molecular biology. There are several methods for preparing siRNA, such as chemical synthe

RNAi片段siRNA设计原则

RNAi target selection rules:Targeted regions on the cDNA sequence of a targeted gene should be located 50-100 nt downstream of the start codon (ATG).S

The-TRC-shRNA-Design-Methods-and-Rules2

Score the Candidates Sequences for SpecificityWe are forced to balance the prediction of knockdown efficiency against the desire to minimize interacti

Northern-protocol(RULES-FOR-RNA-WORK)

1.         Wear gloves at all time including filling pipet tip in racks, filling jars with Eppendorf tubes, and weighing chemicals to prepare solution

BLOCKiT-RNAi-Designer

Allows you to design synthetic siRNA, Stealth RNA, or shRNA molecules from nucleotide target sequences, or convert an siRNA molecule sequence into a S

RNA干扰技术(RNA-interference,RNAi)

1995年,康乃尔大学的Su Guo博士在试图阻断秀丽新小杆线虫(C. elegans)中的par-1基因时,发现了一个意想不到的现象。她们本是利用反义RNA技术特异性地阻断上述基因的表达,而同时在对照实验中给线虫注射正义RNA(sense RNA)以期观察到基因表达的增强。但得到的结果

RNA干涉(RNA-Interference,RNAi)(2)

早期的 RNAi 技术可用在研究与胚胎发育相关基因的功能上,但是由于细胞分裂造成 dsRNA 的稀释,使得这种方法在研究成体的基因功能时有一定的局限性。为弥补早期 RNAi 技术的不足,Tavernarakis 等将 RNAi 技术做了一些改进及更动,将目的基因之标的序列以反向重复的方式,由

RNA干涉(RNA-Interference,RNAi)(1)

基因沉默(gene silencing)是生物体内特定基因由于种种原因不表达的遗传现象。一方面,基因沉默是生物遗传操作创造新的遗传修饰生物(genetically modified organisms)的障碍,另一方面,它又是植物抵抗外来核酸入侵(如病毒)的一种反应,为植物抗病毒的遗传育

反义技术——RNA干扰(RNA-interference,RNAi)

最近由于RNA干扰(RNA interference,RNAi)的发现使反义领域的研究增多。这种自然发生的现象最早是在秀丽线虫中发现的(1),是序列特异性地使转录后的基因沉默的有力机制。由于最近两年在RNAi领域取得的进步,已经有许多这方面的综述发表(2-4)。RNA干扰是由长的双链 RNA

RNA干扰(RNA-interference,RNAi)基础知识(1)

Rnai最近由于RNA 干扰(RNA interference,RNA i)的发现使反义领域的研究增多。这种自然发生的现象最早是在秀丽线虫中发现的(1),是序列特异性地使转录后的基因沉默的有力机制。由于最近两年在 RNA i领域取得的进步,已经有许多这方面的综述发表(2-4)。RNA 干扰是

RNA干扰(RNA-interference,RNAi)基础知识(2)

1RNA i的发现RNA i是在研究秀丽新小杆线虫(C. elegans)反义RNA (antisenseRNA )的过程中发现的,由dsRNA 介导的同源RNA 降解过程。1995年,Guo等发现注射正义RNA (senseRNA )和反义RNA 均能有效并特异性地抑制秀丽新小杆线虫par

RNA干扰(RNA-interference,RNAi)基础知识(3)

SiRNASmall interfering RNA (siRNA):是一种小RNA分子(~21-25核苷酸),由Dicer(RNAase Ⅲ家族中对双链RNA具有特异性的酶)加工而成。SiRNA是siRISC的主要成员,激发与之互补的目标mRNA的沉默。ShRNAshRNA 短发夹RNAshRNA

The-TRC-shRNA设计方法与原则

OverviewWe design shRNA molecules with an algorithm. Our algorithm uses several criteria to rank potential 21mer targets within each human and mouse R

哺乳动物RNAi技术-Mammalian-RNA-Interference

Mammalian RNA InterferenceThomas TuschlLaboratory for RNA Molecular BiologyThe Rockefeller University, New York Excerpted from RNAi: A Guide To Gene S

RNA干扰相关知识Small-interfering-RNA(siRNA)

Small interfering RNA(siRNA):是一种小RNA分子(~21-25核苷酸),由Dicer(RNAase Ⅲ家族中对双链RNA具有特异性的酶)加工而成。SiRNA是siRISC的主要成员,激发与之互补的目标mRNA的沉默。

Small-interfering-RNA(siRNA)的概念

Small interfering RNA(siRNA):是一种小RNA分子(~21-25核苷酸),由Dicer(RNAase Ⅲ家族中对双链RNA具有特异性的酶)加工而成。SiRNA是siRISC的主要成员,激发与之互补的目标mRNA的沉默。

RNAi相关的名词解释[英文]

Argonaute - A family of proteins containing multiple domains and involved in RNA interference (RNAi). Argonatue is the main component of RNAi effector

RNAi术语表

RNAi GlossaryDicer - Dicer is a member of the RNase III family of nucleases that specifically cleave double-stranded RNAs. Dicer processes long dsRNA

siRNA用户手册

The siRNA user guide  (revised May 6, 2004) Selection of siRNA duplexes from the target mRNA sequenceUsing Drosophila melanogaster lysates (Tuschl et

SiRNA用户指南

Selection of siRNA duplexes from the target mRNA sequenceUsing Drosophila melanogaster lysates (Tuschl et al. 1999), we have systematically analyzed t

RNAi的作用机制及siRNA的合成方法(二)

2.3 倍增阶段    siRNA在RNA依赖性RNA聚合酶(RdRP)的作用下,以mRNA为模板,siRNA为引物,扩增产生足够数量的dsRNA作为底物提供给Dicer酶,产生更多的siRNA, 可再次形成RISC,并继续降解mRNA,从而产生级联放大效应。并作用于靶mRNA。如此反复

Small-interfering-RNA(siRNA)是什么意思?

Small interfering RNA(siRNA):是一种小RNA分子(~21-25核苷酸),由Dicer(RNAase Ⅲ家族中对双链RNA具有特异性的酶)加工而成。SiRNA是siRISC的主要成员,激发与之互补的目标mRNA的沉默。

关于小干扰RNA的siRNA设计介绍

  最初,siRNA序列的选择是基于实验经验而获得的(Elbashir et al. 2001,2002)。最近,生物信息学工具被用来设计siRNA(表18-1),目前多个数据库收录了经过实验确证的siRNA和shRNA。值得推荐的是,在设计新的siRNA之前可以通过搜索已有的siRNA数据库和科研

RNAi原理图解

The Mechanism of RNA Interference (RNAi)Long double-stranded RNAs (dsRNAs; typically >200 nt) can be used to silence the expression of target genes in

Differential-Interference-Contrast

Differential Interference Contrast (Nomarski, DIC, Hoffman Modulation Contrast)PrincipleDifferential interference microscopy requires several optical

siRNA数据库与设计工具

siRNA DatabaseSearchable database of Silencer ™ Validated and Pre-designed siRNAs to >34,000 human, mouse, and rat targets. All siRNAs in the database

RNAi技术专有名词(1)

1.RNAi:(RNA interference)RNA干扰 一些小的双链RNA可以高效、特异的阻断体内特定基因表达,促使mRNA降解,诱使细胞表现出特定基因缺失的表型,称为RNA干扰(RNA interference,RNAi,也译作RNA干预或者干涉)。它也是体内抵御外在感染的一种重要保护机

RNA干涉实验——采用RNA聚合酶Ⅲ启动子表达siRNA分子

实验方法原理因为哺乳动物细胞不具备低等真核生物细胞所具有的扩增 RNAi 信号的机制,因此人工合成或体外转录的 siRNA 分子在细胞内的作用是瞬时性的,不适合用于进行靶基因的表达受到抑制后细胞表型的长期变化观察,也不适于进行文库的筛选。此外,体外制备 siRNA 分子的成本比较高,而且 siRNA