Small RNA修饰芯片

  • 简介
  • 芯片与测序平台
  • 挑战及解决方案
  • 数据库
  • 结果展示
  • Arraystar small RNA修饰芯片服务在单张芯片可定量miRNA,pre-miRNA,tRNA和tRNA衍生的small RNA(tsRNA,包括tRF&tiRNA)的8-氧代鸟嘌呤(o8G),7-甲基鸟苷(m7G),N6-甲基腺苷(m6A),1-甲基腺嘌呤(m1A),假尿苷(Ψ)或5-甲基胞苷(m5C)修饰。


    技术优势

    • 能够检测及定量多种small RNA上修饰,分别包括o8G,m7G,m6A,Ψ,m1A或m5C

    • 能够检测多种small RNA,包括miRNA,pre-miRNA,tRNA和tRF&tiRNA

    • 金标准准确定量small RNA的修饰:直接RNA末端标记可确保定量的高保真性;不会产生逆转录或PCR扩增造成的数据偏倚

    • 高灵敏度检测低水平small RNA的修饰:克服small RNA-seq方法局限性,对低表达或低修饰水平的small RNA分析具有出色的分析灵敏度。

    • 所需的样品量低,总RNA量低至2 µg。


    服务名称 修饰 描述 规格 价格
    Human/Mouse/Rat Small RNA 修饰芯片 O8G 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的O8G修饰 8 x 15K 请询价
    Human/Mouse/Rat Small RNA 修饰芯片 m7G 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的m7G修饰 8 x 15K 请询价
    Human/Mouse/Rat Small RNA 修饰芯片 m6A 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的m6A修饰 8 x 15K 请询价
    Human/Mouse/Rat Small RNA 修饰芯片 m1A 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的m1A修饰 8 x 15K 请询价
    Human/Mouse/Rat Small RNA 修饰芯片 Ψ 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的Ψ修饰 8 x 15K 请询价
    Human/Mouse/Rat Small RNA 修饰芯片 m5C 定量检测miRNA,pre-miRNA,tRNA和tRF&tiRNA的m5C修饰 8 x 15K 请询价


  • 针对tRNA修饰检测,我们同时提供tRNA修饰测序- m1A/m3C/m1G/m2,2Gsmall RNA修饰芯片服务。下图是两个平台的比较,可以帮助您更好的选择合适您研究目的的平台。


    tRNA 修饰测序 -m1A/m3C/m1G/m2,2G Small RNA 修饰芯片
    只适用于tRNA 可检测多种小RNA分子类型,包括miRNAs、pre-miRNAs、tRNAs和tRFs & tiRNAs
    单碱基分辨率定位修饰位点,对tRNA反密码子区及主体区域特定碱基位点的修饰进行精准解析,是研究tRNA修饰功能的关键依据 可实现修饰水平定量检测,但无法定位到单碱基位点
    一次性检测m1A、m3C、m1G、m2,2G四种甲基化修饰 每次项目只能检测一种修饰类型
  • Small RNA修饰高通量筛选面临的挑战

    尽管测序已用于small RNA高通量筛选,但RNA修饰对测序定量的影响仍被严重忽视。RNA上多种修饰(m1A,m3C和m1G等)会干扰测序建库过程中的逆转录,因此small RNA-seq对small RNA修饰的定量是不准确的,特别是对small RNA上的修饰。 例如,Small RNA-seq大多偏向检测18nt的3’tsRNA,而Northern blot主要检测到的是22nt的同工型3’tsRNA。这是由于TUC存在m1A,会抑制逆转录酶进行逆转录。大多数small RNA测序数据是从上述文库构建方法中获得的,因此,对于有修饰的small RNA,这些数据可能产生误导。

     同样,small RNA-seq需要多个PCR扩增步骤,这会导致明显的定量偏差及不准确,因此需要使用独立正交方法。 

     事实上,研究修饰的测序方法需要大量的样本(总RNA> 100 ug),这样对样本量有限的研究会产生极大的限制。 

     此外,small RNA测序通常使用Reads Per Million(RPM)进行标准化,来表示样品中RNA的相对丰度。 然而,RPM取决于样品中small RNA的组成。 一个small RNA的RPM的变化将影响所有其它small RNA的值,即使它们的绝对表达水平没有改变。

     为了以高灵敏度和准确的化学计量来鉴定和定量small RNA的修饰谱,需要克服基于测序的方法的局限,开发非测序技术。


    定量small RNA转录后修饰的技术

    Arraystar small RNA修饰筛选方法(图1)将small RNA芯片与RNA免疫沉淀(RIP)进行整合,可在一张芯片上同时检测修饰及未修饰small RNA水平,为修饰对small RNA(包括miRNA,pre-miRNA,tRNA和tRF&tiRNA)的调控提供重要信息,

    图1. Arraystar small RNA修饰筛选技术,分别鉴定和定量small RNA转录后修饰,分别为o8G,m7G,m6A,m1A,Ψ和m5C。使用特异性抗体通过免疫沉淀富集修饰的small RNA后,使用Arraystar small RNA修饰芯片进行鉴定和定量。


  • 人类small RNA 修饰芯片 V2.0

    探针总数 14,706
    探针设计策略 整个探针由5’cap区, small RNA特异性区和3’linker区组成.
    探针结合位点 5-p-miRNA 和 5'tsRNA: small RNA的3’区域
    3-p-miRNA 和 3'tsRNA: small RNA的5’区域
    tRNA:成熟 tRNA 的反密码子环序列
    Pre-miRNA: pre-miRNA的颈环区域设计
    探针特异性 small RNA特异性
    miRNA数目 2,627 (1,318个5-p-miRNAs, 1,309个3-p-miRNAs )
    pre-miRNAs数目 1,745
    成熟tRNAs数目 346
    tRFs&tiRNAs数目 4254
    Small RNA来源数据库 miRNA: miRBase (v22)
    pre-miRNA: miRBase (v22)
    tRNA: GtRNADb(Updated to 18.1 2019.08), ENSEMBL(v99)
    tRF&tiRNA: tRFdb, GtRNADb (更新至18.1 2019.08)
    文献: 公开发表的文献至 2019 [1-40]
    芯片规格 8 x 15K


    小鼠 small RNA 修饰芯片 V2.0

    探针总数 14,895
    探针设计策略 整个探针由5’cap区, small RNA特异性区和3’linker区组成.
    探针结合位点 5-p-miRNA和 5'tsRNA: small RNA的3’区域
    3-p-miRNA 和 3'tsRNA: small RNA的5’区域
    tRNA:成熟 tRNA 的反密码子环序列
    Pre-miRNA: pre-miRNA的颈环区域设计
    探针特异性 small RNA特异性
    miRNA数目 1949 (966个 5-p-miRNAs and 983个 3-p-miRNAs )
    pre-miRNAs数目 1,122
    成熟tRNAs数目 270
    tRFs&tiRNAs数目 1767
    Small RNA来源数据库 miRNA: miRBase (v22)
    pre-miRNA: miRBase (v22)
    tRNA: GtRNADb(Updated to 18.1 2019.08), ENSEMBL(v99)
    tsRNA: tRFdb, GtRNADb (更新至18.1 2019.08)
    文献: 公开发表的文献至 2019 [1-40]
    芯片规格 8 x 15K


    大鼠 small RNA 修饰芯片 V2.0

    探针总数 14,895
    探针设计策略 整个探针由5’cap区, small RNA特异性区和3’linker区组成.
    探针结合位点 5-p-miRNA和 5'tsRNA: small RNA的3’区域
    3-p-miRNA 和 3'tsRNA: small RNA的5’区域
    tRNA:成熟 tRNA 的反密码子环序列
    Pre-miRNA: pre-miRNA的颈环区域设计
    探针特异性 small RNA特异性
    miRNA数目 749(355个 5-p-miRNAs and394个 3-p-miRNAs )
    pre-miRNAs数目 448
    成熟tRNAs数目 197
    tRFs&tiRNAs数目 1135
    Small RNA来源数据库 miRNA: miRBase (v22)
    pre-miRNA: miRBase (v22)
    tRNA: GtRNADb(Updated to 18.1 2019.08), ENSEMBL(v99)
    tsRNA: tRFdb, GtRNADb (更新至18.1 2019.08)
    芯片规格 8 x 15K


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  • 数据分析包括直接使用的关键数据,有用的注释信息和出版级别的图形。

    差异修饰small RNA列表,包括miRNApre-miRNAtRNAtRF&tiRNA



     MatureID: 成熟miRNA在miRBase 的ID

     Group m7G miRNA level (normalized, log2): 基于Cy5标记的m7G-IP RNA的初始信号值得到的log2转换的标准化后的组平均值。

     Treated, Control: 实验组和对照组

     FC: 两组比较的差异倍数

     P: t test检验分析的统计学差异的p值

     Regulation: 两组比较的上调或者下调

     Group m7G %modified miRNA: m7G修饰的miRNA组平均百分比

     miRNA_family: 具有相同的种子序列的miRNA家族

     m7G_motif: “RAm7GGT” m7G 的motif基序, R 代表G或A.


    差异修饰的miRNA,pre-miRNA,tRNA和tRF&tiRNA的分层聚类热图



    图2.差异修饰small RNA的分层聚类热图。 修饰的RNA水平由左上方小图中红蓝色色标表示。顶部树状图显示了样品之间修饰图谱相对接近度。组别由热图上方的色条表示。