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    • 3. 发明申请
    • MASS DEFECT-BASED MULTIPLEX DIMETHYL PYRIMIDINYL ORNITHINE (DIPYRO) TAGS FOR HIGH-THROUGHPUT QUANTITATIVE PROTEOMICS AND PEPTIDOMICS
    • 用于高通量定量蛋白质组学和肽类物质的基于质量缺陷的多重二甲基嘧啶鸟氨酸(DIPYRO)标签
    • WO2017066650A1
    • 2017-04-20
    • PCT/US2016/057156
    • 2016-10-14
    • WISCONSIN ALUMNI RESEARCH FOUNDATION
    • LI, LingjunFROST, DustinBUCHBERGER, Amanda
    • C07D239/08C07D239/14G01N27/62G01N33/50G01N33/68
    • G01N33/6848C07D239/42G01N2458/15
    • The use of mass defect signatures to impart milliDalton mass differences between isotopically labeled peptides at the MS 1 -level allows multiplex quantification without the increased mass spectral complexity that occurs with mass difference approaches. Provided herein is a mass defect-based chemical tag, dimethyl pyrimidinyl ornithine (DiPyrO), that is compact and easy to synthesize at high purity in few steps using commercially available starting materials. The multiplex DiPyrO tags are amine-reactive and can impart a mass difference onto labeled peptides and through calculated substitution of heavy isotopes. DiPyrO offers up to 10-plex quantification on current Orbitrap or FT-ICR platforms without increasing mass spectral complexity. The synthesis of the DiPyrO tag is provided along with viability of the DiPyrO tag for labeling complex proteomics samples using yeast extract digests and its effect on labeled peptides during LC-MS 2 analysis. Labeling and quantification of glycans and metabolites using the DiPyrO tag is also demonstrated.
    • 使用质量缺陷特征来使MS1 / - 水平上的同位素标记的肽之间的毫当量质量差异允许进行多重定量而不增加质量差异所发生的质谱复杂度 方法。 本文提供的是基于质量缺陷的化学标签二甲基嘧啶鸟氨酸(DiPyrO),其紧凑且易于使用市售起始材料在几个步骤中以高纯度合成。 多元化的DiPyrO标签是胺反应性的,并且可以在标记的肽上产生质量差异,并且通过计算重质同位素的替换。 DiPyrO在当前的Orbitrap或FT-ICR平台上提供高达10倍的量化,而不会增加质谱的复杂性。 DiPyrO标签的合成与DiPyrO标签的生存能力一起提供,用于使用酵母提取物消化物标记复杂的蛋白质组学样品及其在LC-MS 2/2分析期间对标记肽的影响。 还证明了使用DiPyrO标签标记和定量聚糖和代谢物。