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    • 3. 发明授权
    • Absolute quantitation of protein contents based on exponentially modified protein abundance index by mass spectrometry
    • 基于指数变化的蛋白质丰度指数通过质谱法对蛋白质含量进行绝对定量
    • US07910372B2
    • 2011-03-22
    • US11658592
    • 2005-07-04
    • Yasushi Ishihama
    • Yasushi Ishihama
    • G01N33/00G01N33/48
    • G01N33/6803G01N33/6848
    • The present inventor has established protein abundance index (PAI, π) to determine the protein contents in a protein mixture solution using nanoLC-MSMS data. Digested peptides were analyzed by nanoLC-MS/MS and the obtained results were applied to a Mascot protein identification algorism based on tandem mass spectra. For absolute quantitation, PAI was converted to exponentially modified PAI (EMPAI, m π), which is proportional to protein contents in the protein mixture. EMPAI was successfully applied to comprehensive protein expression analysis and performed a comparison study between gene and protein expression in an HCT116 human cancer cells. Accordingly, the present invention provides a method and a computer program for quantifying the protein contents based on the protein abundance index.
    • 本发明人利用nanoLC-MSMS数据建立了蛋白质丰度指数(PAI,pgr),以确定蛋白质混合溶液中的蛋白质含量。 通过纳米LC-MS / MS分析消化肽,将得到的结果应用于基于串联质谱的吉祥物蛋白鉴定算法。 为了绝对定量,PAI被转化为指数变化的PAI(EMPAI,m&pgr),其与蛋白质混合物中的蛋白质含量成比例。 EMPAI成功应用于综合蛋白表达分析,并在HCT116人类癌细胞中进行基因与蛋白质表达的比较研究。 因此,本发明提供了一种用于基于蛋白质丰度指数量化蛋白质含量的方法和计算机程序。