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    • 8. 发明申请
    • Detection and quantification of modified proteins
    • 修饰蛋白的检测和定量
    • US20120149883A1
    • 2012-06-14
    • US13284255
    • 2011-10-28
    • Steven P. GygiJunmin Peng
    • Steven P. GygiJunmin Peng
    • C07K17/00C07K16/00
    • G01N33/6848C07K1/22C07K7/08C12Q1/37G01N33/6803G01N33/6842G01N33/6896G01N2440/36G01N2560/00Y10T436/24
    • The invention provides a method detecting and quantifying proteins by mass spectrophotometric analysis using peptide internal standards and provides a highly sensitive way of detecting protein modifications. In one aspect, the invention provides a method for determining a site of ubiquitination in a polypeptide and for evaluating ubiquitination targets in a population of polypeptides. In this way, a proteome ubiquitination map can be obtained which comprises information relating to the ubiquitination states of a plurality of cellular polypeptides. Maps can be obtained for a variety of different types of cells and cell states. For example, ubiquitination targets in normal and diseased cells can be evaluated. Preferably, the map is stored as data files in a database. Individual ubiquitinated polypeptides identified can be used to generate molecular probes diagnostic of a cell state and/or can serve as targets for agents that modulate one or more cellular processes.
    • 本发明提供了通过使用肽内标的质谱分析法检测和定量蛋白质的方法,并提供了检测蛋白质修饰的高度灵敏的方法。 一方面,本发明提供了一种确定多肽泛素化位点的方法,并用于评价多肽群体中的泛素化靶标。 以这种方式,可以获得包含与多个细胞多肽的泛素化状态有关的信息的蛋白质组泛素化图。 可以获得各种不同类型的细胞和细胞状态的图。 例如,可以评估正常和患病细胞中的泛素化靶标。 优选地,地图作为数据文件存储在数据库中。 鉴定的单个泛素化多肽可用于产生诊断细胞状态的分子探针和/或可用作调节一种或多种细胞过程的试剂的靶标。