Labeled peptides, proteins and antibodies and processes and intermediates useful for their preparation
申请人:——
公开号:US20020055133A1
公开(公告)日:2002-05-09
The invention provides peptide synthons having protected functional groups for attachment of desired moieties (e.g. functional molecules or probes). Also provided are peptide conjugates prepared from such synthons, and synthon and conjugate preparation methods including procedures for identifying the optimum probe attachment site. Biosensors are provided having environmentally sensitive dyes that can locate specific biomolecules within living cells and detect chemical and physiological changes in those biomolecules as the living cell is moving, metabolizing and reacting to its environment. Methods are included for detecting GTP activation of a Rho GTPase protein using polypeptide biosensors. When the biosensor binds GTP-activated Rho GTPase protein, the environmentally sensitive dye emits a signal of a different lifetime, intensity or wavelength than when not bound. New fluorophores whose fluorescence responds to environmental changes are also provided that have improved detection and attachment properties, and that can be used in living cells, or in vitro.
该发明提供了具有保护功能基团的肽合成物,用于连接所需的基团(例如功能分子或探针)。还提供了从这些合成物制备的肽共轭物,并提供了用于鉴定最佳探针连接位点的合成物和共轭物制备方法。提供了生物传感器,其中包含可以定位活细胞内特定生物分子并检测这些生物分子在细胞移动、代谢和对其环境反应时的化学和生理变化的环境敏感染料。还包括用于使用多肽生物传感器检测Rho GTPase蛋白的GTP激活的方法。当生物传感器结合GTP激活的Rho GTPase蛋白时,环境敏感染料发出与未结合时不同寿命、强度或波长的信号。还提供了对环境变化响应的新荧光分子,具有改进的检测和连接特性,并可用于活细胞或体外。