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    • 1. 发明授权
    • Metal chelates as spacer compounds in biologically active peptides
    • 金属螯合物作为生物活性肽中的间隔物化合物
    • US5464934A
    • 1995-11-07
    • US63172
    • 1993-05-14
    • T. Jeffrey DunnAnanthachari SrinivasanLeon R. LyleRaghavan Rajagopalan
    • T. Jeffrey DunnAnanthachari SrinivasanLeon R. LyleRaghavan Rajagopalan
    • A61K51/00A61K49/04A61K49/14A61K51/08C07K1/04C07K5/10C07K7/04C07K14/815C07K5/00A61K49/00C07K7/00C07K17/00
    • A61K49/14C07K1/04C07K14/815
    • Ligands that are capable of forming metal complexes are incorporated directly into peptides at nonbiologically active locations. The metal complex serves as a bifunctional agent and as a spacer molecule. In one aspect of the invention, the ligands are prepared by replacing a nonbiologically active peptide spacer sequence with either Cys-Gly-Gly-Glu(.gamma.-)CO- (SEQ ID NO:1) or Cys-Gly-Gly-Lys(.epsilon.-)NH-CO(CH.sub.2).sub.2 -CO- (SEQ ID NO:2). In these examples, unnatural peptide bonds are used to attach the ligand to the terminal end of the peptide. Peptides incorporating such ligands are also disclosed.Other spacer ligands which may be incorporated into peptides include the following natural peptide sequences: -Cys-Gly-His-, -Asp-Gly-Cys-, -Glu-Gly-Cys-, -Gly-Asp-Cys-, and -Gly-Glu-Cys-. Unnatural tripeptides which function as spacer ligands include: -Cys-Gly-(imidazolyl glycyl)-, -isoCys-Gly-(imidazolyl glycyl)-, and -isoCys-Gly-His-. When the above peptide sequences are present in a nonbiologically active peptide spacer, they are able to form metal complexes with desired metal ions, and the resulting complexes serve as bifunctional agents and as spacer molecules in the peptide.
    • 能够形成金属络合物的配体在非生物活性位置直接并入肽中。 金属络合物用作双官能剂和间隔分子。 在本发明的一个方面,通过用Cys-Gly-Gly-Glu(γ - )CO-(SEQ ID NO:1)或Cys-Gly-Gly-Lys(SEQ ID NO:1)替代非生物活性肽间隔序列 ε-)NH-CO(CH 2)2 -CO-(SEQ ID NO:2)。 在这些实施例中,使用非天然肽键将配体连接到肽的末端。 还公开了掺入这种配体的肽。 可以并入肽中的其它间隔配体包括以下天然肽序列:-Cys-Gly-His-,-Asp-Gly-Cys-,-Glu-Gly-Cys-,-Gly-Asp-Cys-和 - Gly-Glu-Cys-。 用作间隔基配体的非天然三肽包括:-Cys-Gly-(咪唑基甘氨酰基) - , - iSysys-Gly-(咪唑基甘氨酰基) - 和-i-Syysys-Gly-His-。 当上述肽序列存在于非生物活性肽间隔物中时,它们能够与期望的金属离子形成金属络合物,并且所得复合物用作双功能试剂和肽中的间隔分子。