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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。
    • 2. 发明授权
    • Stable analogs of bioactive peptides containing disulfide linkages
    • 含有二硫键的生物活性肽的稳定类似物
    • US06664367B1
    • 2003-12-16
    • US08278437
    • 1994-07-21
    • Raghavan RajagopalanAnanthachari SrinivasanLeon R. Lyle
    • Raghavan RajagopalanAnanthachari SrinivasanLeon R. Lyle
    • C07K1600
    • C07K14/655C07K1/006C07K7/16C07K14/52C07K14/6555C07K14/70Y10S930/28
    • Stable analogs of cyclic peptides containing disulfide linkages are disclosed. The disulfide linkage is modified by one of four methods: (a) sulfide contraction, (b) isosteric substitution, (c) thioketal expansion, or (d) alkylation expansion. In sulfide contraction the disulfide bond (—S—S—) is replaced with a monosulfide bond (—S—) in which a bifunctional effector molecule, such as a ligand or chemotoxic agent, is bound to the new peptide linkage. In isosteric substitution, one sulfur atom is replaced with a carbon atom and at least one of the carbon atoms at the modified site is a bifunctional effector molecule. In thioketal expansion, an alkylidene unit (—CR1C2—) is inserted between the two sulfur atoms. In alkylation expansion, an alkyl moiety of from C2 to C3, is inserted between the two sulfur atoms.
    • 公开了含有二硫键的环肽的稳定类似物。 二硫键通过四种方法之一进行改性:(a)硫化物收缩,(b)等排取代,(c)硫代缩酮扩展或(d)烷基化扩展。 在硫化物收缩中,二硫键(-S-S-)用单硫键(-S-)代替,其中双功能效应分子如配体或化学毒性剂与新的肽键结合。 在等排取代中,一个硫原子被碳原子取代,并且在修饰位点处的至少一个碳原子是双功能效应子分子。 在硫缩酮扩展中,在两个硫原子之间插入亚烷基单元(-CR1C2-)。 在烷基化扩展中,C2至C3的烷基部分插入在两个硫原子之间。