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    • 6. 发明授权
    • Agonist peptide dimers
    • 激动肽二聚体
    • US5767078A
    • 1998-06-16
    • US484135
    • 1995-06-07
    • Dana L. JohnsonRobert A. Zivin
    • Dana L. JohnsonRobert A. Zivin
    • A61K38/00A61K38/22A61K38/28C07K1/107C07K14/505C07K2/00C07K5/00C07K7/00
    • C07K14/505C07K1/1072A61K38/00
    • The present invention is directed to the dimerization of agonists and antagonists of cell surface receptors and particularly to peptide dimers which behave as cell surface receptor agonists in their dimeric form. Such receptors belong to the dimerization-mediated activation class often observed among receptors for growth and differentiation factors. The agonists of this class of receptors is understood to effect dimerization of the receptor and thus signal initiation. The present invention exemplifies dimers of erythropoietin (EPO) agonists and antagonists comprising a core amino acid sequence of X.sub.3 X.sub.4 X.sub.5 GPX.sub.6 TWX.sub.7 X.sub.8 (SEQ ID NO: 1) wherein each amino acid is indicated by standard one letter abbreviation; X.sub.3 can be C, A, .alpha.-amino-.gamma.-bromobutyric acid or Hoc; X.sub.4 can be R, H, L or W; X.sub.5 can be M, F, or I; X.sub.6 is independently selected from any one of the 20 genetically coded L-amino acids or the stereoisomeric D-amino acids; X.sub.7 can be D, E, I, L or V; and X.sub.8 can be C, A, .alpha.-amino-.gamma.-bromobutyric acid or Hoc, provided that either X.sub.3 or X.sub.8 is C or Hoc.
    • 本发明涉及细胞表面受体的激动剂和拮抗剂的二聚,特别涉及作为其二聚体形式的细胞表面受体激动剂的肽二聚体。 这种受体属于通常在生长和分化因子的受体中观察到的二聚化介导的活化类别。 这类受体的激动剂被理解为影响受体的二聚化,从而使信号起始。 本发明例示了包含X3X4X5GPX6TWX7X8(SEQ ID NO:1)的核心氨基酸序列的促红细胞生成素(EPO)激动剂和拮抗剂的二聚体,其中每个氨基酸由标准的一个字母的缩写表示; X3可以是C,A,α-氨基-γ-溴丁酸或Hoc; X4可以是R,H,L或W; X5可以是M,F或I; X6独立地选自20个遗传编码的L-氨基酸或立体异构体D-氨基酸中的任一个; X7可以是D,E,I,L或V; X 8可以是C,A,α-氨基-γ-溴丁酸或Hoc,条件是X3或X8为C或Hoc。