申请人:Biomeasure Inc., Massachusetts corporation
公开号:US20030050436A1
公开(公告)日:2003-03-13
A linear (i.e., non-cyclic) analog of biologically active amphibian bombesin, mammalian gastrin-releasing peptide (GRP), or mammalian growth hormone releasing factor (GRF), having an active site and a binding site responsible for the binding of the peptide to a receptor on a target cell. Cleavage of a peptide bond in the active site of naturally occurring bombesin, GRP, or GRF is unnecessary for in vivo biological activity. The analog has one of the following modifications: (a) a deletion of an amino acid residue within the active site and a modification of an amino acid residue outside of the active site, (b) a replacement of two amino acid residues within the active site with a synthetic amino acid, a &bgr;-amino acid, or a &ggr;-amino acid residue, or (c) a non-peptide bond instead of a peptide bond between an amino acid residue of the active site and an adjacent amino acid residue.
一种具有生物活性的两栖动物蚕豆素、哺乳动物胃泌素释放肽(GRP)或哺乳动物生长激素释放因子(GRF)的线性(即非环状)类似物,具有一个活性位点和一个结合位点,负责将肽与靶细胞上的受体结合。对于体内生物活性而言,天然蚕豆蛋白、生长激素释放因子或生长激素释放因子活性位点上的肽键无需裂解。类似物具有下列修饰之一:(a) 活性位点内一个氨基酸残基的缺失和活性位点外一个氨基酸残基的修饰,(b) 用合成氨基酸、&bgr;-氨基酸或&ggr;-氨基酸残基取代活性位点内的两个氨基酸残基,或(c) 活性位点的一个氨基酸残基与相邻氨基酸残基之间用非肽键代替肽键。