The heptatriacontapeptide amide corresponding to the entire amino acid sequence of human calcitonin gene-related peptide (hCGRP) was synthesized by assembling seven peptide fragments in solution, followed by deprotection with 1 M trifluoromethanesulfonic acid-thioanisole in trifluoroacetic acid and subsequent air-oxidation to establish the disulfide bridge. The S-1-adamantyl group of the Cys residue was removed in two ways; one was by treatment with the above acid, together with the other protecting groups employed, and the other was selectively by treatment with(CF3COO)3Tl. The synthetic peptide produced a significant increase of cyclic adenosine monophosphate in calvaria and brain of a newborn rat, but suppressed 45Ca-release from mouse calvaria stimulated by parathyroid hormone.
通过在溶液中组装七个肽片段,然后在
三氟乙酸中用1 M
三氟甲磺酸-
硫代
苯甲醚进行脱保护,并随后进行空气氧化以建立二
硫键,从而合成了与人类
降钙素基因相关肽(hCGRP)的整个
氨基酸序列相对应的七十三肽酰胺。通过两种方法去除Cys残基的S-1-
金刚烷基:一种是用上述酸与所使用的其他保护基一起处理,另一种是有选择地用(CF3COO)3Tl处理。合成肽使新生大鼠颅骨和大脑中的环
磷酸腺苷显著增加,但抑制了由
甲状旁腺激素刺激的小鼠颅骨中的45Ca释放。