Two enkephalin-containing peptides, peptide E and dynorphin (1-24), were synthesized by conventional solution methods employing a new Trp derivative, Nin-(2, 4, 6-triisopropylphenylsulfonyl)tryptophan [Trp(Tps)]. All protecting groups employed including the Tps group were removed by treatment with 1 M trifluoromethanesulfonic acid (TFMSA)-thioanisole in trifluoroacetic acid (TFA) at the final steps of these syntheses. Subsequent purifications by Sephadex G-25 chromatography, CM-Biogel A ion exchange chromatography, and reversed-phase high-performance liquid chromatography afforded highly purified samples. Both synthetic peptide E and dynorphin (1-24) exhibited high in vitro opioid activity. The usefulness of this new tryptophan derivative for practical peptide synthesis was established through these syntheses of complex Trp-containing peptides.
我们采用一种新的 Trp 衍
生物 Nin-(2,4,6-
三异丙基苯磺酰基)色
氨酸[Trp(Tps)],通过传统的溶液方法合成了两种含
脑啡肽的肽类--肽 E 和达因
吗啡肽 (1-24)。在这些合成的最后步骤中,通过在
三氟乙酸(TFA)中使用 1 M
三氟甲磺酸(T
FMSA)-
硫代
苯甲醚处理,除去了包括 Tps 基团在内的所有保护基团。随后通过 Sephadex G-25 色谱、CM-Biogel A 离子交换色谱和反相高效
液相色谱进行纯化,得到了高度纯化的样品。合成肽 E 和达因
吗啡肽 (1-24) 在体外均表现出很高的阿片活性。通过这些含 Trp 的复杂
多肽的合成,我们确定了这种新型色
氨酸衍
生物在实际
多肽合成中的用途。