(Tyr-Pro-Trp-Phe-NH2, EM-1), an effective analgesic, was efficiently synthesized by a combination of enzymatic and chemical methods. Peptide Boc-Trp-Phe-NH2 was synthesized with a high yield of 97.1% by the solvent-stable protease WQ9-2 in a 20% methanol medium. The maximum concentration (141 g L−1) of Boc-Trp-Phe-NH2 was obtained with an economical molar ratio of the substrate of 1:1. The products crystallized
内啡肽1(Tyr-Pro-Trp-Phe-NH 2,EM-1),有效 止痛药通过酶促方法和化学方法的有效合成。 肽类Boc-Trp-Phe-NH 2的合成产率高达97.1%。溶剂在20%甲醇培养基中的稳定蛋白酶WQ9-2。在经济的底物摩尔比为1 :1的情况下,获得Boc-Trp-Phe-NH 2的最大浓度(141 g L -1)。纯化,然后通过以下方式删除Boc小组: 三氟乙酸 产生 色氨酸-苯丙氨酸-NH 2。使用高效混合碳酸酐 方法, Boc-Tyr-Pro-OH是化学合成的。通过另一种有机化合物合成了四肽Boc-Tyr-Pro-Trp-Phe-NH 2,收率为84.5%。溶剂耐蛋白酶,PT121,来自 Boc-Tyr-Pro-OH和Trp-Phe-NH 2在有机-水双相系统中,并用乙酸乙酯,移动合成的平衡。EM-1是通过从Boc-Tyr-Pro-Trp-Phe-NH 2中除去Boc基
Polypeptides. Part VIII. Variations of the aspartyl position in the C-terminal tetrapeptide amide sequence of the gastrins
作者:H. Gregory、J. S. Morley、J. M. Smith、M. J. Smithers
DOI:10.1039/j39680000715
日期:——
The synthesis is described of analogues of L-tryptophyl-L-methionyl-L-aspartyl-L-phenylalanine amide (the C-terminalsequence of the gastrins), and its N-benzyloxycarbonyl or N-t-butoxycarbonyl derivatives, wherein the aspartyl residue has undergone replacement by alanyl, β-aspartyl, asparaginyl, cysteinyl, glutamyl, glycyl, lysyl, norvalyl, ornithyl, seryl, threonyl, and other amino-acyl residues