Hydrolytic Cleavage of Pyroglutamyl-Peptide Bond. III. A Highly Selective Cleavage in 70% Methanesulfonic Acid.
作者:Tadashi HASHIMOTO、Kazuhiro OHKI、Naoki SAKURA
DOI:10.1248/cpb.44.2033
日期:——
A method for highly selective cleavage of pGlu-peptide linkages in 70% methanesulfonic acid (MSA) is described. When pGlu-Ala-Phe-OH, pGlu-His-Pro-Oh and dog neuromedin U-8 (d-NMU-8) (1--7)-OH (pGlu-Phe-Leu-Phe-Arg-OH) were hydrolyzed in 70% MSA at 60 degrees C for 3 h or at 25 degrees C for 3 d, the pGlu-peptide linkage was predominantly cleaved to give H-Ala-OH, H-His-Pro-OH and H-Phe-Leu-Phe-Arg-Pro-Arg-OH
描述了一种在70%甲磺酸(MSA)中高选择性裂解pGlu-肽键的方法。当pGlu-Ala-Phe-OH,pGlu-His-Pro-Oh和狗神经调节素U-8(d-NMU-8)(1--7)-OH(pGlu-Phe-Leu-Phe-Arg-OH)将其在70%MSA中于60°C水解3h或在25°C水解3d,主要裂解pGlu-肽键,得到H-Ala-OH,H-His-Pro-OH和H-Phe- Leu-Phe-Arg-Pro-Arg-OH,高产。结果表明,pGlu-肽键对70%MSA高度敏感,而pGlu残基的吡咯烷酮部分的酰胺键和其他内部肽键则具有极高的抵抗力。