The 600 MHz 1H-nuclear magnetic resonance spectra of a mixed aqueous solution of typsin and a synthesized trypsin inhibitor, 4-[4-(N, N-dimethylcarbamoylmethoxycarbonylmethyl)phenoxycarbonylphenyl]-guanidinium methanesulfonate(FOY-305) were measured. Signals assigned to the inhibitor protons indicated that the hydrated fragment of the inhibitor formed a complex with trypsin. The signal change during 4 h of incubation at 37°C was interpreted as reflecting a successive process of the partial release of the fragment and its weak recombination with the enzyme around the active site. The result is consistent with the disorder of the fragment in the crystal structure of the inhibitor : trypsin complex.
测量了
酪蛋白和合成的胰蛋白酶抑制剂 4-[4-(N, N-二甲基
氨基甲酰甲氧羰基甲基)苯氧羰基苯基]-
甲磺酸胍(FOY-305)的混合
水溶液的 600
MHz 1H 核磁共振谱。分配给
抑制剂质子的信号表明,
抑制剂的
水合片段与胰
蛋白酶形成了复合物。在 37°C 孵育 4 小时期间的信号变化被解释为反映了片段的部分释放及其与酶在活性位点周围的微弱
重组的连续过程。这一结果与
抑制剂:胰
蛋白酶复合物晶体结构中片段的无序性一致。