Glutathione Conjugation of Methazolamide and Subsequent Reactions in the Ciliary Body In Vitro
作者:Kenichi Kishida、Yasushi Akaki、Tetsuo Sasabe、Chizuko Yamamoto、Reizo Manabe
DOI:10.1002/jps.2600790720
日期:1990.7
Conjugation reaction of methazolamide with glutathione and its subsequent reactions were studied in vitro. Glutathione, cysteinylglycine, and cysteine conjugates of methazolamide were chemically synthesized. All of the three compounds showed absorbance below 330 nm, with maximal absorbance at approximately 300 nm. At the wavelengths below 220 nm, absorbance was proportional to the number of the amino
体外研究了甲唑酰胺与谷胱甘肽的偶联反应及其后续反应。化学合成了谷胱甘肽,半胱氨酰甘氨酸和甲唑酰胺的半胱氨酸结合物。三种化合物的所有吸光度均低于330 nm,最大吸光度约为300 nm。在低于220 nm的波长下,吸光度与每种化合物具有的氨基酸数量成正比。谷胱甘肽结合物的氨基酸分析表明,结合反应涉及谷胱甘肽的半胱氨酸残基。为了鉴定反应产物的化学结构,对半胱氨酸缀合物进行了红外,质子核磁共振和质谱分析。这些研究表明半胱氨酸缀合物是S-(5-乙酰亚氨基-4-甲基-δ2-1,3,4-噻二唑啉基)半胱氨酸。与谷胱甘肽的反应不是由谷胱甘肽S-转移酶催化的,而是在不存在该酶的情况下进行的。谷胱甘肽结合物被牛睫状体匀浆降解为半胱氨酰甘氨酸结合物,然后半胱氨酸结合物。