Evidence for a common selenolate intermediate in the glutathione peroxidase-like catalysis of α-(phenylselenenyl) ketones and diphenyl diselenide
作者:Lars Engman、Claes Andersson、Ralf Morgenstern、Ian A. Cotgreave、Carl-Magnus Andersson、Anders Hallberg
DOI:10.1016/s0040-4020(01)87004-6
日期:1994.2
glutathione peroxidase-like catalysis of α-(phenylselenenyl) ketones was investigated. Degradation studies demonstrated the rapid cleavage of the aliphatic carbon-selenium bond of α-(phenylselenenyl) ketones by glutathione at pH 6.9 in a methanolic phosphate buffer under argon. On treatment with excess glutathione under aerobic conditions, α-(phenylselenenyl) ketones, S-(phenylselenenyl)glutathione and
研究了谷胱甘肽过氧化物酶样α-(苯基硒烯基)酮的催化作用。降解研究表明,在氩气下,在pH值为6.9的甲醇磷酸盐缓冲液中,谷胱甘肽可快速裂解α-(苯基硒烯基)酮的脂肪族碳-硒键。在有氧条件下用过量的谷胱甘肽处理后,α-(苯基硒烯基)谷胱甘肽和S-(苯基硒烯基)谷胱甘肽和二苯基二硒化物都显示出苯硒酸酯。发现该材料被过氧化氢的氧化比α-(苯基硒烯基)酮,S-(苯基硒烯基)谷胱甘肽或二苯基二硒化物快得多。涉及苯硒酸酯的催化机理,