...
【24h】

Hydrogenases

机译:氢化酶

获取原文
           

摘要

Hydrogenases are a diverse group of metalloenzymes~(1-4) that catalyze one of the simplest molecular reactions, the conversion of dihydrogen into protons and electrons and the reverse reaction, the generation of dihydrogen: H_2(?H~++H~-)?2H~++2e~- (1) The reaction takes place at a specialized metal center that dramatically increases the acidity of H_2 and leads to a heterolytic splitting of the molecule which is strongly accelerated by the presence of a nearby base. The reverse reaction, the heterogenesis of H_2, involves the respective coupling of H~+ and H~-. The heterolytic mechanism has been proven by H/D isotope exchange experiments H_2 + D_2 ? OHD + HDO.~5 The enzyme also catalyzes the conversion of para- to orthodihydrogen.~(6,7)
机译:氢酶是多种多样的金属酶〜(1-4),它们催化最简单的分子反应之一,即将二氢转化为质子和电子,以及进行逆反应,生成二氢:H_2(?H〜++ H〜- )2 H 2 +++ 2e 2-(1)该反应在一个专门的金属中心发生,该中心显着增加了H_2的酸度,并导致分子的杂化分裂,该分裂由于附近碱基的存在而大大加速。逆反应,即H_2的异质反应,涉及H〜+和H〜-各自的偶联。通过H / D同位素交换实验H_2 + D_2?证明了杂化机理。 OHD + HDO。〜5该酶还催化对位氢转化为邻二氢。〜(6,7)

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号