高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (4): 586.

• 论文 • 上一篇    下一篇

微量热法研究黄嘌呤氧化酶反应

梁毅1, 汪存信1, 邹国林2, 屈松生1, 吴元欣3, 李定或3   

  1. 1. 武汉大学化学系, 武汉, 430072;
    2. 武汉大学化学系生命科学院, 武汉, 430072;
    3. 武汉化工学院化工系, 武汉, 430074
  • 收稿日期:1996-03-14 出版日期:1997-05-24 发布日期:1997-05-24
  • 通讯作者: 梁毅, 男, 31岁, 博士研究生, 副教授.
  • 作者简介:梁毅, 男, 31岁, 博士研究生, 副教授.
  • 基金资助:

    国家自然科学基金

Studies of Xanthine Oxidation by Xanthine Oxidase Using Microcalorimetry

LIANG Yi1, WANG Cun-Xin1, ZOU Guo-Lin2, QU Song-Sheng1, WU Yuan-Xin3, LI Ding-Huo3   

  1. 1. Department of Chemistry, College of Life Science, Wuhan University, Wuhan, 430072;
    2. College of Life Science, Wuhan University, Wuhan, 430072;
    3. Department of Chemical Engineering, Wuhan Institute of Chemical Technology, Wuhan, 430074
  • Received:1996-03-14 Online:1997-05-24 Published:1997-05-24

摘要: 在热导式热量计双参数理论模型的基础上,建立了较快酶促反应研究的双参数初始速率法的热动力学模型.用微量热法研究了黄嘌呤氧化酶催化氧化黄嘌呤的热动力学.该较快酶促反应遵循Michaelis-Menten动力学,在298.15K和pH=7.5时,其米氏常数(Km)为1.04×10-3mol·L-1,与文献结果相符.

关键词: 微量热法, 黄嘌呤氧化酶, 较快酶促反应, 双参数初始速率法, 热动力学

Abstract: Thermokinetic model of two-parameter initial rate method for faster enzyme-cat-alyzed reactions has been suggested based on the two-parameter theoretical model of conduc-tion calorimeter.Thermokinetics of xanthine oxidation catalyzed by xanthine oxidase wasstudied using microcalorimetry.This faster enzyme-catalyzed reaction obeyed the Michaelis-Menten kinetics, and at 298.15 Kand pH 7.5, the Michaelis constant(Km) for xanthine was1.04×10-3 mol·L-1, which is in agreement with that given in the literature.

Key words: Microcalorimetry, Xanthine oxidase, Faster enzyme-catalyzed reaction, Two-parameter initial rate method, Thermokinetics

TrendMD: