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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：生物工程学院
学科：生物化工. 生物工程与技术
联系方式：zhlxiu@dlut.edu.cn
电子邮箱：zhlxiu@dlut.edu.cn
AI-2 Key Enzyme S-Ribosylhomocysteinase from Strain Klebsiella pneumoniae CICC 10011 Producing 2,3-Butanediol
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论文类型：期刊论文
发表时间：2011-03-01
发表刊物：CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
收录刊物：Scopus、SCIE、ISTIC
卷号：27
期号：2
页面范围：273-276
ISSN号：1005-9040
关键字：S-Ribosylhomocysteinase(LuxS); Kinetics; Characterization; Klebsiella pneumoniae
摘要：S-Ribosylhomocysteinase(LuxS) is the key enzyme in the synthetic pathway of a quorum sensing autoinducer AI-2. LuxS from a 2,3-butanediol produced strain Klebisella pneumoniae CICC 10011 was cloned and characterized. The luxS gene is composed of 540 bp with 172 amino acids encoded. The K(m) value for S-ribosylhomocysteine(SRH) was (27 +/- 1) mmol/L, k(cat) was (0.112 +/- 0.004) s(-1) and k(cat) /K(m) was 4.4x10(3) L(.)mol(-1.)s(-1) at 25 degrees C. LuxS was activated by divalent metal ions, the highest activity was detected with Co(2+) form, followed by Mg(2+), Ba(2+), Mn(2+), Fe(2+) and Ca(2+), and activation constant for Co(2+) is (16 +/- 2) mu mol/L.