文章基本信息

标题：An Escherichia coli mutant deficient in pyruvate oxidase activity due to altered phospholipid activation of the enzyme
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作者：Ying-Ying Chang ; John E. Cronan
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1984
卷号：81
期号：14
页码：4348-4352
DOI：10.1073/pnas.81.14.4348
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The pyruvate oxidase (pyruvate:ferricytochrome b1 oxidoreductase, EC 1.2.2.2 ) of Escherichia coli is markedly activated by phospholipids in vitro. To test the physiological relevance of this activation, we isolated an E. coli mutant producing an oxidase that is deficient in activation by (and binding to) phospholipids. The mutant oxidase could be fully activated by a specific proteolytic cleavage, indicating that the catalytic site is normal. The mutant enzyme functions poorly in vivo, indicating that activation of the oxidase by phospholipids plays an important physiological role.
关键词：lipid activation ; lipid binding ; hydrophobic site ; conformational change ; proteolytic activation