Oxygen regulation of the ccoN gene encoding a component of the cbb3 oxidase in Rhodobacter sphaeroides 2.4.1T:: Involvement of the FnrL protein

被引：47

作者：

Mouncey, NJ ^{[1
]}

Kaplan, S ^{[1
]}

机构：

[1] Univ Texas, Hlth Sci Ctr, Dept Microbiol & Mol Genet, Sch Med, Houston, TX 77030 USA

来源：

JOURNAL OF BACTERIOLOGY | 1998年 / 180卷 / 08期

关键词：

D O I：

10.1128/JB.180.8.2228-2231.1998

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

The ccoNOQP gene cluster of Rhodobacter sphaeroides 2.4.1(T) encodes a cbb(3), cytochrome oxidase which is utilized in oxygen-limited conditions for aerobic respiration. The P-galactosidase activity of a ccoN::lacZ transcriptional fusion,vas low under high (30%)-oxygen and anaerobic growth conditions. Maximal ccoN::lacZ expression was observed when the oxygen concentration was lowered to 2%. In an FnrL mutant, ccoN::lacZ expression was significantly lower than in the wild-type pe strain, suggesting that FnrL is a positive regulator of genes encoding the cbb(3) oxidase.

引用

页码：2228 / 2231

页数：4

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