OXYGEN REGULATION OF THE CCON GENE ENCODING A COMPONENT OF THE CBB(3)OXIDASE IN RHODOBACTER-SPHAEROIDES 2.4.1(T) - INVOLVEMENT OF THE FNRLPROTEIN

Authors
MOUNCEY NJ KAPLAN S
Citation
Nj. Mouncey et S. Kaplan, OXYGEN REGULATION OF THE CCON GENE ENCODING A COMPONENT OF THE CBB(3)OXIDASE IN RHODOBACTER-SPHAEROIDES 2.4.1(T) - INVOLVEMENT OF THE FNRLPROTEIN, Journal of bacteriology, 180(8), 1998, pp. 2228-2231
Citations number
23
Categorie Soggetti
Microbiology
Journal title
Journal of bacteriology → ACNP
ISSN journal
00219193
Volume
180
Issue
8
Year of publication
1998
Pages
2228 - 2231
Database
ISI
SICI code
0021-9193(1998)180:8<2228:OROTCG>2.0.ZU;2-B
Abstract
The ccoNOQP gene cluster of Rhodobacter sphaeroides 2.4.1(T) encodes a cbb(3), cytochrome oxidase which is utilized in oxygen-limited condit ions for aerobic respiration. The P-galactosidase activity of a ccoN:: lacZ transcriptional fusion,vas low under high (30%)-oxygen and anaero bic 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 strai n, suggesting that FnrL is a positive regulator of genes encoding the cbb(3) oxidase.