Organization of the nar genes at the chlZ locus.
The two membrane-bound respiratory nitrate reductases of Escherichia coli are encoded by distinct operons at two different loci, chlC and chlZ, on the chromosome. The chlZ locus includes a narK homologue, narU, encoding a nitrite extrusion protein, and narZYWV encoding nitrate reductase Z. No apparent homologue to the narXL operon has been found. Homology between narU and narK on the one hand and narZYWV and narGHJI on the other hand is limited to the coding regions.
Bonnefoy
V
V
Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et Microbiologie, Marseille, France. bonnefoy@ibsm.cnrs-mrs.fr
Ratouchniak
J
J
Blasco
F
F
Chippaux
M
M
D002876:Chromosomes, Bacterial / Q000235:genetics; D004269:DNA, Bacterial / Q000032:analysis; D004926:Escherichia coli / Q000201:enzymology* / Q000235:genetics*; D018628:Gene Dosage; D015964:Gene Expression Regulation, Bacterial / Q000235:genetics; D015971:Gene Expression Regulation, Enzymologic / Q000235:genetics; D005798:Genes, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D009565:Nitrate Reductases / Q000235:genetics*; D009573:Nitrites / Q000378:metabolism; D010957:Plasmids
D004269:DNA, Bacterial; D009573:Nitrites; D009565:Nitrate Reductases