Open Accessσ s ‐Dependent regulation of yehZYXW , which encodes a putative osmoprotectant ABC transporter of Escherichia coli
Author(s) -
Checroun Claire,
Gutierrez Claude
Publication year - 2004
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2004.tb09650.x
Subject(s) - escherichia coli , atp binding cassette transporter , osmoprotectant , transporter , biology , escherichia coli proteins , genetics , chemistry , gene , biochemistry , amino acid , proline
The Escherichia coli yehZYXW operon encodes a putative osmoprotectant uptake system of the ABC transporter family. yehZ is identical to osmF , an osmotically inducible gene identified previously. Construction and analysis of a yehZ–lacZ transcriptional fusion demonstrated that yehZ is inducible not only by osmolarity, but also upon entry into stationary phase. The osmotic and growth‐phase regulations operate at a unique promoter, yehZp , and are totally dependent on the stress specific σ factor σ s . The yehZYXW encoded ABC transporter appears as an additional element of the global stress response controlled by σ s .