Construction and characterization of a gradually inducible expression vector for Halobacterium salinarum, based on the kdp promoter.

ABSTRACT: Gradually inducible expression vectors which are governed by variations of growth conditions are powerful tools for gene expression of conditionally lethal mutants. Furthermore, controlled expression allows monitoring of overproduction of proteins at various stages in their expressing hosts. For Halobacterium salinarum, which is often used as a paradigm for halophilic archaea, such an inducible expression system is not available to date. Here we show that the kdp promoter (Pkdp), which facilitates gene expression upon K(+) limitation, can be used to establish such a system for molecular applications. Pkdp features a rather high expression rate, with an approximately 50-fold increase that can be easily varied by K(+) concentrations in the growth medium. Besides the construction of an expres

SUBMITTER: Kixmuller D 

PROVIDER: S-EPMC3302624 | biostudies-literature | 2012 Apr

REPOSITORIES: biostudies-literature