Construction and Characterization of a Gradually Inducible Expression Vector for Halobacterium salinarum, Based on the kdp Promoter

Autor(en): Kixmueller, Dorthe
Greie, Joerg-Christian
Stichwörter: ARCHAEA; ARCHAEBACTERIA; Biotechnology & Applied Microbiology; COMPLEX; DNA; GENE; HALOFERAX-ALICANTEI; HALOPHILIC BETA-GALACTOSIDASE; Microbiology; PROTEINS; TRANSCRIPTION; VOLCANII
Erscheinungsdatum: 2012
Herausgeber: AMER SOC MICROBIOLOGY
Journal: APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volumen: 78
Ausgabe: 7
Startseite: 2100
Seitenende: 2105
Zusammenfassung: 
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 expression vector, our work describes the characterization of expression patterns and, thus, offers a gradually inducible expression system to the scientific community.
ISSN: 00992240
DOI: 10.1128/AEM.07155-11

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