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© Mélanie Falord, Tarek Msadek, Jean-Marc Panaud
Staphylococcus aureus "golden staph" in scanning electron microscopy.
Publication : Molecular microbiology

Distinct control sites located upstream from the levansucrase gene of Bacillus subtilis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Molecular microbiology - 01 Sep 1987

Klier A, Fouet A, Débarbouillé M, Kunst F, Rapoport G

Link to Pubmed [PMID] – 2835582

Mol. Microbiol. 1987 Sep;1(2):233-41

The sacR regulatory region, which modulates the expression of sacB, the structural gene for levansucrase, was separated into two parts: an upstream region which carries a constitutive promoter and a downstream region which carries a palindromic structure. Three types of fusions were constructed in which the aphA3 gene coding for kanamycin resistance of Streptococcus faecalis was placed downstream from different deleted sacR regions. Other fusions were constructed by inserting a promoter from phage SPO1 upstream from the sacB gene and part of the sacA region. A third kind of fusion was constructed in which the palindromic structure was flanked by a heterologous promoter and a heterologous structural gene. After introduction of these fusions into the chromosomal DNA of mutants affected in sacB regulation, it was possible to reveal different targets for the regulatory genes sacU, sacQ and sacS: the sacU and sacQ genes act on a region located near or just upstream from the promoter, and the sacS gene, which is involved in the induction process, acts on the palindromic structure.

http://www.ncbi.nlm.nih.gov/pubmed/2835582