Regulation of epidermin biosynthetic genes by EpiQ
| Autor: | Andreas Peschel, Friedrich Götz, Thomas Kupke, Stefan Stevanovic, Johannes Augustin |
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| Rok vydání: | 1993 |
| Předmět: |
Transcription
Genetic Inverted repeat Recombinant Fusion Proteins Molecular Sequence Data Biology medicine.disease_cause Peptides Cyclic Microbiology Primer extension Open Reading Frames Bacterial Proteins Bacteriocins Transcription (biology) Escherichia coli Staphylococcus epidermidis medicine Amino Acid Sequence Promoter Regions Genetic Molecular Biology Peptide sequence Sequence Deletion Base Sequence Promoter Gene Expression Regulation Bacterial Lantibiotics Molecular biology Anti-Bacterial Agents Open reading frame Genes Bacterial Peptides |
| Zdroj: | Molecular Microbiology. 9:31-39 |
| ISSN: | 1365-2958 0950-382X |
| Popis: | We investigated the role of epiQ in the biosynthesis of the lantibiotic epidermin. epiQ was essential for epidermin production. It was shown that EpiQ controls epidermin production by transcriptionally activating the epiA promoter, used for transcription of most of the epidermin biosynthetic genes. Additional copies of epiQ increased epidermin production in the epidermin-producing wild-type strain Staphylococcus epidermidis Tü3298. The epiA promoter region was characterized by primer extension analysis. Two inverted repeats, putative operator sites for EpiQ binding, are located upstream of the -35 region and one is localized downstream of the -10 region. Crude protein extracts from S. epidermidis Tü3298 and epiQ expressing Escherichia coli cells led to gel mobility shifts of a DNA fragment bearing the inverted repeat which is located immediately upstream of the -35 region. DNA fragments bearing the other two inverted repeats were not shifted. The epiQ gene product could be detected by overexpression in the E. coli T7 system using antiserum raised against synthetic peptides of EpiQ. Furthermore, EpiQ, like other DNA-binding proteins, was shown to bind strongly to heparin sepharose. |
| Databáze: | OpenAIRE |
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