Construction of an extended range whole-cell tetracycline biosensor by use of the tet(M) resistance gene

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An extended range whole-cell tetracycline biosensor strain was constructed by insertion of the tet(M) gene, encoding tetracycline resistance by ribosomal protection, into plasmid pTGFP2, which contains a transcriptional fusion between a tetracycline regulated promoter and the green fluorescent protein gene. Tetracycline, oxytetracycline, chlortetracycline and minocycline all effectively induced the resulting Escherichia coli MC4100/pTGM biosensor and similar dose-response characteristics were recorded by flow cytometry for all four compounds. The novel tetracycline biosensor was responsive to drug concentrations ranging from below 5 ng ml-1 to 16 µg ml-1, which represents a significant improvement of the original version.
Original languageEnglish
JournalFEMS Microbiology Letters
Volume253
Issue number2
Pages (from-to)201-205
ISSN0378-1097
DOIs
Publication statusPublished - 2005

Bibliographical note

Keywords: Biosensor; Flow cytometry; Tetracycline

ID: 87541