Part:BBa_K3350862
yqjF3rd (promoter)
Landmines pose a great threat to human lives and health. In our project, we designed a Bio-optical Landmine Detection device to achieve landmine detection with high sensitivity.
Our yqjF promoter (BBa_K1316002) was originally involved in the metabolism of aromatic compounds in bacteria and was later found to respond to chemicals, such as 2,4-dinitrotoluene (DNT) constantly released from landmines. However, previously reported detection limit of the yqjF promoter is as high as 25 mg/L of DNT; thus, we must improve the sensitivity of the yqjF promoter for its practical application.
We optimized the response of the yqjF promoter to DNT in the following three aspects. We used semi-rational mutagenesis and error-prone PCR mutagenesis to randomly mutate the yqjF promoter and obtained its mutant versions yqjF1st and yqjF2nd (BBa_K3350859 and BBa_K3350860) with reduced DNT detection thresholds. After combining the favorable mutation sites of the yqjF1st and yqjF2nd, we generated the yqjF3rd promoter that show much reduced DNT detection threshold of 5 mg/L versus 25 mg/L of the wild-type yqjF promoter.
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
//dna
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