Part:BBa_K1976055
Trypsin Fragment of Colicin E2 DNase with T7 Promoter
This part encodes the trypsin DNase fragment of colicin E2 with the RBS B0034 (part BBa_K1976048) and a T7 promoter.
Figure 1:Figure 5: growth of BL21 E. coli transformed with a): BBa_K1976054 and b): BBa_K1976055.
Usage
The colicin DNase fragment is an active DNase and can be used for DNA degradation. The T7 promoter is an inducable promoter wich ensures expression of the so called miniColicin after induction with IPTG.
Characteristics
The DNase trypsin fragment of colicin E2 consists of 137 residues what conforms to about one third to colicin. We used only one of the three domains of colicin since the metabolic burdon would be significant smaller. This fragment differs to the part 50 in 5 additional amino acids since a trypsin digestion described in the literature leaded to this fragment. So we wanted to check out any difference in the activities between the DNase fragment with and without theese additional amino acids. The activity tests showed that the so called miniColicin has functional DNase activity.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 84
- 1000COMPATIBLE WITH RFC[1000]
[1] Cascales et al, Colicin Biology, Microbiology and Molecular Biology Reviews, vol. 71, pp. 158-229, 2007
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