Part:BBa_K1344000
1018 synthetic cationic peptide
Peptide 1018 is a synthetic cationic peptides, derived from natural peptides such as the human cathelicidin LL-37 and the bovine peptide indolicidin. This part work as biofilm inhibitory compounds. Anti-biofilm peptides are similar to cationic antimicrobial peptides (which are active against planktonic bacteria), comprising both cationic and hydrophobic amino acids (Nunez CF et al, 2014).
Usage and Biology
Peptide 1018 is small cationic peptide under T5 promoter (inducible promoter). Peptide 1018 in particular concentration can be toxic for bacterial vector. Isopropyl thiogalactoside (IPTG) is analogue of lactose that is able to induce activation of T5 promoter to start transcription.
Aim
To examine in which concentration of IPTG that can be toxic for E.coli as bacterial vector
Result
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Discussion
From the experiment above we expected that IPTG induction will activate peptide 1018 trancription which is able to inhibit the growth of E.coli and can reduce the number of cells if the cells grow together with IPTG in the start point. In this experiment we the activation was conducted when OD 0.1 and dilution 1:20 without incubation before. The data above show no inhibitory effect of IPTG as increase the concentration. But when we measured the OD600, all treatment show lower in OD600 of IPTG 0 mM. We assumed that the peptide 1018 still working, even though we need more data and incubation period before treated with IPTG.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
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