Source:
Generated By: https://synbiohub.org/public/igem/igem2sbol/1
Created by: Oumnia KARIM
Date created: 2016-10-13 11:00:00
Date modified: 2016-10-17 11:22:43
AF-A : operon of antifungal peptides
| Types | DnaRegion |
| Roles | engineered_region Composite |
| Sequences | BBa_K1937007_sequence (Version 1) |
Description
(Chassis E.coli, carrier plasmid pSB1C3, part destined for use in Bacillus subtilis)Length: 1006 bp
Background:
AF-A is a part designed to be combined with AF-B to form an operon of 5 antifungal peptides. The interest of using several antifungals is to have a broad spectrum of fungi target, because each antifungal has its own characteristics.The peptides were designed to be expressed and secreted by Bacillus subtilis. This operon was also initially designed to be expressed under the control of the pNagA or pNagP promoter (BBa_K1937003 and BBa_K1937005 respectively). In spite of several cloning strategies, the AF-B construction was not obtained, likely due to the toxicity of one of the peptides for Bacillus subtilis.
This BioBrick is a part developed by the Toulouse 2016 iGEM team (http://2016.igem.org/Team:Toulouse_France)
Notes
This part encodes two genes encoding antifungal peptides: a cutted Metchnikowin and the D4E1. We created it with the end of the Metchnikowin gene because we found out that only this part of the gene had the antifungal property(http://www.ebi.ac.uk/interpro/entry/IPR012513). The beginning of the gene translates for a propeptide. This gene comes from drosophila and translates a proline-rich peptide whose expression is immune-inducible. The peptide is active against fungi.The D4E1 gene is synthetic and translates a peptide that complexes with cholesterol, current in non-germinated conidia. This synthetic peptide is more resistant than the natural peptide CecroprineA because proteases from fungi have difficulties to degrade the synthetic one (http://www.nrcresearchpress.com/doi/abs/10.1139/w98-032?journalCode=cjm#.V_pRgJOLT6Y).So that each antifungal can be secreted out of the cell, it was necessary to add a sequence called AmyE that enables the transport of molecules outside of the cell. As AmyE is used twice in this Biobrick, we modified the AmyE sequences to avoid homologous recombination while keeping the same protein sequence. The NheI restriction site was added after the RBS to allow promoter swapping with biobrick BAAXXXX or BAAXXXX. SacII and SalI restriction site were added to built the full 5 peptides operon.
Source
This gene comes from drosophila and translates a proline-rich peptide whose expression is immune-inducible. The peptide is active against fungi.The D4E1 gene is synthetic and translates a peptide that complexes with cholesterol, current in non-germinated conidia. This synthetic peptide is more resistant than the natural peptide CecroprineA because proteases from fungi have difficulties to degrade the synthetic one (http://www.nrcresearchpress.com/doi/abs/10.1139/w98-032?journalCode=cjm#.V_pRgJOLT6Y).| Sequence Annotation | Location | Component / Role(s) |
| Pveg RBS Metchnikowin amyE for cutted Metchnikowin Cutted Metchnikowin RBS D4E1 AmyE for D4E1 D4E1 | 1,237 238,249 253,375 376,453 454,465 466,588 589,648 | feature/promoter promoter feature/rbs ribosome_entry_site feature/protein CDS CDS feature/protein ribosome_entry_site feature/rbs feature/protein CDS CDS feature/protein |