Basic Part
You will find on this page the basic parts which have been designed by our team. For further details, you can also go on [http://www.parts.igem.org parts page] and have a look to the corresponding BioBrick's page.
Mobilisation by a siderophore
desA, lysine decarboxylase coding sequence [http://parts.igem.org/Part:BBa_K1951000 BBa_K1951000]
This DNA sequence codes for a [http://metacyc.org/gene?orgid=META&id=SCO2782 Lysine descarboxylase] (Streptomyces) which is an enzyme from the lyase family that converts lysine to cadaverin. The enzyme releases the carbonyl group of the lysin amino acid. Cadaverin (or 1,5-diaminopentane) is a primary diamine which confers alcaline properties to the medium. The lysine decarboxylase is an enzyme induced the synthesis of which is promoted by anaerobiosis and an acidic pH.
In bacteriology, this enzyme is sought through the middle of Moeller lysine or medium lysine Taylor. This enzyme is also the first step in the production of desferrioxame B which is a siderophore.
desB, monooxygenase coding sequence [http://parts.igem.org/Part:BBa_K1951001 BBa_K1951001]
This sequence codes a [http://metacyc.org/gene?orgid=META&id=SCO2783-MONOMER monooxygenase] which is an enzyme that incorporate one hydroxyl group into substrates in many metabolic pathways. In this reaction, the two atoms of dioxygen are reduced to one hydroxyl and one H2O molecule by the concomitant oxidation of NAD(P)H. It is also the second step in the production of Desferrioxamine B in Streptomyces, allowing the transformation of cadeverine into N-hydroxycadaverine.
desC, acyl transferase coding sequence [http://parts.igem.org/Part:BBa_K1951002 BBa_K1951002]
desC is the coding sequence of [http://metacyc.org/gene?orgid=META&id=SCO2784-MONOMER DesC] which is an acyl transferase of the Desferrioxamine production pathway. It is the enzyme of the third step that transform N-hydroxycadaverin into N-acetyl N-hydroxucadaverine by an Acetyl-CoA dependent manner.
desD, Desferrioxamine biosynthesis coding sequence [http://parts.igem.org/Part:BBa_K1951003 BBa_K1951003]
This coding sequence codes [http://metacyc.org/gene?orgid=META&id=SCO2785-MONOMER DesD] of Streptomyces coelicolor, which is the last protein involved in the metabolic pathway of Desferrioxamine B. This enzyme is called Desferrioxamine biosynthesis protein or DesD and allows to transform N-acetyl N-hydroxycadaverine into Desferrioxamine B (by the transformation of 3 nucleoside triphosphate into 3 nucleoside 5'monophosphate-3-diphosphate).
Biosorption
fliC E. coli, flagellin coding sequence [http://parts.igem.org/Part:BBa_K1951005 BBa_K1951005]
This coding sequence codes the [http://ecocyc.org/gene?orgid=ECOLI&id=EG10321-MONOMER Flagellin (FliC)] protein from Escherichia coli strain. FliC is the main protein making up the flagelar filament and is involved in bacterial swimming.
It has been demonstrated that flagellin has the ability to adsorb precious metal such as platinum or gold.
fliC Desulfovibrio vulgaris, flagellin coding sequence [http://parts.igem.org/Part:BBa_K1951006 BBa_K1951006]
This sequence codes for [http://ecocyc.org/gene?orgid=DVUL882&id=GJIL-3010-MONOMER flagellin] which is the main protein involved for making the extracellular flagellum. Flagella are used by bacteria for swimming. It has been shown that the flagella from Desulfovibrio vulgaris strain Hildenborough can adsorb metallic nanoparticules as gold or platinum.
CsgA, curlin coding sequence [http://parts.igem.org/Part:BBa_K1951007 BBa_K1951007]
[http://ecocyc.org/gene?orgid=ECOLI&id=EG11489-MONOMER CsgA] is the major and structural subunit of the curli fimbriae. Curli are coiled surface structures that assemble preferentially at growth temperatures below 37 degrees Celsius. Curli are the major proteinaceous component of a complex extracellular matrix produced by many Enterobacteriaceae. They were first discovered in the late 1980s on Escherichia coli strains that caused bovine mastitis, and have since been implicated in many physiological and pathogenic processes of E. coli and Salmonella spp. Curli fibers are involved in adhesion to surfaces, cell aggregation, and biofilm formation. They also mediate host cell adhesion and invasion, and they are potent inducers of the host inflammatory response. It has been shown that amyloid proteins, like curli, can bind some metals [1] and thats why we wanted to use it in our project.
- ↑ [http://www.nature.com/nnano/journal/v11/n4/full/nnano.2015.310.html Sreenath Bolisetty and Raffaele Mezzenga 2016, Nature Nanotechnology]
