Difference between revisions of "Part:BBa K3520018"

Latest revision as of 03:46, 28 October 2020

Recombinant pHimarEm1 with Reflectin/signalpeptide/GFP TU

Description

This composite part consists of the Transcriptional Units BBa_K3520017(Signal peptide+Reflectin) and BBa_K3520020(GFP superfolder) of the Transcriptional Units where we used the promoter, RBS and terminator, (BBa_K3520007, BBa_K3520008 and BBa_K1172903) to ensure its successful translation in Flavobacterium johnsoniae. The same procedure was followed for sfGFP, but without the signal peptide, as it was not needed. Those genes are incorporated into the pHimarEm1 transposon that is found in pHimarEm1 plasmid, using Type IIS assembly (level 1) standard. The plasmid containing transcriptional units (GFP and reflectin) is inserted with conjugation in the flavobacteria using E. coli S17-1 as the donor of plasmid. After conjugation occurs, the two transcriptional units are transported into the Flavobacterium species genome.

Plasmid map

Figure 1: pHimarEm1 with superfolderGFP and reflectin insert.

iGEM KU Istanbul 2020

This part was designed during the Partnership of iGEM Athens 2020 and iGEM KU Istanbul 2020. The latter team is creating a communication scheme between humans and biological cells by morphing cells into lasers. By this technology, they will be able to detect changes inside and around cells and tissues. These cell lasers can be employed in diagnostics and therapeutic purposes alongside as a high throughput method in basic research.

iGEM Athens 2020

iGEM Athens 2020 team during the project MORPHÆ works with Flavobacteriia to produce a non-cellular structurally coloured biomaterial which will require the secretion of a biomolecule that Flavobacteriia do not normally secrete. Our hypothesis is that the formed matrix will have a structure similar to that of the biofilm and thus, it will provide the material with macroscopically the same colouration properties as the biofilm.

So these two teams above, collaborated in a creative way and iGEM Athens designed a cloning experiment in which Flavobacteriia will express reflectin with a signal peptide which will translocate it to the outer membrane and GFP superfolde. As a result, the biolaser designed by iGEM KU Istanbul will be able to track genetically modified Flavobacteriia.

Figure 2: Basics of a biolaser

Further information about Biolaser's Function

Biological laser or biolaser is an emerging concept with huge potential in biological and biomedical research. Biolaser is a new type of laser which has biological materials as part of its gain medium or optical feedback. Biolasers are very close to fluorescence microscopy where active molecules (fluorescent) emit light upon excitation by an external laser. However, biolasers are different from fluorescence with respect to optical feedback and gain. The light emitted from a biolaser is coherent, meaning it provides a high signal to noise ratio, consists of a narrow spectrum, and can focus on a small spot, whereas fluorescence radiation is dispersive and very weak compared to biolasers. We are developing a biological laser concept in which no artificial cavities will be used to confine light as opposed to conventional biolasers. Cavities we will be using are composed of natural biological materials which cover the membrane of the cell. So the biolaser concept is fully composed of biological materials. This goal will be achieved by genetically modifying cells to express silicatein and reflectin proteins as well as fluorescent proteins. Expressed silicatein and reflectins will be transported toward the membrane of the cell, and these proteins will be covering the inside and/or outside of the cell.