Team:Paris/Perspectives
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For 3 main reasons : | For 3 main reasons : | ||
- | First, when they genes 1 and 2 will be expressed the protease P10 will cleave gag that will self-assembled. | + | * First, when they genes 1 and 2 will be expressed the protease P10 will cleave gag that will self-assembled. |
- | Than when 123 will be expresse Env will get cleaved and self assembled with they products of gag and P10. | + | * Than when 123 will be expresse Env will get cleaved and self assembled with they products of gag and P10. |
- | Finaly, when 23 get activate we will increase the quantity of subunits delivered from the clivage of Env. | + | * Finaly, when 23 get activate we will increase the quantity of subunits delivered from the clivage of Env. |
In conclusion, our sytem will be very useful for the developpement of new drugs against HIV or in new kind of vectors in genetic therapy. | In conclusion, our sytem will be very useful for the developpement of new drugs against HIV or in new kind of vectors in genetic therapy. |
Revision as of 02:01, 28 October 2008
Biosynthetic Bottum-up approachA.DNA nanocar factoryThe field of artificial molecular machines and motors is growing at an astonishing rate and is attracting a great deal of interest in nanoscience. Research in the last decade has shown that species made of components like DNA or proteins are more attractive candidate. Our aims is to build by a bottom-up approched DNA nanocars that have the properties to produce energy in vitro. Our system is more efficient than a classic system because the FIFO order is very important: the first part will bind by complementarity with part 2 this new part will make the binding site for part 3. Moreover,in the FIFO the first in is the first out meaning that the 2-3 genes is still activate cause the one went off ,in our construction we success to bind only the higher part ,to built the lower part we need to express 2-3 gene that will finalize the car structure. The oscillation of our system can be assimilized to a factory when a certain amount of car his made, we need a little time off to permit them to move ,that will make the place for a new one ,his similar to make cookies when they cook you need to move them to put new ones in the oven.
Fig.1:biosynthesis by sequential expression of 3 DNA origami If we add in vitro a complementary miRNA to the red regions (fig.2), the competition of the miRNA will open the DNA strands by broken the hdrogen backbound this processes deliveres minimun ten time more energy than ATP biodegradation (winfree et.al), the instability of the miRNA may make this processe reversible. In conclusion, these kinds of DNA structures can be suitable, reversible and metastable DNA fuels and a new kind of cargo delivery machine. B.Artificial virus factoryWe can also produce a lot of differentes kinds of self-assembly structures like virus for example,HIV:
Fig2: genetic organization of HIV virus HIV can be produce by sequential expression of 3 genes gag,env and pol (Fig.2)those genes will be cleaved by protease P10 and than the subunits of the virus will self-assembled into mature virus. In our case, we will expressed gag p10 and finaly Pol (without Pol to avoid pathogenicity) the FIFO in this case will be essential. If you ask us why? For 3 main reasons :
In conclusion, our sytem will be very useful for the developpement of new drugs against HIV or in new kind of vectors in genetic therapy. Metabolic engineering of polyhydroxyalkanoate biosynthesis pathwaysHuman overpopulation combined with the current lifestyle urges the rational, efficient, and sustainable use of natural resources to produce environmentally friendly plastic materials such as polyhydroxyalkanoic acids (PHAs), whose production/degradation cycle reduces undesirable wastes and emissions. Our study is a new metabolic strategy to generate PHA-hyperproducer strains, that have the properties to be a sequential metabolic pathway, we believe the sequential expression may increases the production of purified PHA. Our strategy consists on replacing the RFP,CFP and YFP genes by the PhaA ,PhaB and PhaC genes in our final system (containing oscillation,FIFO,synchronisation modules). This strategy is more efficient than a constitutive activation for 3 main reasons:
Bibliography
Paul W. K. Rothemund
Paul W. K. Rothemund
Suvir Venkataraman, Robert M. Dirks, Paul W. K. Rothemund, Erik Winfree, Niles A. Pierce.
Georg Seelig, Bernard Yurke, Erik Winfree. |