Team:Tokyo-NoKoGen

From 2014.igem.org

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<h2>Overview</h2>
<h2>Overview</h2>
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<!--<p> Many pesticides use neurotoxins that show toxicity not only to insects but also towards other species, including mammals. We therefore set out to construct an E. coli that can safely eradicate cockroaches but not affect mammals.</p>
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<!--<p> <p>Pesticides are not only harmful to insects, such as cockroaches, but also pose a risk to humans and the environment. A safe pesticide is greatly needed. Our project for iGEM 2014 is “<i>Exterminator coli</i>”, an <i>Escherichia coli</i> machine that exterminates insects such as roaches while being completely safe to mammals and the environment.</p><br>
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<p> Cockroaches and many other insects store their energy in the form of trehalose and use the enzyme trehalase to convert it to glucose when needed. Our engineered <i>E. coli</i> will overexpress the enzymes OtsA and OtsB to produce trehalose, and glucose-3-dehydrogenase to convert trehalose to 3,3’-diketotrehalose, an inhibitor of trehalase that is not toxic for mammals. Our engineered Exterminator coli will help eradicate roaches from homes without harming humans or pets.</p>-->
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<p>Roaches and many other insects store their energy in the form of trehalose, which can be converted to glucose, when needed, by the enzyme trehalase. However, mammals store their energy in the form of glycogen, which does not require trehalase for conversion to glucose. Trehalase inhibitors can therefore be used as a pesticide that can control roaches while being harmless for mammals and the environment.</p><br><br>
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<p> Pesticides that are harmful to insects, such as cockroaches, put humans and the environment at risk, so safety pesticides are needed. Our project for iGEM 2014 is “Exterminator coli”(Fig. 1). We engineered <i>Escherichia coli</i> (<i>E.coli</i>) that produces an inhibitor of a metabolic pathway for insects and exterminates insects such as roaches. In our project, we will produce a pesticide that has no effect on mammals and the environment using <i>E.coli</i>. </p><br>
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<p>We engineered <i>E. coli</i> that produces the trehalase inhibitor, 3,3´-diketotrehalose (3,3´-dkT), a pesticide that is harmless for the environment and mammals. Our engineered <i>E. coli</i> will overexpress trehalose 6-phosphate synthase (OtsA) and trehalose 6-phosphate phosphatase (OtsB), which convert glucose-6-phosphate and UDP-glucose to trehalose, and glucose-3-dehydrogenase (G3DH), which converts trehalose to 3,3’-dkT. We predict that <i>Exterminator coli</i> will continue to produce 3,3’-dkT even after it is ingested by the insect.</p>
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<p> Roaches and many other insects store their energy in the form of trehalose and use the enzyme trehalase to convert trehalose to glucose when needed. However, mammals store their energy in the form of glycogen, which does not require trehalase for conversion to glucose. Therefore trehalase inhibitor can be used as a pesticide which isn’t harmful to mammals but roaches. </p><br>
 

Revision as of 17:16, 17 October 2014