Team:IvyTech-South Bend

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Welcome to the Homepage of the
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DNA Architects of
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Project Description
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SouthBend & Mishawaka, Indiana, USA
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We are exploring ways to increase the sensitivity of bacteria based biosensors (for arsenic, pathogenic bacteria, and choliform bacteria) while making the "read-out" simultaneously high tech (bioluminescence) but in a low tech device that can be used by nontechnically-oriented people in places like the developing world.<a href="https://2009.igem.org/Help:Template/Examples">HERE</a>.
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You <strong>MUST</strong> have all of the pages listed in the menu below with the names specified. PLEASE keep all of your pages within your teams namespace. 
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''The Arsenator'': A Tuneable Biosensor for Arsenic!!!"''
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== Optimization of a Bacteria-based Biosensor for Arsenic in Drinking Water ==
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Millions of people worldwide are exposed to toxic levels of arsenic in drinking water. Bacteria have an efflux operon regulated by an arsenic sensitive inducible promoter. It is possible through recombinant DNA technology to isolate this promoter and combine it to a reporter system and transform bacteria to create a biosensor for arsenic. Induction of the arsenic-sensitive promoter occurs by the binding of arsenite to an inhibitory protein, de-repressing transcription. We have observed the arsenic responsive promoter from E. coli to have a consistent, low level of background induction. We have tested the hypothesis that by increasing the quantity of the inhibitory protein in the cell, we can quantifiably raise the threshold of the response. Our intention is to create a tunable biosensor to form the basis of a low-tech device that can reliably detect dangerous levels of arsenic in water for use in the developing world.
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Latest revision as of 03:19, 4 October 2012

Welcome to the Homepage of the
DNA Architects of
SouthBend & Mishawaka, Indiana, USA

The Arsenator: A Tuneable Biosensor for Arsenic!!!"


Optimization of a Bacteria-based Biosensor for Arsenic in Drinking Water


Millions of people worldwide are exposed to toxic levels of arsenic in drinking water. Bacteria have an efflux operon regulated by an arsenic sensitive inducible promoter. It is possible through recombinant DNA technology to isolate this promoter and combine it to a reporter system and transform bacteria to create a biosensor for arsenic. Induction of the arsenic-sensitive promoter occurs by the binding of arsenite to an inhibitory protein, de-repressing transcription. We have observed the arsenic responsive promoter from E. coli to have a consistent, low level of background induction. We have tested the hypothesis that by increasing the quantity of the inhibitory protein in the cell, we can quantifiably raise the threshold of the response. Our intention is to create a tunable biosensor to form the basis of a low-tech device that can reliably detect dangerous levels of arsenic in water for use in the developing world.


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