BME494s2013 Project Team3: Difference between revisions
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The natural Lac Operon has 2 controls that tightly regulates the production of the proteins necessary for the breakdown of lactose. In the presence of glucose, the Lac Operon inhibits the production of those proteins. When glucose is present, the lac repressor is bound to the operator, prohibiting the transcription of the proteins. In the presence of lactose, lactose is able to bind to the lac repressor initiating a conformation change in the repressor protein, causing it to release and allow for transcription. This, however, is not the only control in place. It is incredibly energy intensive to produce the proteins necessary for the breakdown of lactose, so when there is glucose present, the glucose will be metabolized first, even with some lactose present. This is accomplished by the presence of a second regulatory device, cyclic AMP (cAMP). cAMP is present only when there are very low levels of glucose found in the environment. cAMP serves as an activator and binds to RNA polymerase allowing for transcription of the output proteins. | |||
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Revision as of 13:01, 24 April 2013
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Overview & PurposeBy modifying the input and output for the Lac switch, it may be possible to produce materials such as plastics. The switch could be triggered by another environmental factor other than [IPTG], and instead of producing GFP, more useful materials like plastic could be an output. Currently, production of plastics is a very energy intensive process, and by using bacteria for the production, we can save energy and limit waste into the environment.
BackgroundThe natural Lac Operon has 2 controls that tightly regulates the production of the proteins necessary for the breakdown of lactose. In the presence of glucose, the Lac Operon inhibits the production of those proteins. When glucose is present, the lac repressor is bound to the operator, prohibiting the transcription of the proteins. In the presence of lactose, lactose is able to bind to the lac repressor initiating a conformation change in the repressor protein, causing it to release and allow for transcription. This, however, is not the only control in place. It is incredibly energy intensive to produce the proteins necessary for the breakdown of lactose, so when there is glucose present, the glucose will be metabolized first, even with some lactose present. This is accomplished by the presence of a second regulatory device, cyclic AMP (cAMP). cAMP is present only when there are very low levels of glucose found in the environment. cAMP serves as an activator and binds to RNA polymerase allowing for transcription of the output proteins.
Design: Our genetic circuitOUR GENE SWITCH:
Building: Assembly Scheme
Testing: Modeling and GFP Imaging
Human Practices
Our Team
Works Cited[1] Full reference. [2] Full reference. [3] Full reference.
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