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Team:Uppsala/toxin-antitoxin-system
From 2013.igem.org
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<li><a href="https://2013.igem.org/Team:Uppsala/carotenoid-group">Carotenoid group</a></li> | <li><a href="https://2013.igem.org/Team:Uppsala/carotenoid-group">Carotenoid group</a></li> | ||
<li><a href="https://2013.igem.org/Team:Uppsala/chassi-group">Chassi group</a></li> | <li><a href="https://2013.igem.org/Team:Uppsala/chassi-group">Chassi group</a></li> | ||
| + | <li><a href="https://2013.igem.org/Team:Uppsala/advisors">Advisors</a></li> | ||
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| - | <li><a href="https://2013.igem.org/Team:Uppsala/attribution" id="list_type4"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/5/5d/Uppsala2013_Attributions.png"></a | + | <li><a href="https://2013.igem.org/Team:Uppsala/attribution" id="list_type4"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/5/5d/Uppsala2013_Attributions.png"></a></li> |
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<li><a href="https://2013.igem.org/Team:Uppsala/notebook" id="list_type3"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/3/36/Uppsala2013_Notebook.png"></a> | <li><a href="https://2013.igem.org/Team:Uppsala/notebook" id="list_type3"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/3/36/Uppsala2013_Notebook.png"></a> | ||
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<li><a href="https://2013.igem.org/Team:Uppsala/safety-form">Safety form</a></li> | <li><a href="https://2013.igem.org/Team:Uppsala/safety-form">Safety form</a></li> | ||
| + | <li><a href="https://2013.igem.org/Team:Uppsala/protocols">Protocols</a></li> | ||
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Revision as of 22:21, 3 October 2013
Toxin-antitoxin system
Keep your plasmids without antibiotic resistance
One of the challenges when creating synthetic systems in bacteria that serve a purpose besides increasing the fitness of the organism is that there is a negative selective pressure against keeping the system. Toxin-antitoxin systems can be used to make plasmids far more stabile without having to use antibiotics and antibiotic resistance. If a clone were to lose the plasmid, the toxin which usually has a longer half life than the antitoxin will kill the bacteria.
Above is an example of how a toxin-antitoxin system could be applied together with a gene X. If the gene is toxic or expressed strongly enough there will be a substantial evolutionary pressure to lose the plasmid during cell division. However if the gene is present on a plasmid with a toxin-antitoxin system would be lethal due to the loss of the antitoxin gene.
