Team:Goettingen/Focus Groups

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== Focus Group #1 - Selection / Swimming ==
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In this group it is all about creating a selection system that enables selecting the <i>E. coli</i> clones that are able to swim the fastest. In an extensive literature search we have collected different swimming media and swimming assays and have evaluated them with regard to our goal. The media can differ in various ways from each other and in our case the most important ones are the agar concentration and the nutrient content. The agar concentration has to be low enough to make swimming possible but high enough to form a semisolid structure. The nutrient content hast to be as low as possible without significantly inhibiting growth because the <i>E. coli</i> cells will only start to swim when there are no more nutrients in their current place. The low nutrient content is also necessary to observe whether a directed taxis in dependence on our tested molecule occurs. Through all these different experiments we will be able to set up a selection system that is quick, easy to handle and delivers reproducible results.
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Language: <img height="20", src="http://www.patrickreinke.de/igem/eng.jpg"> English, <img height="20", src="http://www.patrickreinke.de/igem/deu.jpg"> <a href="https://2012.igem.org/wiki/index.php?title=Team:Goettingen/Focus_Groups_deu"> Deutsch</a> <br>
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<table id="toc" class="toc"><tbody><tr><td><div id="toctitle"><h2>Contents</h2> <span class="toctoggle"><a href="javascript:toggleToc()" class="internal" id="togglelink"></a></span></div>
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== Focus Group #2 - Speed Improvement ==
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<li class="toclevel-1"><a href="#Focus_Groups"><span class="tocnumber">1</span> <span class="toctext">Focus Groups</span></a></li>
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<li class="toclevel-1"> <div style="text-indent:10px;"><a href="#Focus_Groups#1"><span class="tocnumber"></span> <span class="toctext">#1 - Selection / Swimming </span></a></li>
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<li class="toclevel-1"> <div style="text-indent:10px;"><a href="#Focus_Groups#2"><span class="tocnumber"></span> <span class="toctext">#2 - Speed Improvement </span></a></li>
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<li class="toclevel-1"> <div style="text-indent:10px;"><a href="#Focus_Groups#3"><span class="tocnumber"></span> <span class="toctext">#3 -  Chemoreceptor Library</span></a></li>
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In this group we focus on the improvement of <i>E. coli</i> swimming abilities. To achieve this, we chose a set of different genes that might be able to improve the swimming speed of <i>E. coli</i>. The expression levels of these genes are then controlled by using different promoters and the modified bacteria are tested on swimming agar plates. Such genes include the master regulator of motility and chemotaxis <i>flhDC</i> but also genes coding for parts of the bacterial flagellum such as <i>motB</i>. Furthermore, we use different <i>E. coli</i> strains for our experiments to identify differences in motility.
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<h2><b><a name="Focus_Groups#1"></a>#1 - Selection / Swimming</b></h2>
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== Focus Group #3 - Chemoreceptor Library ==
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In this group it is all about creating a selection system that enables selecting the <i>E. coli</i> clones that are able to swim the fastest. In an extensive literature search we have collected different swimming media and swimming assays and have evaluated them with regard to our goal. The media can differ in various ways from each other and in our case the most important ones are the agar concentration and the nutrient content. The agar concentration has to be low enough to make swimming possible but high enough to form a semisolid structure. The nutrient content hast to be as low as possible without significantly inhibiting growth because the <i>E. coli</i> cells will only start to swim when there are no more nutrients in their current place. The low nutrient content is also necessary to observe whether a directed taxis in dependence on our tested molecule occurs. Through all these different experiments we will be able to set up a selection system that is quick, easy to handle and delivers reproducible results.<br><br>
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<h2><b><a name="Focus_Groups#2"></a>#2 - Speed Improvement</b></h2>
 
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In this group we focus on the improvement of <i>E. coli</i> swimming abilities. To achieve this, we chose a set of different genes that might be able to improve the swimming speed of <i>E. coli</i>. The expression levels of these genes are then controlled by using different promoters and the modified bacteria are tested on swimming agar plates. Such genes include the master regulator of motility and chemotaxis <i>flhDC</i> but also genes coding for parts of the bacterial flagellum such as <i>motB</i>. Furthermore, we use different <i>E. coli</i> strains for our experiments to identify differences in motility.
 
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<h2><b><a name="Focus_Groups#3"></a>#3 - Chemoreceptor Library</b></h2>
 
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In this group, the main focus is to first clone the aspartate receptor Tar from <i>E. coli</i> under different strong constitutive promoters
In this group, the main focus is to first clone the aspartate receptor Tar from <i>E. coli</i> under different strong constitutive promoters
into vectors. After examination of effects overexpressing this chemotaxis receptor, the next challenge is to mutagenize this protein to receive
into vectors. After examination of effects overexpressing this chemotaxis receptor, the next challenge is to mutagenize this protein to receive
a chemoreceptor library. Ideally, the specificity of the receptor becomes altered due to mutation of the ligand binding sites important for chemical binding.
a chemoreceptor library. Ideally, the specificity of the receptor becomes altered due to mutation of the ligand binding sites important for chemical binding.
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Latest revision as of 19:12, 26 September 2012

Deutsch  / English 

Contents

Focus Group #1 - Selection / Swimming

In this group it is all about creating a selection system that enables selecting the E. coli clones that are able to swim the fastest. In an extensive literature search we have collected different swimming media and swimming assays and have evaluated them with regard to our goal. The media can differ in various ways from each other and in our case the most important ones are the agar concentration and the nutrient content. The agar concentration has to be low enough to make swimming possible but high enough to form a semisolid structure. The nutrient content hast to be as low as possible without significantly inhibiting growth because the E. coli cells will only start to swim when there are no more nutrients in their current place. The low nutrient content is also necessary to observe whether a directed taxis in dependence on our tested molecule occurs. Through all these different experiments we will be able to set up a selection system that is quick, easy to handle and delivers reproducible results.

Goett Coli select.jpg



Focus Group #2 - Speed Improvement

In this group we focus on the improvement of E. coli swimming abilities. To achieve this, we chose a set of different genes that might be able to improve the swimming speed of E. coli. The expression levels of these genes are then controlled by using different promoters and the modified bacteria are tested on swimming agar plates. Such genes include the master regulator of motility and chemotaxis flhDC but also genes coding for parts of the bacterial flagellum such as motB. Furthermore, we use different E. coli strains for our experiments to identify differences in motility.

Goett Coli speed.jpg

Focus Group #3 - Chemoreceptor Library


In this group, the main focus is to first clone the aspartate receptor Tar from E. coli under different strong constitutive promoters into vectors. After examination of effects overexpressing this chemotaxis receptor, the next challenge is to mutagenize this protein to receive a chemoreceptor library. Ideally, the specificity of the receptor becomes altered due to mutation of the ligand binding sites important for chemical binding.

Goett Coli nose.jpg


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