Team:Uppsala/chassi

From 2013.igem.org

(Difference between revisions)
 
(38 intermediate revisions not shown)
Line 13: Line 13:
</style>
</style>
 +
 +
<script type="text/javascript">
 +
/*Acts once the document is loaded*/ $(document).ready(function() { /*Move the tn-main-wrap as child of <body>*/ $("#tn-main-wrap-wrap").prependTo($("body")); /*Move the menubars in the tn-main-wrap*/ $("#menubar.left-menu").appendTo($("#tn-main-wrap")); $("#menubar.right-menu").appendTo($("#tn-main-wrap"));
 +
/*Spoiler JS*/ $(".tn-spoiler div").slideUp(); $(".tn-spoiler a").click(function(e) { e.preventDefault(); $(".tn-spoiler-active").removeClass("tn-spoiler-active"); $(this).parent().addClass("tn-spoiler-active"); $(".tn-spoiler").not(".tn-spoiler-active").children("div").slideUp(); $(".tn-spoiler-active").children("div").slideToggle(); });
 +
/*Add favicon*/ $("link[rel='shortcut icon']").remove(); $("head").append("<link rel='shortcut icon' type='image/png' href='https://static.igem.org/mediawiki/2013/6/6d/Uppsalas-cow-con.png'>"); });
 +
</script>
 +
 +
<script type="text/javascript">
 +
function preloadimages(arr){
 +
    var newimages=[]
 +
    var arr=(typeof arr!="object")? [arr] : arr //force arr parameter to always be an array
 +
    for (var i=0; i<arr.length; i++){
 +
        newimages[i]=new Image()
 +
        newimages[i].src=arr[i]
 +
    }
 +
}
 +
 +
</script>
</head>
</head>
Line 24: Line 42:
<!--Contains our top header-->
<!--Contains our top header-->
-
<div id= "header">  
+
<div id= "header">  
<!-- Contains sub-logo picture -->
<!-- Contains sub-logo picture -->
-
<div id="igem_logo"><a href="https://2013.igem.org/Main_Page"><img class="igem_logo" src="https://static.igem.org/mediawiki/2013/5/59/IGEMlogo.png"></a></div>
+
<div id="igem_logo"><a href="https://2013.igem.org/Team:Uppsala"><img class="igem_logo" src="https://static.igem.org/mediawiki/2013/e/e0/Uppsala2013_IGEMlogo.png"></a></div>
-
<div id="igem"><a href="https://2013.igem.org/Main_Page"><img class="igem" src="https://static.igem.org/mediawiki/2013/9/9c/Uppsala_IGEM_log_blue.png"></a></div>
+
<div id="igem"><a href="https://2013.igem.org/Main_Page"><img class="igem" src="https://static.igem.org/mediawiki/2013/b/b8/Uppsala2013_Uppsala_IGEM_log_blue.png"></a></div>
 +
 
 +
<img class="slogan" src="https://static.igem.org/mediawiki/2013/a/ad/Uppsala2013_Header.png">
</div>  
</div>  
Line 44: Line 64:
<li><a href="https://2013.igem.org/Team:Uppsala/project" id="list_type1"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/a/aa/Uppsala2013_Project.png"></a>
<li><a href="https://2013.igem.org/Team:Uppsala/project" id="list_type1"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/a/aa/Uppsala2013_Project.png"></a>
<ul>
<ul>
-
<li><a href="https://2013.igem.org/Team:Uppsala/overview">Overview</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/chassi">Chassi</a>
<li><a href="https://2013.igem.org/Team:Uppsala/chassi">Chassi</a>
<ul>
<ul>
Line 50: Line 70:
<li><a href="https://2013.igem.org/Team:Uppsala/promoters">Promoters</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/promoters">Promoters</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/reporter-genes">Reporter genes</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/reporter-genes">Reporter genes</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/affinity-tags">Toxin-antitoxin system</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/toxin-antitoxin-system">Toxin-antitoxin system</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/vectors">Vectors</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/vectors">Vectors</a></li>
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/signal-peptide">Signal peptide</a></li>
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/signal-peptide">Signal peptide</a></li>
Line 57: Line 77:
                                                 <li><a href="https://2013.igem.org/Team:Uppsala/metabolic-engineering">Metabolic engineering</a>
                                                 <li><a href="https://2013.igem.org/Team:Uppsala/metabolic-engineering">Metabolic engineering</a>
                                                     <ul>
                                                     <ul>
-
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/p-coumaric-acid">P-coumaric acid</a></li>
+
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/p-coumaric-acid">p-Coumaric acid</a></li>
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/resveratrol">Resveratrol</a></li>
                                                                 <li><a href="https://2013.igem.org/Team:Uppsala/resveratrol">Resveratrol</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/lycopene">Lycopene</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/lycopene">Lycopene</a></li>
Line 63: Line 83:
                                                                 <li><a  
                                                                 <li><a  
href="https://2013.igem.org/Team:Uppsala/saffron">Saffron</a></li>
href="https://2013.igem.org/Team:Uppsala/saffron">Saffron</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/astraxantin">Astaxanthin</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/astaxanthin">Astaxanthin</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/zeaxantin">Zeaxanthin</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/zeaxanthin">Zeaxanthin</a></li>
</ul></li>
</ul></li>
</li>  
</li>  
Line 70: Line 90:
href="https://2013.igem.org/Team:Uppsala/miraculin">Miraculin</a></li>
href="https://2013.igem.org/Team:Uppsala/miraculin">Miraculin</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/chromoproteins">Chromoproteins</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/chromoproteins">Chromoproteins</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/safety">Safety experiment</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/safety-experiment">Safety experiment</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/result">Result</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/results">Results</a></li>
Line 78: Line 98:
<li><a href="https://2013.igem.org/Team:Uppsala/modeling" id="list_type1"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/6/63/Uppsala2013_Modeling.png"></a>
<li><a href="https://2013.igem.org/Team:Uppsala/modeling" id="list_type1"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/6/63/Uppsala2013_Modeling.png"></a>
<ul>
<ul>
-
<li><a href="https://2013.igem.org/Team:Uppsala/resveratrol-pathway">Resveratrol pathway </a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/P-Coumaric-acid-pathway">Kinetic model</a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/modeling-tutorial">Modeling tutorial </a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/modeling-tutorial">Modeling tutorial </a></li>
 +
 +
<li><a href="https://2013.igem.org/Team:Uppsala/toxicity-model">Toxicity model</a></li>
</ul></li>
</ul></li>
<li><a href="https://2013.igem.org/Team:Uppsala/parts" id="list_type2"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/e/eb/Uppsala2013_parts.png"></a></li>
<li><a href="https://2013.igem.org/Team:Uppsala/parts" id="list_type2"><img class="nav-text" src="https://static.igem.org/mediawiki/2013/e/eb/Uppsala2013_parts.png"></a></li>
Line 88: Line 110:
<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>
+
                                                <li><a href="https://2013.igem.org/Team:Uppsala/advisors">Advisors</a></li>
 +
</ul></li>
</ul></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/hp" id="list_type3"><img class="nav-text"      src="https://static.igem.org/mediawiki/2013/b/b8/Uppsala2013_HP.png"></a>
+
<li><a href="https://2013.igem.org/Team:Uppsala/human-practice" id="list_type3"><img class="nav-text"      src="https://static.igem.org/mediawiki/2013/b/b8/Uppsala2013_HP.png"></a>
<ul>
<ul>
-
<li><a href="https://2013.igem.org/Team:Uppsala/Yoghurtproducts">Yoghurt products</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/yoghurt">Yoghurt +</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/synbioday">SynBio day</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/synbioday">SynBioDay</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/safety">Bioethics and safety</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/biosafety-and-ethics">Biosafety and ethics</a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/society">Society and outreach</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/public-opinion">Public opinion </a></li>
-
<li><a href="https://2013.igem.org/Team:Uppsala/highschool-outreach">High school outreach</a></li>
+
                                                <li><a href="https://2013.igem.org/Team:Uppsala/Outreach">High school & media </a></li>
-
                                                <li><a href="https://2013.igem.org/Team:Uppsala/outreach">Media outreach</a></li>
+
<li><a href="https://2013.igem.org/Team:Uppsala/bioart">BioArt</a></li>
 +
<li><a href="https://2013.igem.org/Team:Uppsala/LactonutritiousWorld">A LactoWorld</a></li>
 +
<li><a href="https://2013.igem.org/Team:Uppsala/killswitches">Killswitches</a></li>
 +
<li><a href="https://2013.igem.org/Team:Uppsala/realization">Patent</a></li>
</ul></li>
</ul></li>
<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>  
<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>  
<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>
                                     <ul>
                                     <ul>
-
                                         <li><a href="https://2013.igem.org/Team:Uppsala/protocol">Protocol</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/notebook">Lab journal</a></li>
+
                                         <li><a href="https://2013.igem.org/Team:Uppsala/protocols">Protocols</a></li>
                                     </ul></li>
                                     </ul></li>
</ul>
</ul>
-
</div>
+
</div>  
</div>
</div>
Line 117: Line 143:
<h1 class="main-title_no_border"> Lactobacillus as the new probiotic chassi for iGEM </h1>
<h1 class="main-title_no_border"> Lactobacillus as the new probiotic chassi for iGEM </h1>
-
<div id="chassi_text_top"> There are many challenges for anyone who wants to do synthetic biology in a new less common organism, like getting familiar with new protocols and techniques. But another major problem is that there is a lack of fundamental parts available like plasmids, reporter genes and promoters. A big part of our project has been to develop these basic parts and make them biobrick compatible. This is done in order to open up the Lactobacillus genus as the new probiotic chassi of choice for the iGEM community. We also intend to use it ourselves for doing metabolic engineering in lactobacillus. For this we have created two shuttle vectors, a library of constitutive promoters and a couple of reporter genes that should work in both e. coli and lactobacillus. Because E. coli is substantially easier and faster to work with the intention is to allow construction and some characterisation in E. coli and then in the end transfer the complete construct to lactobacillus. </div>
+
There are many challenges for anyone who wants to do synthetic biology in a new less common organism, like getting familiar with new protocols and techniques. But another major problem is that there is a lack of fundamental parts available like plasmids, reporter genes and promoters. A big part of our project has been to develop these basic parts and make them biobrick compatible. This is done in order to open up the Lactobacillus genus as the new probiotic chassi of choice for the iGEM community. We also intend to use it ourselves for doing metabolic engineering in Lactobacillus. For this we have worked to create two <a href="https://2013.igem.org/Team:Uppsala/vectors"> shuttle vectors </a>, a library of <a href="https://2013.igem.org/Team:Uppsala/promoters"> constitutive promoters </a> and a couple of <a href="https://2013.igem.org/Team:Uppsala/reporter-genes"> reporter genes </a> that should be functional in both E. coli and Lactobacillus.  
 +
  E. coli is substantially easier and faster to work with. Therefore the intention is to allow construction and some characterisation to first be done in E. coli, the construct can then later be transformed to Lactobacillus.  
<div id="shortcut_pic">  
<div id="shortcut_pic">  
Line 124: Line 151:
<div id="chassi_pic_promoter">  
<div id="chassi_pic_promoter">  
-
<a href="https://2013.igem.org/Team:Uppsala/promoters"> <img class="chassi_pic" src="https://static.igem.org/mediawiki/2013/9/98/Uppsala2013_Promoter_new.png" on mouseover="this.src='https://static.igem.org/mediawiki/2013/e/e2/Uppsala2013_PromoterPushed.png'" onmouseout="this.src='https://static.igem.org/mediawiki/2013/9/98/Uppsala2013_Promoter_new.png'" /></a>
+
<a href="https://2013.igem.org/Team:Uppsala/promoters"> <img class="chassi_pic" src="https://static.igem.org/mediawiki/2013/9/98/Uppsala2013_Promoter_new.png" onmouseover="this.src='https://static.igem.org/mediawiki/2013/e/e2/Uppsala2013_PromoterPushed.png'" onmouseout="this.src='https://static.igem.org/mediawiki/2013/9/98/Uppsala2013_Promoter_new.png'" /> </a>
</div>
</div>
Line 155: Line 182:
</div> <!-- Closing div for shortcut_pic -->
</div> <!-- Closing div for shortcut_pic -->
-
<div id="chassi_text_mid"> ello </div>
 
<div id="container_mini_pic">  
<div id="container_mini_pic">  
<a href="https://2013.igem.org/Team:Uppsala/promoters">
<a href="https://2013.igem.org/Team:Uppsala/promoters">
-
<div id="promoter_div">
+
<div class="text_box_in_the_box" id="promoter_div">
<div id="promoter_title"> <h3> Promoters </h3> </div>
<div id="promoter_title"> <h3> Promoters </h3> </div>
<div class="promoter_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/f/f7/Uppsala2013_Promoter_mini.png"> </div>
<div class="promoter_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/f/f7/Uppsala2013_Promoter_mini.png"> </div>
</a>
</a>
-
<div id="promoter_text"> Different constructs need different levels of expression. We have constructed and characterised a library of constitutive promoters of different strengths. These are based on a consensus sequence from promoters in Lactobacillus but have been shown to also work very well in E. coli.  
+
<div id="promoter_text"> Different constructs need different levels of expression. We have constructed and characterised a library of constitutive promoters of different strengths. These are based on a consensus sequence from promoters in Lactococcus lactis but have also been shown to work very well in E. coli and Lactobacillus.  
-
<div id="chassi_mini_images"> <a href=" "> <img class="chassi_mini_images" src=" "></a> </div>
+
<div id="chassi_mini_images"> <a href="https://2013.igem.org/Team:Uppsala/promoters#b1"> <img class="chassi_mini_images" src="https://static.igem.org/mediawiki/2013/7/72/Uppsala2013_Facspic.png"></a> </div>
</div>
</div>
</div>
</div>
-
<div id="reporter_div">
+
<div class="text_box_in_the_box" id="reporter_div">
<a href="https://2013.igem.org/Team:Uppsala/reporter-genes">  
<a href="https://2013.igem.org/Team:Uppsala/reporter-genes">  
<div id="reporter_title"> <h3> Reporter genes </h3> </div>
<div id="reporter_title"> <h3> Reporter genes </h3> </div>
<div class="reporter_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/c/ca/Uppsala2013_Reporter_mini.png"> </div>
<div class="reporter_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/c/ca/Uppsala2013_Reporter_mini.png"> </div>
</a>
</a>
-
<div id="reporter_text"> Many techniques and methods require fluorescent reporter genes to function. While some fluorescent proteins works poorly in Lactobacillus we have biobricked a codon-optimized version of mCherry that has been shown to work. This has been done according to assembly standard 25 to allow it to be used as a fusion protein.  
+
<div id="reporter_text"> Many techniques and methods require fluorescent reporter genes to function. While some fluorescent proteins work poorly in Lactobacillus we have biobricked a codon-optimized version of mCherry that has been shown to work. This has been done according to assembly standard 25 to allow it to be used as a fusion protein.  
-
<div id="chassi_mini_images"> <a href=" "> <img class="chassi_mini_images" src=" "></a> </div>
+
<div id="chassi_mini_images"> <a href="https://2013.igem.org/Team:Uppsala/reporter-genes#b1"> <img class="chassi_mini_images" src="https://static.igem.org/mediawiki/2013/3/39/MCherry.png"> </a> </div>
</div>
</div>
</div>
</div>
-
<div id="toxin_div">
+
<div class="text_box_in_the_box" id="toxin_div">
<a href="https://2013.igem.org/Team:Uppsala/toxin-antitoxin-system">
<a href="https://2013.igem.org/Team:Uppsala/toxin-antitoxin-system">
<div id="toxin_title"> <h3> Toxin-antitoxin </h3> </div>
<div id="toxin_title"> <h3> Toxin-antitoxin </h3> </div>
<div class="toxin_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/1/12/Uppsala2013_toxin-antitoxin_symbol_mini.png"> </div>
<div class="toxin_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/1/12/Uppsala2013_toxin-antitoxin_symbol_mini.png"> </div>
</a>
</a>
-
<div id="toxin_text"> A major challenge in synthetic biology is that there is a selective pressure against metabolically taxing systems. In nature, many natural plasmids contain genes coding for a toxin and the associated antitoxin. These systems can significantly increase the segregational stability of plasmids and is an easy to use alternative to chromosomal integration.  
+
<div id="toxin_text"> A major challenge in synthetic biology is that there is a selective pressure against metabolically taxing systems. In nature, many natural plasmids contain genes coding for a toxin and the associated antitoxin. These systems can significantly increase the segregational stability of plasmids and is an easy to use alternative to chromosomal integration for some applications.  
-
<div id="chassi_mini_images"> <a href=" "> <img class="chassi_mini_images" src=" "></a> </div>
+
<div id="chassi_mini_images"> <a href="https://2013.igem.org/Team:Uppsala/toxin-antitoxin-system#b1"> <img class="chassi_mini_images" src="https://static.igem.org/mediawiki/2013/0/0f/Uppsala2013_Toxin_antitoxin_system_with_Gene_X.png"></a> </div>
</div>
</div>
</div>
</div>
-
<div id="vector_div">
+
<div class="text_box_in_the_box" id="vector_div">
<a href="https://2013.igem.org/Team:Uppsala/vectors">
<a href="https://2013.igem.org/Team:Uppsala/vectors">
<div id="vector_title"> <h3> Vectors </h3> </div>
<div id="vector_title"> <h3> Vectors </h3> </div>
-
<div class="vector_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/5/5c/Uppsala2013_Vector_mini.png"> </div>
+
<div class="vector_pic"> <img class="chassi_mini_pic" src="https://static.igem.org/mediawiki/2013/5/5c/Uppsala2013_Vector_mini.png"></a> </div>
</a>
</a>
-
<div id="vector_text"> Perhaps the most important chassi parts we have constructed are shuttle vectors that work both in Lactobacillus and E. coli. Because Lactobacillus is significantly harder to work with and ligations are hard to transform, constructs should first be assembled and prepped in E. coli and then transferred to Lactobacillus with the shuttle vector.  
+
<div id="vector_text"> Perhaps the most important chassi parts we have constructed are shuttle vectors that work both in Lactobacillus and E. coli. Because Lactobacillus is significantly harder to work with and ligations are hard to transform, constructs should first be assembled and prepped in E. coli and then transferred to Lactobacillus with the shuttle vector.<br><br>
-
<div id="chassi_mini_images"> <a href=" "> <img class="chassi_mini_images" src=" "></a> </div>
+
<div id="chassi_mini_images"> <a href="https://2013.igem.org/Team:Uppsala/vectors#b1"> <img class="chassi_mini_images" src="https://static.igem.org/mediawiki/2013/9/92/Shuttle-vector_pSBLbC.png"></a> </div>
</div>
</div>
</div>
</div>
-
<div id="signal_div">
+
<div class="text_box_in_the_box" id="signal_div">
<a href="https://2013.igem.org/Team:Uppsala/signal-peptide">
<a href="https://2013.igem.org/Team:Uppsala/signal-peptide">
<div id="signal_title"> <h3> Signal peptides </h3> </div>
<div id="signal_title"> <h3> Signal peptides </h3> </div>
Line 210: Line 236:
<div id="signal_text"> Lactobacillus is a great genus for the secretion of proteins and contains several secretory pathways. In order for a protein to be exported it needs to be tagged with a short amino acid sequence at the N-terminus called a signal peptide. We have synthesised a signal peptide that can be assembled with a protein of choice.  
<div id="signal_text"> Lactobacillus is a great genus for the secretion of proteins and contains several secretory pathways. In order for a protein to be exported it needs to be tagged with a short amino acid sequence at the N-terminus called a signal peptide. We have synthesised a signal peptide that can be assembled with a protein of choice.  
-
<div id="chassi_mini_images"> <a href=" "> <img class="chassi_mini_images" src=" "></a> </div>
+
<div id="chassi_mini_images"> <a href="https://2013.igem.org/Team:Uppsala/signal-peptide#b1"> <img class="chassi_mini_images" src="https://static.igem.org/mediawiki/2013/2/22/Uppsala2013_Miraculin_%28with_signal_sequence%29.png"></a> </div>
</div>
</div>
</div>
</div>
Line 216: Line 242:
</div> <!-- closing div for container_mini_pic -->
</div> <!-- closing div for container_mini_pic -->
-
<div id="chassi_text_bottom">
 
-
 
-
</div>
 
Line 224: Line 247:
</div> <!-- main_content ends -->  
</div> <!-- main_content ends -->  
-
 
+
<script type="text/javascript">
 +
preloadimages([
 +
'https://static.igem.org/mediawiki/2013/e/e2/Uppsala2013_PromoterPushed.png', 'https://static.igem.org/mediawiki/2013/0/0e/Uppsala2013_ReporterPushed.png', 'https://static.igem.org/mediawiki/2013/2/2c/Uppsala2013_ToxinPushed.png', 'https://static.igem.org/mediawiki/2013/0/0c/Uppsala2013_SignalPushed.png', 'https://static.igem.org/mediawiki/2013/9/96/Uppsala2013_VectorPushed.png']);
 +
</script>
<div id="bottom-pic">
<div id="bottom-pic">
-
<img class="bottom-pic" src="https://static.igem.org/mediawiki/2013/a/aa/Bottom_picture.png">
+
</div>
</div>

Latest revision as of 19:44, 27 October 2013


Uppsala iGEM 2013

Chassi

Lactobacillus as the new probiotic chassi for iGEM

There are many challenges for anyone who wants to do synthetic biology in a new less common organism, like getting familiar with new protocols and techniques. But another major problem is that there is a lack of fundamental parts available like plasmids, reporter genes and promoters. A big part of our project has been to develop these basic parts and make them biobrick compatible. This is done in order to open up the Lactobacillus genus as the new probiotic chassi of choice for the iGEM community. We also intend to use it ourselves for doing metabolic engineering in Lactobacillus. For this we have worked to create two shuttle vectors , a library of constitutive promoters and a couple of reporter genes that should be functional in both E. coli and Lactobacillus. E. coli is substantially easier and faster to work with. Therefore the intention is to allow construction and some characterisation to first be done in E. coli, the construct can then later be transformed to Lactobacillus.

Promoters

Different constructs need different levels of expression. We have constructed and characterised a library of constitutive promoters of different strengths. These are based on a consensus sequence from promoters in Lactococcus lactis but have also been shown to work very well in E. coli and Lactobacillus.

Reporter genes

Many techniques and methods require fluorescent reporter genes to function. While some fluorescent proteins work poorly in Lactobacillus we have biobricked a codon-optimized version of mCherry that has been shown to work. This has been done according to assembly standard 25 to allow it to be used as a fusion protein.

Toxin-antitoxin

A major challenge in synthetic biology is that there is a selective pressure against metabolically taxing systems. In nature, many natural plasmids contain genes coding for a toxin and the associated antitoxin. These systems can significantly increase the segregational stability of plasmids and is an easy to use alternative to chromosomal integration for some applications.

Vectors

Perhaps the most important chassi parts we have constructed are shuttle vectors that work both in Lactobacillus and E. coli. Because Lactobacillus is significantly harder to work with and ligations are hard to transform, constructs should first be assembled and prepped in E. coli and then transferred to Lactobacillus with the shuttle vector.

Signal peptides

Lactobacillus is a great genus for the secretion of proteins and contains several secretory pathways. In order for a protein to be exported it needs to be tagged with a short amino acid sequence at the N-terminus called a signal peptide. We have synthesised a signal peptide that can be assembled with a protein of choice.