Team:WashU StLouis/Project

From 2014.igem.org

(Difference between revisions)
 
(15 intermediate revisions not shown)
Line 1: Line 1:
-
{{CSS/Main}}
+
{{:Team:WashU_StLouis/CSS}}
{{WashU/Layout}}
{{WashU/Layout}}
Line 11: Line 11:
<!-- content -->
<!-- content -->
-
<table id="firstblock" width="100%" cellspacing="0" height="500px">
+
<table
 +
style="width: 80%; height: 500px; text-align: left; margin-left: auto; margin-right: auto;"
 +
id="block" cellspacing="0">
 +
<tbody>
<tr>
<tr>
-
<td bgColor="#FFFFFF"></td>
+
<td
-
<td width="975px" align="center" bgColor="#FFFFFF" >
+
style="width: 100%; text-align: left; background-color:#FFF;"><!-- You can replace this image with your team's logo! -->
-
 
+
<center><img
-
<!-- You can replace this image with your team's logo! -->
+
src="https://static.igem.org/mediawiki/2014/0/03/WashU_iGem_logo.jpg"
-
<img src="https://static.igem.org/mediawiki/2014/0/03/WashU_iGem_logo.jpg" width="500px">
+
width="350"></center>
-
 
+
<!--Project content -->
-
 
+
<center>
-
 
+
<h1> Project Overview </h1>
-
<!--Project content -->
+
</center>
-
<h1> Project Description </h1>
+
<center>
-
<p> Our project is currently the first step in a much larger endeavor. </p>
+
<p> Our project is currently the first step in a much larger
-
<img src="https://static.igem.org/mediawiki/2014/5/57/WUSTL_IGEM_Big_Picture.tiff" width="500px">
+
endeavor.</p>
-
<p> We are attempting to take the <i> nif </i> cluster from <i> Cyanothece </i> sp. ATCC 51442 and get it to function in <i> E. coli </i> while simultaneously attempting to create a transcriptional regulation system that turns off in the light and turns on in the dark. In doing such, we hope to create a system for nitrogen fixation that operates exclusively in the absence of light in preparation for transformation into a photosynthetic system.  
+
</center>
-
<h1> Content</h1>
+
<table
-
 
+
style="text-align: left; width: 100%; margin-left: auto; margin-right: auto;"
-
 
+
border="0" cellpadding="5" cellspacing="5">
-
 
+
<tbody>
-
 
+
<tr>
-
 
+
<td style="vertical-align: top; width: 50%;"><img
-
<h1>References </h1>
+
style="width: 100%;" alt="E. coli to Synechocystis to Chloroplast"
-
<p>
+
src="https://static.igem.org/mediawiki/2014/1/1f/Washu_2014_project_overview1.jpg"
-
iGEM teams are encouraged to record references you use during the course of your research. They should be posted somewhere on your wiki so that judges and other visitors can see how you though about your project and what works inspired you. </p>  
+
align="left"></td>
-
 
+
<td
-
 
+
style="vertical-align: middle; text-align: justify; width: 50%;">We
-
 
+
are attempting to take the <i> nif </i> cluster from a
-
 
+
cyanobacteria and get it to function in <i> E. coli </i> while
-
<p> You can use these subtopics to further explain your project</p>
+
simultaneously attempting to create a transcriptional regulation system
-
 
+
that turns off in the light and turns on in the dark. <br>
-
<ol>
+
<br>
-
<li>Overall project summary</li>
+
In doing such, we
-
<li>Project Details</li>
+
hope to create a system for nitrogen fixation that operates exclusively
-
<li>Materials and Methods</li>
+
in the absence of light in preparation for transformation into a
-
<li>The Experiments</li>
+
photosynthetic system. After we come to a greater understanding of how
-
<li>Results</li>
+
the system works and perfect it, we can move on to working in a more
-
<li>Data analysis</li>
+
complex organism, such as a cyanobacteria like <i> Synecosystis </i>spp.
-
<li>Conclusions</li>
+
6803. <br>
-
</ol>
+
<br>
-
 
+
The end goal is to create plants that can fix their own nitrogen
-
<p>
+
by moving from the cyanobacteria into the chloroplast of the plant.
-
It's important for teams to describe all the creativity that goes into an iGEM project, along with all the great ideas your team will come up with over the course of your work.
+
Endosymbiotic theory postulates that cyanobacteria are the ancestors to
-
</p>
+
chloroplasts, so this is the natural progression.</td>
-
 
+
</tr>
-
<p>
+
<tr>
-
It's also important to clearly describe your achievements so that judges will know what you tried to do and where you succeeded. Please write your project page such that what you achieved is easy to distinguish from what you attempted.  
+
<td
-
</p>
+
style="vertical-align: middle; width: 50%; text-align: justify;">
-
 
+
<p>This summer, we were successful in transforming <span
-
<a href=https://2014.igem.org/Team:WashU_StLouis/Project/nif> Nif Cluster </a> |
+
style="font-style: italic;">E. coli</span> with the <span
-
<a href=https://2014.igem.org/Team:WashU_StLouis/Project/light> Light Regulation </a> |
+
style="font-style: italic;">nif</span> cluster from <span
-
<a href=https://2014.igem.org/Team:WashU_StLouis/Project/collaboration> Collaboration </a> |
+
style="font-style: italic;">Cyanothece </span>51142, and ran an
-
<a href=https://2014.igem.org/Team:WashU_StLouis/Project/HumanPractice> Human Practices </a>  
+
Acetylene Reduction Assay in order to test for the strains ability to
-
 
+
fix nitrogen. For more information, please consult our<a
-
 
+
href="https://2014.igem.org/Team:WashU_StLouis/Project/nif">
-
 
+
Nitrogenase </a> page.</p>
 +
This summer, we were also successful in cloning a light regulated
 +
repressor system in order to turn OFF transcription of genes in the
 +
presence of light. For more information on our methods and background,
 +
please visit the <a
 +
href="https://2014.igem.org/Team:WashU_StLouis/Project/light">Light
 +
Regulation </a> page. <br>
 +
<br>
 +
Be sure to check out our <a
 +
href="https://2014.igem.org/Team:WashU_StLouis/Project/collaboration">
 +
Collaboration </a> and <a
 +
href="https://2014.igem.org/Team:WashU_StLouis/Parts"> Parts </a> pages as well!</td>
 +
<td
 +
style="vertical-align: middle; width: 50%; text-align: justify;"><img
 +
style="width: 100%;" alt="WashU project"
 +
src="https://static.igem.org/mediawiki/2014/4/4e/WashU_Project_Overview.png"></td>
 +
</tr>
 +
</tbody>
 +
</table>
 +
&nbsp;
 +
<p> </p>
 +
<table
 +
style="text-align: left; width: 494px; height: 116px; margin-left: auto; margin-right: auto;"
 +
border="1" cellpadding="2" cellspacing="0">
 +
<tbody>
 +
<tr>
 +
<td style="vertical-align: top; text-align: center;">Organism<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">Ease
 +
of Engineering<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">Photosynthetic<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">Crop
 +
Plant<br>
</td>
</td>
-
<td bgColor="#FFFFFF"></td>
 
</tr>
</tr>
 +
<tr>
 +
<td style="vertical-align: top; text-align: center;"><span
 +
style="font-style: italic;">E. coli</span><br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✓✓<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✕<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✕<br>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td style="vertical-align: top; text-align: center;">S. 6803<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✓</td>
 +
<td style="vertical-align: top; text-align: center;">✓</td>
 +
<td style="vertical-align: top; text-align: center;">✕<br>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td style="vertical-align: top; text-align: center;">Chloroplast<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✕<br>
 +
</td>
 +
<td style="vertical-align: top; text-align: center;">✓</td>
 +
<td style="vertical-align: top; text-align: center;">✓</td>
 +
</tr>
 +
</tbody>
</table>
</table>
-
<!-- end of first block -->
+
<br>
-
 
+
Our teams project goals were to:<br>
-
 
+
•&nbsp;&nbsp;&nbsp; Determine the optimal conditions for culturing<span
 +
style="font-style: italic;"> E. coli</span> strains containing the <span
 +
style="font-style: italic;">Cyanothece</span> sp. 51142 nif cluster<br>
 +
•&nbsp;&nbsp;&nbsp; Select the best strains for further testing<br>
 +
•&nbsp;&nbsp;&nbsp; Create a light repressed gene regulatory mechanism<br>
 +
•&nbsp;&nbsp;&nbsp; Compare fold change of light induction with new
 +
hybrid promoter<br>
 +
<table
 +
style="text-align: left; width: 100%; margin-left: auto; margin-right: auto;"
 +
border="0" cellpadding="5" cellspacing="5">
 +
<tbody>
 +
<tr>
 +
<td
 +
style="vertical-align: middle; width: 50%; text-align: center;"><img
 +
style="width: 100%;" alt="Engineered strains"
 +
src="https://static.igem.org/mediawiki/2014/7/7c/WashU_Engineered_Strains.jpg"
 +
align="left" hspace="5"><span style="font-weight: bold;"> </span>
 +
<center>
 +
<center>
 +
<div style="text-align: left;">Figure above: Engineered
 +
strains of <span style="font-style: italic;">E. coli</span> being
 +
flushed with argon gas to create anaerobic conditions<br>
 +
</div>
 +
</center>
 +
</center>
 +
</td>
 +
<td
 +
style="vertical-align: middle; width: 50%; text-align: justify;">Through
 +
our experiments, we concluded that:<br>
 +
•&nbsp;&nbsp;&nbsp; Of the five E. coli strains tested, JM109 and
 +
WM1788 showed strongest nitrogenase activity. <br>
 +
•&nbsp;&nbsp;&nbsp; The linear relationship between nitrogen fixation
 +
activity and time matches that seen in nature. <br>
 +
•&nbsp;&nbsp;&nbsp; Optimal conditions: glucose as carbon-source,
 +
glutamate as nitrogen-source, LB as inoculating media, minimal M9 as
 +
testing media for GC assay, anaerobic environment at&nbsp;&nbsp; 30 °C
 +
for overnight preparation before acetylene reduction assay. <br>
 +
•&nbsp;&nbsp;&nbsp; Troubleshoot a faulty reporter mechanism<br>
 +
•&nbsp;&nbsp;&nbsp; Created a hybrid promoter<br>
 +
•&nbsp;&nbsp;&nbsp; Ran light experiments that showed discernable fold
 +
change in on and off states with appropriate amounts of aTc.<br>
 +
<br>
 +
In future, we intend to:<br>
 +
•&nbsp;&nbsp;&nbsp; Alter conditions to increase activity in JM109 and
 +
WM1788 <br>
 +
•&nbsp;&nbsp;&nbsp; Determine a minimal nif cluster<br>
 +
•&nbsp;&nbsp;&nbsp; Directly check and optimize light sensitive
 +
promoters<br>
 +
•&nbsp;&nbsp;&nbsp; Adjust the leakiness of the light sensor system to
 +
not need aTc<br>
 +
•&nbsp;&nbsp;&nbsp; Swap out the reporter protein with the nif cluster
 +
to get both systems working in conjunction.<br>
 +
•&nbsp;&nbsp;&nbsp; Transition into cyanobacteria by transferring the
 +
genes with the nif cluster back into Synechocystis S. 6803.</td>
 +
</tr>
 +
</tbody>
 +
</table>
 +
<center>
 +
<center>
 +
<h1>References </h1>
 +
</center>
 +
<p style="text-align: left;">The pictures used above were taken
 +
from the following sources: </p>
 +
<div style="text-align: left;"> </div>
 +
<p style="text-align: left; margin-left: 40px;"> <a
 +
href="http://protist.i.hosei.ac.jp/PDB/images/Prokaryotes/Chroococcaceae/Synechocystis/sp_02.jpg"><i>1.
 +
Synechocystis</i> </a></p>
 +
<div style="text-align: left; margin-left: 40px;"> </div>
 +
<p style="text-align: left; margin-left: 40px;"> <a
 +
href="http://www.pitch.com/imager/explosive-diarrhea-anyone/b/original/2575052/269f/EcoliEM4.jpg"><i>2.
 +
E. coli</i> </a> </p>
 +
<div style="text-align: left; margin-left: 40px;"> </div>
 +
<div style="text-align: left; margin-left: 40px;"> <a
 +
href="http://www.motherearthnews.com/%7E/media/Images/MEN/Editorial/Articles/Magazine%20Articles/1971/05-01/How%20to%20Dry%20Sweet%20Corn/corn.jpg">3.
 +
Corn </a></div>
 +
<p> </p>
 +
</center>
 +
</td>
 +
</tr>
 +
</tbody>
</table>
</table>
</html>
</html>
 +
{{:Team:WashU_StLouis/footer}}

Latest revision as of 22:18, 17 October 2014



Project Overview

Our project is currently the first step in a much larger endeavor.

E. coli to Synechocystis to Chloroplast We are attempting to take the nif cluster from a cyanobacteria and get it to function in E. coli while simultaneously attempting to create a transcriptional regulation system that turns off in the light and turns on in the dark.

In doing such, we hope to create a system for nitrogen fixation that operates exclusively in the absence of light in preparation for transformation into a photosynthetic system. After we come to a greater understanding of how the system works and perfect it, we can move on to working in a more complex organism, such as a cyanobacteria like Synecosystis spp. 6803.

The end goal is to create plants that can fix their own nitrogen by moving from the cyanobacteria into the chloroplast of the plant. Endosymbiotic theory postulates that cyanobacteria are the ancestors to chloroplasts, so this is the natural progression.

This summer, we were successful in transforming E. coli with the nif cluster from Cyanothece 51142, and ran an Acetylene Reduction Assay in order to test for the strains ability to fix nitrogen. For more information, please consult our Nitrogenase page.

This summer, we were also successful in cloning a light regulated repressor system in order to turn OFF transcription of genes in the presence of light. For more information on our methods and background, please visit the Light Regulation page.

Be sure to check out our Collaboration and Parts pages as well!		 WashU project
 

Organism
 Ease of Engineering
 Photosynthetic
 Crop Plant
E. coli
 ✓✓
 ✕
 ✕
S. 6803
 ✓ ✓ ✕
Chloroplast
 ✕
 ✓ ✓

Our teams project goals were to:
•    Determine the optimal conditions for culturing E. coli strains containing the Cyanothece sp. 51142 nif cluster
•    Select the best strains for further testing
•    Create a light repressed gene regulatory mechanism
•    Compare fold change of light induction with new hybrid promoter
Engineered strains
Figure above: Engineered strains of E. coli being flushed with argon gas to create anaerobic conditions
 Through our experiments, we concluded that:
•    Of the five E. coli strains tested, JM109 and WM1788 showed strongest nitrogenase activity.
•    The linear relationship between nitrogen fixation activity and time matches that seen in nature.
•    Optimal conditions: glucose as carbon-source, glutamate as nitrogen-source, LB as inoculating media, minimal M9 as testing media for GC assay, anaerobic environment at   30 °C for overnight preparation before acetylene reduction assay.
•    Troubleshoot a faulty reporter mechanism
•    Created a hybrid promoter
•    Ran light experiments that showed discernable fold change in on and off states with appropriate amounts of aTc.

In future, we intend to:
•    Alter conditions to increase activity in JM109 and WM1788
•    Determine a minimal nif cluster
•    Directly check and optimize light sensitive promoters
•    Adjust the leakiness of the light sensor system to not need aTc
•    Swap out the reporter protein with the nif cluster to get both systems working in conjunction.
•    Transition into cyanobacteria by transferring the genes with the nif cluster back into Synechocystis S. 6803.

References

The pictures used above were taken from the following sources:

1. Synechocystis

2. E. coli

Special thanks to our 2014 Sponsors:

If you want to sponsor us, please contact us below!

© Washington University in St. Louis iGEM 2014 | Contact Us | Follow Us on Social Media

Retrieved from "http://2014.igem.org/Team:WashU_StLouis/Project"