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| {{Tokyo_Tech}} | | {{Tokyo_Tech}} |
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− | --></style> | + | /************************* This page setting ******************************/ |
| + | #stories{ |
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| + | position: relative; |
| + | height: 200px; |
| + | } |
| + | .gradation_cover{ |
| + | display: block; |
| + | position: absolute; |
| + | width: 100%; |
| + | height: 200px; |
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| + | z-index: 2; |
| + | background: linear-gradient(rgba(255,255,255,0), rgba(255,255,255,1)); |
| + | background: -webkit-gradient(linear, top, bottom, from(rgba(255,255,255,0)), to(rgba(255,255,255,1))); |
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| + | .no_cover img{ |
| + | margin: 100px auto 0; |
| + | } |
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| + | </style> |
| <script src="https://2015.igem.org/common/MathJax-2.5-latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> | | <script src="https://2015.igem.org/common/MathJax-2.5-latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> |
| <script type="text/x-mathjax-config"> | | <script type="text/x-mathjax-config"> |
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| <div id="main_contents"> | | <div id="main_contents"> |
| <div id="page_header" class="container container_top"> | | <div id="page_header" class="container container_top"> |
− | <h1 align="center">Model</h1> | + | <h1 align="center">Project</h1> |
| </div><!-- /page_header --> | | </div><!-- /page_header --> |
| <div id="contents" class="container"> | | <div id="contents" class="container"> |
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| <div id="contents_contents" class="container_contents"> | | <div id="contents_contents" class="container_contents"> |
| <div id="contents_menu"> | | <div id="contents_menu"> |
− | <h3 class="link"><a href="#overview">1. Overview</a></h3> | + | <h3 class="link"><a href="#introduction">1. Introduction</a></h3> |
− | <h3 class="link"><a href="#story_simulation">2. Story Simulation</a></h3> | + | <h3 class="link"><a href="#story">2. Our goal is to evaluate the real beauty of Snow White and the Queen</a></h3> |
− | <h3 class="link"><a href="#mathematical_model"><font size="2.7"> 2-1. Mathematical Model</font></a></h3> | + | <h3 class="link"><a href="#system">3. Introduction of system forming the basis</a></h3> |
− | <h3 class="link"><a href="#results"><font size="2.7"> 2-2. Results</font></a></h3> | + | <h3 class="link"><a href="#sys1"><span style="font-size: 14px;"> 3.1. What is TA system?</span></a></h3> |
− | <h3 class="link"><a href="#fitting">3. Fitting</a></h3> | + | <h3 class="link"><a href="#sys2"><span style="font-size: 14px;"> 3.2. The art of MazF / MazE</span></a></h3> |
− | <h3 class="link"><a href="#analysis">4. Sensitivity Analysis</a></h3> | + | <h3 class="link"><a href="#circuit">4. Our genetic circuit design</a></h3> |
− | <h3 class="link"><a href="#requirements"><font size="2.7"> 4-1. Requirements</font></a></h3> | + | <h3 class="link"><a href="#sce1"><span style="font-size: 14px;"> 4.1. Scene1 : The magic mirror's answer</span></a></h3> |
− | <h3 class="link"><a href="#prince_coli"><font size="2.7"> 4-2. the Prince <span style ="font-style : italic">coli</span> should be put in in the middle</font></a></h3> | + | <h3 class="link"><a href="#sce2"><span style="font-size: 14px;"> 4.2. Scene2 : The Queen's trap</span></a></h3> |
− | <h3 class="link"><a href="prhl"><font size="2.7"> 4-3. Prhl should be changed</font></a></h3> | + | <h3 class="link"><a href="#sce3"><span style="font-size: 14px;"> 4.3. Scene3 : Snow White's sleep </span></a></h3> |
− | <h3 class="link"><a href="production_ahl"><font size="2.7"> 4-4. Production rate of C4HSL and 3OC12HSL by RhlI and LasI</font></a></h3> | + | <h3 class="link"><a href="#sce4"><span style="font-size: 14px;"> 4.4. Scene4 : The Prince's rescue</span></a></h3> |
− | <h3 class="link"><a href="translation"><font size="2.7"> 4-5. Translation rate of protein</font></a></h3> | + | <h3 class="link"><a href="#Q.E.D.">5. Q.E.D. for the representation of Snow White</a></h3> |
− | <h3 class="link"><a href="decomposition"><font size="2.7"> 4-6. Decomposition rate of O3C12HSL by AmiE</font></a></h3> | + | <h3 class="link"><a href="#sysscene1"><span style="font-size: 14px;"> 5.1. Cold inducible promoter functions at 18°C in Scene 1</span></a></h3> |
− | <h3 class="link"><a href="degradation_amie"><font size="2.7"> 4-6. Degradation rate of AmiE</font></a></h3> | + | <h3 class="link"><a href="#sysscene2"><span style="font-size: 14px;"> 5.2. The screening of rhl promoter with optimal strength for Scene 2</span></a></h3> |
− | <h3 class="link"><a href="degradation_protein"><font size="2.7"> 4-7. Degradation rate of RFP and GFP</font></a></h3> | + | <h3 class="link"><a href="#ass"><span style="font-size: 14px;"> 5.2.1. reporter assay</span></a></h3> |
− | <h3 class="link"><a href="#software">5. Software</a></h3>
| + | <h3 class="link"><a href="#sml"><span style="font-size: 14px;"> 5.2.2. Simulation regarding Prhl strength</span></a></h3> |
− | <h3 class="link"><a href="#abstract"><font size="2.7"> 5-1. Abstract</font></a></h3> | + | <h3 class="link"><a href="#imp"><span style="font-size: 14px;"> 5.2.3. Improvement of Prhl</span></a></h3> |
− | <h3 class="link"><a href="#key_achievement"><font size="2.7"> 5-2. Key achievement</font></a></h3> | + | <h3 class="link"><a href="#sysscene3"><span style="font-size: 14px;"> 5.3. MazF-MazE system as Toxin-Antitoxin system can be controlled in Scene 3</span></a></h3> |
− | <h3 class="link"><a href="#work_flow"><font size="2.7"> 5-3. Work flow</font></a></h3> | + | <h3 class="link"><a href="#sysscene4"><span style="font-size: 14px;"> 5.4. AmiE degrades 3OC12HSl selectively and does not degrade C4HSL in Scene4</span></a></h3> |
− | <h3 class="link"><a href="#demo"><font size="2.7"> 5-4. Demonstration</font></a></h3> | + | <h3 class="link"><a href="#5-sml"><span style="font-size: 14px;"> 5.5. the simulation related to the story</span></a></h3> |
− | <h3 class="link"><a href="#download"><font size="2.7"> 5-5. Download</font></a></h3> | + | <h3 class="link"><a href="#5-str"><span style="font-size: 14px;"> 5.5.1. When the Prince comes?</span></a></h3> |
| + | <h3 class="link"><a href="#5-str2"><span style="font-size: 14px;"> 5.5.2. representation of the story</span></a></h3> |
| + | <h3 class="link"><a href="#hp">6. Integrated Human Practice</a></h3> |
| + | <h3 class="link"><a href="#cha1"><span style="font-size: 14px;"> 6.1. "Snow White"</span></a></h3> |
| + | <h3 class="link"><a href="#cha2"><span style="font-size: 14px;"> 6.2. Addition of other characters</span></a></h3> |
| + | <h3 class="link"><a href="#sof"><span style="font-size: 14px;"> 6.3. The software development for future work</span></a></h3> |
| + | <h3 class="link"><a href="#exp"><span style="font-size: 14px;"> 6.3.1. The dialogue with an expert</span></a></h3> |
| + | <h3 class="link"><a href="#ACA"><span style="font-size: 14px;"> 6.3.2. ACA Dwarfs</span></a></h3> |
| + | |
| + | <h3 class="link"><a href="#reference">7. Reference</a></h3> |
| </div><!-- /contents_menu --> | | </div><!-- /contents_menu --> |
| </div><!-- /contents_contents --> | | </div><!-- /contents_contents --> |
| </div><!-- /contents --> | | </div><!-- /contents --> |
− | <div id="overview" class="container">
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− | <div id="overview_header" class="container_header">
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− | <h2><span>1. Overview</span></h2>
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− | </div><!-- /overview_header -->
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− | <div id="overview_contents" class="container_contents">
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− | <p class="normal_text">To reproduce the story of ”Snow White”, we have designed the cell-cell communication system with improved or characterized parts and collected data from comprehensive experiments. Furthermore, we constructed the mathematical model in order to simulate the behavior of the whole system and to confirm the feasibility of our story. This simulation successfully contributed to give the suggestions to wet lab experiments and confirm the feasibility of our system. In addition, in order to utilize TA (Toxin-Antitoxin) system, we developed a new software in Java for adjusting the number of ACA sequences, which MazF dimer recognizes and cleaves in mRNAs.</p>
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− | </div><!-- /overview_contents -->
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− | </div><!-- /overview -->
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| | | |
− | <div id="story_simulation" class="container"> | + | <div id="introduction" class="container"> |
− | <div id="story_simulation_header" class="container_header"> | + | <div id="introduction_header" class="container_header"> |
− | <h2><span>2. Story Simulation</span></h2> | + | <h2><span>1. Introduction</span></h2> |
− | </div><!-- /story_simulation_header --> | + | </div><!-- /_header --> |
− | <div id="story_simulation_contents" class="container_contents"> | + | <div id="introduction_contents" class="container_contents"> |
− | <div id="mathematical_model">
| + | <p class="normal_text">When you were little, before going to sleep, you have probably asked your mother, "Mommy, read some picture books to me, please?" Your mother may have read aloud many stories. Most of the stories that have been told for generation contain lessons in them. The lessons from the Snow White story are mainly the following two points.</p> |
− | <div id="mathematical_model_header">
| + | <p class="normal_text">Ⅰ. Do not show off or envy someone.</p> |
− | <h3><span>2-1. Mathematical Model</span></h3>
| + | <p class="normal_text">Ⅱ. Do not trust unfamiliar people blindly. </p> |
− | </div><!-- /_header -->
| + | <p class="normal_text"> For a beautiful mind, we need not only to be kind and generous but also to keep a strong heart and control ourselves.In our project, the Snow White story is going to be recreated and Snow White and the Queen is going to be evaluated in terms of the beauty from both inside and outside.</p> |
− | <p class="normal_text">To simulate our gene circuits, we developed an ordinary differential equation model.</p> | + | |
− | <p style="text-align:center;">[<a href="https://2016.igem.org/Team:Tokyo_Tech/Modeling_Details">Detailed Description for Modeling</a>]</p> | + | |
− | <p class="normal_text" style="text-align:center;"><a href="javascript:void(0);" onClick="show('modeling_detail');" class="showHidden">Read More</a></p>
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− | <div id="modeling_detail" class="off">
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− | <div id="modeling_detail_wrapper">
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− | <div id="modeling_detail_expressions">
| + | |
− | <h2>Differencial Equations</h2>
| + | |
− | <h3>Snow White</h3>
| + | |
− | \begin{equation}
| + | |
− | \frac{d[mRNA_{RFP}]}{dt} = k - d[mRNA_{RFP}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{RFP}}})[mRNA_{RFP}][DiMazF]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[mRNA_{RhlI}]}{dt} = leak_{P_{lux}} + \frac{\kappa_{Lux}[C12]^{n_{Lux}}}{K_{mLux}^{n_{Lux}} + [C12]^{n_{Lux}}} - d[mRNA_{RhlI}] - F_{DiMazF}f[mRNA_{RhlI}][DiMazF]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[RFP]}{dt} = \alpha [mRNA_{RFP}] - d_{RFP}[RFP]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[RhlI]}{dt} = \alpha [mRNA_{RhlI}] - d_{RhlI}[RhlI]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[C4]}{dt} = p_{C4}[RhlI]P_{Snow White} - d_{C4}[C4]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[mRNA_{MazF}]}{dt} = leak_{P_{lux}} + \frac{\kappa_{Lux}[C12]^{n_{Lux}}}{K_{mLux}^{n_{Lux}}+ [C12]^{n_{Lux}}} \\
| + | |
− | - d[mRNA_{MazF}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{MazF}}})[mRNA_{MazF}][DiMazF]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[mRNA_{MazE}]}{dt} = k - d[mRNA_{MazE}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{MazE}}})[mRNA_{MazE}][DiMazF]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[MazF]}{dt} = \alpha [mRNA_{MazF}] - 2k_{Di_{MazF}}[MazF] + 2k_{-Di_{MazF}}[DiMazF] - d_{MazF}[MazF]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[DiMazF]}{dt} = k_{Di_{MazF}}[MazF] - k_{-Di_{MazF}}[DiMazF] - 2k_{Hexa}[DiMazE][DiMazF]^2 \\
| + | |
− | + 2k_{-Hexa}[MazHexamer] - d_{DiMazF}[DiMazF] \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[MazE]}{dt} = \alpha [mRNA_{MazE}] - 2k_{Di_{MazE}}[MazE] + 2k_{-Di_{MazE}}[DiMazE] - d_{MazE}[MazE]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[DiMazE]}{dt} = k_{Di_{MazE}}[MazE] - k_{-Di_{MazE}}[DiMazE] - k_{Hexa}[DiMazE][DiMazF]^2 \\
| + | |
− | + k_{-Hexa}[MazHexamer] - d_{DiMazE}[DiMazE]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[MazHexa]}{dt} = k_{Hexa}[DiMazE][DiMazF]^2 - k_{-Hexa}[MazHexa] - d_{Hexa}[MazHexa]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{dP_{Snow White}}{dt} = g \frac{E_{DiMazF}}{E_{DiMazF}+[DiMazF]}\left(1- \frac{P_{Snow White}+P_{Queen}+P_{Prince}}{P_{max}} \right) P_{Snow White}
| + | |
− | \end{equation}
| + | |
| | | |
− | <h3>Queen</h3>
| |
− | \begin{equation}
| |
− | \frac{d[mRNA_{GFP}]}{dt} = k - d[mRNA_{GFP}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{GFP}}})[mRNA_{GFP}][DiMazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[mRNA_{LasI}]}{dt} = leak_{P_{rhl}} + \frac{\kappa_{Rhl}[C4]^{n_{Rhl}}}{K_{mRhl}^{n_{Rhl}} + [C4]^{n_{Rhl}}} \\
| |
− | - d[mRNA_{LasI}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{LasI}}})[mRNA_{LasI}][DiMazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[GFP]}{dt} = \alpha [mRNA_{GFP}] - d_{GFP}[GFP]
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− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[LasI]}{dt} = \alpha [mRNA_{LasI}] - d_{LasI}[LasI]
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− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[C12]}{dt} = p_{C12}[LasI]P_{Queen} - d_{C12}[C12] - D[C12][AmiE]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[mRNA_{MazF}]}{dt} = leak_{P_{lux}} + \frac{\kappa_{Rhl}[C4]^{n_{Rhl}}}{K_{mRhl}^{n_{Rhl}} + [C4]^{n_{Rhl}}} \\
| |
− | - d[mRNA_{MazF}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{MazF}}})[mRNA_{MazF}][DiMazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[mRNA_{MazE}]}{dt} = k - d[mRNA_{MazE}] - F_{DiMazF}(1-(1-f)^{f_{mRNA_{MazE}}})[mRNA_{MazE}][DiMazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[MazF]}{dt} = \alpha [mRNA_{MazF}] - 2k_{Di_{MazF}}[MazF] + 2k_{-Di_{MazF}}[DiMazF] - d_{MazF}[MazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[DiMazF]}{dt} = k_{Di_{MazF}}[MazF] - k_{-Di_{MazF}}[DiMazF] - 2k_{Hexa}[DiMazE][DiMazF]^2 \\
| |
− | + 2k_{-Hexa}[MazHexamer] - d_{DiMazF}[DiMazF]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[MazE]}{dt} = \alpha [mRNA_{MazE}] - 2k_{Di_{MazE}}[MazE] + 2k_{-Di_{MazE}}[DiMazE] - d_{MazE}[MazE]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[DiMazE]}{dt} = k_{Di_{MazE}}[MazE] - k_{-Di_{MazE}}[DiMazE] - k_{Hexa}[DiMazE][DiMazF]^2 \\
| |
− | + k_{-Hexa}[MazHexamer] - d_{DiMazE}[DiMazE]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{d[MazHexa]}{dt} = k_{Hexa}[DiMazE][DiMazF]^2 - k_{-Hexa}[MazHexa] - d_{Hexa}[MazHexa]
| |
− | \end{equation}
| |
− | \begin{equation}
| |
− | \frac{dP_{Queen}}{dt} = g \frac{E_{DiMazF}}{E_{DiMazF}+[DiMazF]}\left(1- \frac{P_{Snow White}+P_{Queen}+P_{Prince}}{P_{max}}\right) P_{Queen}\\
| |
− | \end{equation}
| |
| | | |
− | <h3>Prince</h3>
| + | </p> |
− | \begin{equation}
| + | |
− | \frac{d[mRNA_{AmiE}]}{dt} = leak_{P_{lux}} + \frac{\kappa_{Lux}[C12]^n}{K_{mLux}^n + [C12]^n} - d[mRNA_{AmiE}]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{d[AmiE]}{dt} = \alpha [mRNA_{AmiE}]P_{Prince} - d_{AmiE}[AmiE]
| + | |
− | \end{equation}
| + | |
− | \begin{equation}
| + | |
− | \frac{dP_{Prince}}{dt} = g\left(1- \frac{P_{Snow White}+P_{Queen}+P_{Prince}}{P_{max}}\right) P_{Prince}
| + | |
− | \end{equation}
| + | |
− | </div><!-- /modeling_detail_expressions -->
| + | |
− | <div id="modeling_detail_parameter">
| + | |
− | <h2>Explanation about Parameters</h2>
| + | |
− | <table border="1" style="margin: auto;">
| + | |
− | <tbody>
| + | |
− | <tr><td>Parameter </td><td> Description </td></tr>
| + | |
− | <tr><td>$$g$$ </td><td> Growth rate of each cells</td></tr>
| + | |
− | <tr><td>$$P_{max}$$ </td><td> Carrying capacity </td></tr>
| + | |
− | <tr><td>$$E_{DiMazF}$$ </td><td> Effect of MazF dimer on growth rate</td></tr>
| + | |
− | <tr><td>$$k$$ </td><td> Transcription rate of mRNA under \(P_{tet}\) </td></tr>
| + | |
− | <tr><td>$$leak_{P_{lux}}$$ </td><td> Leakage of \(P_{lux}\) </td></tr>
| + | |
− | <tr><td>$$leak_{P_{rhl}}$$ </td><td> Leakage of \(P_{rhl}\) </td></tr>
| + | |
− | <tr><td>$$\kappa_{Lux}$$ </td><td> Maximum transcription rate of mRNA under \(P_{lux}\)</td></tr>
| + | |
− | <tr><td>$$\kappa_{Rhl}$$ </td><td> Maximum transcription rate of mRNA under \(P_{rhl}\) </td></tr>
| + | |
− | <tr><td>$$n_{Lux}$$ </td><td> Hill coefficient for \(P_{lux}\)</td></tr>
| + | |
− | <tr><td>$$n_{Rhl}$$ </td><td> Hill coefficient for \(P_{rhl}\)</td></tr>
| + | |
− | <tr><td>$$K_{mLux}$$ </td><td> Lumped paremeter for the Lux System</td></tr>
| + | |
− | <tr><td>$$K_{mRhl}$$ </td><td> Lumped paremeter for the Rhl System</td></tr>
| + | |
− | <tr><td>$$F_{DiMazF}$$ </td><td> Cutting rate at ACA sequences on mRNA by MazF dimer</td></tr>
| + | |
− | <tr><td>$$f$$ </td><td> The probability of distinction of ACA sequencess in each mRNA</td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{RFP}}$$ </td><td> The number of ACA sequences in \(mRNA_{RFP}\)</td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{GFP}}$$ </td><td> The number of ACA sequences in \(mRNA_{GFP}\)</td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{RhlI}}$$ </td><td> The number of ACA sequences in \(mRNA_{RhlI}\) </td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{LasI}}$$ </td><td> The number of ACA sequences in \(mRNA_{LasI}\)</td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{MazF}}$$ </td><td> The number of ACA sequences in \(mRNA_{MazF}\) </td></tr>
| + | |
− | <tr><td>$$f_{mRNA_{MazE}}$$ </td><td> The number of ACA sequences in \(mRNA_{MazE}\) </td></tr>
| + | |
− | <tr><td>$$\alpha$$ </td><td> Translation rate of Protein </td></tr>
| + | |
− | <tr><td>$$k_{Di_{MazF}}$$ </td><td> Formation rate of MazF dimer </td></tr>
| + | |
| | | |
− | <tr><td>$$k_{-Di_{MazF}}$$ </td><td> Dissociation rate of MazF dimer </td></tr> | + | </div><!-- /introduction_contents --> |
− | <tr><td>$$k_{Di_{MazE}}$$ </td><td> Formation rate of MazE dimer </td></tr>
| + | </div><!-- /introduction --> |
− | <tr><td>$$k_{-Di_{MazE}}$$ </td><td> Dissociation rate of MazE dimer </td></tr>
| + | |
− | <tr><td>$$k_{Hexa}$$ </td><td> Formation rate of Maz hexamer </td></tr>
| + | |
− | <tr><td>$$k_{-Hexa}$$ </td><td> Dissociation rate of Maz hexamer</td></tr>
| + | |
− | <tr><td>$$p_{C4}$$ </td><td> Production rate of C4HSL by RhlI</td></tr>
| + | |
− | <tr><td>$$p_{C12}$$ </td><td> Production rate of 3OC12HSL by LuxI </td></tr>
| + | |
− | <tr><td>$$D$$ </td><td> Decomposition rate of 3OC12HSL by AmiE </td></tr>
| + | |
− | <tr><td>$$d$$ </td><td> Degradation rate of mRNA </td></tr>
| + | |
− | <tr><td>$$d_{RFP}$$ </td><td> Degradation rate of RFP</td></tr>
| + | |
− | <tr><td>$$d_{GFP}$$ </td><td> Degradation rate of GFP </td></tr>
| + | |
− | <tr><td>$$d_{RhlI}$$ </td><td> Degradation rate of RhlI</td></tr>
| + | |
− | <tr><td>$$d_{LasI}$$ </td><td> Degradation rate of LasI</td></tr>
| + | |
− | <tr><td>$$d_{MazF}$$ </td><td> Degradation rate of MazF</td></tr>
| + | |
− | <tr><td>$$d_{DiMazF}$$ </td><td> Degradation rate of MazF dimer</td></tr>
| + | |
− | <tr><td>$$d_{MazE}$$ </td><td> Degradation rate of MazE </td></tr>
| + | |
− | <tr><td>$$d_{DiMazE}$$ </td><td> Degradation rate of MazE dimer </td></tr>
| + | |
− | <tr><td>$$d_{Hexa}$$ </td><td> Degradation rate of Maz Hexamer </td></tr>
| + | |
− | <tr><td>$$d_{C4}$$ </td><td> Degradation rate of C4HSL </td></tr>
| + | |
− | <tr><td>$$d_{C12}$$ </td><td> Degradation rate of 3OC12HSL </td></tr>
| + | |
− | <tr><td>$$d_{AmiE}$$ </td><td> Degradation rate of AmiE </td></tr>
| + | |
| | | |
− | </tbody>
| + | <div id="story" class="container"> |
− | </table>
| + | <div id="story_header" class="container_header"> |
− | </div><!-- /modeling_detail_parameter -->
| + | <h2><span>2. Our goal is to evaluate the real beauty of Snow White and the Queen</span></h2><br> |
− | </div><!-- /modeling_detail_wrapper -->
| + | </div><!-- /_header --> |
− | </div><!-- /modeling_detail -->
| + | <div id="story_contents" class="container_contents"> |
− | </div><!-- /story_simalation_contents -->
| + | <div id="stories"> |
− | | + | |
− | <br>
| + | |
− | <div id="results">
| + | |
− | <div id="results_header">
| + | |
− | <h3><span>2-2. Results</span></h3>
| + | |
− | </div><!-- /_header -->
| + | |
− | <p class="normal_text">As a result, we obtained and confirmed the desirable behavior of the whole system by modifying and improving parts. As described below, our simulation showed appropriate transition of fluorescence for the story.
| + | |
− | </p>
| + | |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/7/7f/T--Tokyo_Tech--2-1-1.png" height ="300"><br></div>
| + | |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 5-1.Time-dependent change of the concentrations of fluorescence proteins</span>
| + | |
− | </p></div><br>
| + | |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/7/79/T--Tokyo_Tech--4koma.png" width ="800"class="align_right" /><br></div>
| + | |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 5-2.The story of "Snow White"</span> | + | |
− | <p class="normal_text"> In the blue area of Fig, the fluorescence intensity starts to increase. Snow White coli’s fluorescence intensity exceeds that of the Queen coli’s. It represents Snow White got fairer more and more. <br>
| + | |
− | In the pink area of Fig, C12 is being synthesized thanks to the C4’s appearance. And the concentration of C12 increases. As a result, the toxin MazF augments inside of Snow White coli and the Queen coli, suppressing the increment of fluorescent proteins. It is as if the Mirror’s answer transformed the Queen into a Witch, so she can give Snow White a poisoned apple.<br>
| + | |
− | In the green area of Fig, C12 increases and the MazF inside Snow White coli induced by it increases even more. So the GFP exceeds the RFP. It looks as if Snow White bit the apple, sinking into unconsciousness promptly.<br>
| + | |
− | In the yellow area of Fig, the AmiE synthesized by the introduced Prince coli decomposes the C12 molecules so the amount of MazF inside Snow White diminishes and the amount of C4 increases. It looks as if Prince lifted Snow White and she opened her eyes.<br>
| + | |
− | </p>
| + | |
− | </div><!-- /results_contents -->
| + | |
− | </div><!-- /results --> | + | |
− | </div><!-- /story_simulation_contents --> | + | |
− | </div><!-- /story_smulation -->
| + | |
− |
| + | |
− | <div id="fitting" class="container">
| + | |
− | <div id="fitting_header" class="container_header">
| + | |
− | <h2><span>3. Fitting</span></h2> | + | |
− | </div><!-- /fitting_header -->
| + | |
− | <div id="fitting_contents" class="container_contents">
| + | |
− | <p class="normal_text">TEST</p>
| + | |
− | </div><!-- /fitting_contents -->
| + | |
− | </div><!-- /fitting -->
| + | |
| | | |
− | <div id="analysis" class="container">
| + | <div align="center"><span style="font-style : normal_text; font-size:18px;">"Magic Mirror on the wall, who is the fairest one of all?"</span></div><br><br> |
− | <div id="analysis_header" class="container_header">
| + | <p class="normal_text">Once upon a time, there lived a Queen.</p><br> |
− | <h2><span>4. Sensitivity Analysis</span></h2>
| + | <p class="normal_text">She was the fairest in the world and she herself also believed so.</p><br><br> |
− | </div><!-- /analysis_header -->
| + | <p class="normal_text">Each time the Queen asked, </p><br> |
− | <div id="analysis_contents" class="container_contents">
| + | <p class="normal_text">"Magic Mirror on the wall, who is the fairest one of all?," the mirror would give the same answer.</p><br> |
− | <p class="normal_text">We performed the sensitivity analysis descried in this section in order to examine which parameter dominates the story.</p>
| + | <p class="normal_text">"You are the fairest one of all."</p><br><br> |
− | <br> | + | <p class="normal_text">This pleased the Queen greatly, for she knew that her Magic mirror could speak nothing but the truth and she asked it the same question.</p><br><br> |
− | <div id="requirements">
| + | <p class="normal_text">"Magic Mirror on the wall, who is the fairest one of all?"</p><br><br> |
− | <div id="requirements_header">
| + | <p class="normal_text">One winter night, the Queen asked her mirror as usual.</p><br> |
− | <h3><span>4-1. Requirements</span></h3>
| + | <p class="normal_text">"Magic mirror on the wall, who is the fairest one of all?"</p><br> |
− | </div><!-- /_header -->
| + | <p class="normal_text">The mirror answered,</p><br> |
− | <div id="requirements_contents">
| + | <p class="normal_text">"Snow White is the fairest one."</p><br><br> |
− | <p class="normal_text">We defined these requirements as the “successful Snow White story.”<br>
| + | |
− | 1) At t = 150<br>
| + | |
− | concentration of RFP > concentration of GFP<br>
| + | |
− | 2) At t = 700<br>
| + | |
− | concentration of RFP< concentration of GFP<br>
| + | |
− | 3) At t = 1500<br>
| + | |
− | concentration of RFP > concentration of GFP<br>
| + | |
− | We the began to analyze the graph that satisfies these requirements that we could say that reproduces the story correctly. In the table bellow we show the range in which we modified each parameter. They were modified one step size at a time.<br></p>
| + | |
− | <table border="1" style="margin: auto;">
| + | |
− | <tbody>
| + | |
− | <tr><td>Parameter </td><td> Range </td><td> Step size </td></tr>
| + | |
− | <tr><td>$$D$$ </td><td> $$0.0001<D<0.001$$</td><td>$$0.0001$$</td></tr>
| + | |
− | <tr><td>$$p_{C4}$$ </td><td> $$0.0001<p_{C4}<1$$</td><td>$$0.001$$</td></tr>
| + | |
− | <tr><td>$$p_{C12}$$ </td><td> $$0.0001<p_{C12}<1$$</td><td>$$0.001$$</td></tr>
| + | |
− | <tr><td>$$α$$ </td><td> $$0.01<α<0.2$$</td><td>$$0.01$$</td></tr>
| + | |
− | <tr><td>$$d_{AmiE}$$ </td><td> $$0.001<d_{AmiE}<1$$</td><td>$$0.001$$</td></tr>
| + | |
− | </tbody>
| + | |
− | </table>
| + | |
− | <!--ここにレンジの表が入る-->
| + | |
− |
| + | |
− | <p class="normal_text">As a result, we obtained the following parameter ranges.</p>
| + | |
− | <table border="1" style="margin: auto;">
| + | |
− | <tbody>
| + | |
− | <tr><td>Parameter </td><td> Value </td></tr>
| + | |
− | <tr><td>$$D$$ </td><td> $$0.0056<D<0.001$$</td></tr>
| + | |
− | <tr><td>$$p_{C4}$$ </td><td> $$0.0029<p_{C4}<0.778$$</td></tr>
| + | |
− | <tr><td>$$p_{C12}$$ </td><td> $$0.001<p_{C12}<0.217$$</td></tr>
| + | |
− | <tr><td>$$α$$ </td><td> $$0.01<α<0.16$$</td></tr>
| + | |
− | <tr><td>$$d_{AmiE}$$ </td><td> $$0.001<d_{AmiE}<1$$</td></tr>
| + | |
− | </tbody>
| + | |
− | </table>
| + | |
− | <!--ここにレンジの表がもいっちょ入る-->
| + | |
− | </p>
| + | |
| | | |
− | <br>
| + | <p class="normal_text">The Snow White was Queen's daughter‐in‐law.</p> |
− | <div id="prince_coli">
| + | <p class="normal_text">She was a kind and pure girl, and just turned seven years old.</p><br> |
− | <div id="prince_coli_header"> | + | |
− | <h3><span>4-2. the Prince <span style ="font-style : italic">coli</span> should be put in in the middle</span></h3>
| + | |
− | </div><!-- /_header -->
| + | |
− | <div id="prince_coli_contents">
| + | |
− | <p class="normal_text">We run simulations in order to determine whether we would get a better behavior let we introduce the Prince coli at the beginning or halfway of the story.</p>
| + | |
− |
| + | |
− | <div align="left"><img src="https://static.igem.org/mediawiki/2016/1/1f/T--Tokyo_Tech--Population-miss.png" width ="500"class="align_left" /><br></div>
| + | |
− | <div align="left"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. ??.Number of individuals when the Prince <span style ="font-style : italic">coli</span> is introduced from the beginning</span>
| + | |
− | <div align="right"><img src="https://static.igem.org/mediawiki/2016/f/f1/T--Tokyo_Tech--AHL-miss.png" width ="500"class="align_right" /><br></div>
| + | |
− | <div align="right"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. ??.AHL concentrations when the Prince <span style ="font-style : italic">coli</span> is introduced from the beginning</span>
| + | |
− |
| + | |
− | <p class="normal_text">As a result, if we introduce the Prince coli from the beginning, the number of Prince coli increases too much (Fig) so the AmiE the Prince coli produces augments and the decomposition of C12 also overly occurs. So C12 is almost inexistent in the medium (Fig).</p>
| + | |
− |
| + | |
− | <div align="left"><img src="https://static.igem.org/mediawiki/2016/e/e7/T--Tokyo_Tech--Population.png" width ="500"class="align_left" /><br></div>
| + | |
− | <div align="left"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. ??.Number of individuals when the Prince <span style ="font-style : italic">coli</span> is introduced at t = 700</span>
| + | |
− | <div align="right"><img src="https://static.igem.org/mediawiki/2016/4/4f/T--Tokyo_Tech--AHL.png" width ="500"class="align_right" /><br></div>
| + | |
− | <div align="right"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. ??.AHL concentrations when the Prince <span style ="font-style : italic">coli</span> is introduced at t = 700</span>
| + | |
− | <p class="normal_text">On the other hand, if we introduce the Prince coli at t=700, the number of Prince coli does not increment much (Fig ), so C12 can exist until t=700 and then decreases thanks to the augment of AmiE (Fig ).<br>In conclusion, if we introduce the Prince coli at t=700, the circuit will behave accordingly.</p>
| + | |
− | </p>
| + | |
| | | |
− | <br> | + | <p class="normal_text">Then the Queen was shocked, and beside herself with rage. </p><br> |
− | <div id="prhl">
| + | <p class="normal_text">And thought,</p> |
− | <div id="prhl_header"> | + | <p class="normal_text">"If I kill Snow White, I would be the fairest one of all again."</p><br> |
− | <h3><span>4-3. Prhl should be changed</span></h3>
| + | |
− | </div><!-- /_header --> | + | <p class="normal_text">The Queen prepared a poisoned apple.</p><br> |
− | <div id="prhl_contents"> | + | |
− | <p class="normal_text">In order to confirm whether by using a combination of the current promoters we would be able to reproduce the story with our gene circuit, we performed some simulations based on the results of our assays.</p>
| + | <p class="normal_text">She decided to transform into a Witch and give the apple to Snow White.</p> |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/6/68/T--Tokyo_Tech--projct_model1.png" height ="300"><br></div>
| + | <p class="normal_text">Snow White, who always takes people at their word , bit the apple, then sank into unconsciousness soon.</p><br> |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> The intensity of Plux and Prhl promoters
| + | |
− | <p class="normal_text">The diagram above shows that the intensity of the two promoters should be in the red region of the figure.The combination of promoters we were originally going to use is shown in the graph by the green point. To move this point into the red region, we had to improve on Prhl so its expression level increases.</p>
| + | <p class="normal_text">The Dwarfs found Snow White and they grieved her "death," but they built a coffin and put her in it carefully.</p><br> |
| + | |
| + | <p class="normal_text">One day, a Price from a neighboring country passed by the Dwarfs' house.</p><br> |
| + | |
| + | <p class="normal_text">Although he knew her death, he couldn't help lifting her up because of her beauty.</p> |
| + | <p class="normal_text">Then, she opened her eyes!</p><br> |
| + | |
| + | <p class="normal_text">because this action dislodged from Snow White's throat the piece of poisoned apple that she had bitten off.</p><br><br> |
| + | |
| + | |
| + | <p class="normal_text">Awakened Snow White was adored by everyone and lived happily ever after. </p><br><br> |
| + | |
| + | |
| + | |
| + | <p class="normal_text">THE END</p><br><br> |
| + | <div class="gradation_cover"><a href="javascript:void(0);" onclick="show('stories'); return false;"><img src="https://static.igem.org/mediawiki/2016/5/54/T--Tokyo_Tech--readmore.png" /></a></div><!--- /.gradation_cover --> |
| + | </div><!-- /stories --> |
| + | <p class="normal_text">In our project, we evaluate the real beauty of Snow White and the Queen with the fluorescence intensities of RFP (Red Fluorescence Protein) and GFP (Green Fluorescence Protein). The graph shown below is used for evaluation; the vertical axis shows the beauty of Snow White and the Queen, and the horizontal axis shows the elapsed time. |
| </p> | | </p> |
| + | <p class="normal_text">The Real beauty is defined as the followings in this project.<br> |
| + | <p class="normal_text">No matter how beautiful the appearance is, no one can be a real beauty without a beautiful mind. We will show you which woman has the real beauty, Snow White or the Queen. </p> |
| | | |
| + | |
| + | <p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Real Beauty = outer beauty + inner beauty </span> |
| + | <p class="normal_text">To evaluate the Real beauty, we are going to recreate the Snow White story using <span style="font-style:italic;">E. coli</span>.</p> |
| + | </p><br> |
| + | |
| + | |
| + | |
| + | <div align="center"><a href="https://static.igem.org/mediawiki/2016/7/7f/T--Tokyo_Tech--2-1-1.png"><img src="https://static.igem.org/mediawiki/2016/7/7f/T--Tokyo_Tech--2-1-1.png" height ="500px"></a><br></div> |
| + | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 2-2-1. Time-dependent change of the concentrations of fluorescent protains</span> |
| + | </p></div><br> |
| + | |
| + | <p class="normal_text"> To evaluate the real beauty, we recreated Snow White story by using <span style="font-style:italic;">E.coli</span>.<br> |
| + | |
| + | </p> |
| + | </div><!-- /story_contents --> |
| + | </div><!-- /story --> |
| + | |
| + | <div id="system" class="container"> |
| + | <div id="system_header" class="container_header"> |
| + | <h2><span>3. Introduction of system forming the basis</span></h2> |
| + | </div><!-- /_header --> |
| + | <div id="system_contents" class="container_contents"> |
| + | <p class="normal_text"> We will first introduce the system that forms the basis of our project, the TA system. |
| + | </p> |
| + | <div id="sys1_header"> |
| + | <h3><span>3.1 What is TA system?</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sys1"> |
| + | <div id="sys1_contents"> |
| + | <p class="normal_text">A toxin-antitoxin system is composed of two or more cognate genes that encode toxins and antitoxins. Toxins are proteins, whereas antitoxins are either proteins or non-coding RNAs. Many prokaryotes harbor toxin-antitoxin systems on the genomes, typically in multiple copies. Changes in the physiological conditions, such as stress conditions or viral infection trigger antitoxin degradation by cytosolic proteases. Unleashed toxin proteins impede or alter cellular processes including translation, cell division, DNA replication, ATP synthesis, mRNA stability, or cell wall synthesis and lead to dormancy. This dormant state probably enables bacteria to survive in unfavorable conditions. In general, toxin proteins are more stable than antitoxin proteins, but antitoxins are expressed at a higher level in cells. |
| + | <br><br> |
| + | |
| + | <div align="center"><p class="normal_text">First toxin‐antitoxin: MazF / MazE</p></div> |
| + | <p class="normal_text">MazF is a toxin protein, and MazE is its cognate antitoxin protein. MazF is a ribosome-independent endoribonuclease whose activity leads to bacterial growth arrest. MazE and MazF form homodimers, and MazF dimer cleaves mRNAs at ACA sequences. One MazE dimer binds to two MazF dimers, thereby inactivating endoribonuclease activity of MazF dimer. MazE is labile andis subjected to degradation by ClpAP protease, whereas MazF is more stable. <br> |
| + | <div align="center"><a href="https://static.igem.org/mediawiki/2016/5/5d/T--Tokyo_Tech--MazMaz.jpeg"><img src="https://static.igem.org/mediawiki/2016/5/5d/T--Tokyo_Tech--MazMaz.jpeg" height ="400"></a><br></div> |
| + | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 2-3-1-1. TA system </span> |
| + | </p></div><br> |
| <br> | | <br> |
− | <div id="production_ahl">
| |
− | <div id="production_ahl_header">
| |
− | <h3><span>4-4. Production rate of C4HSL and 3OC12HSL by RhlI and LasI</span></h3>
| |
− | </div><!-- /_header -->
| |
− | <div id="production_ahl_contents">
| |
− | <p class="normal_text">The signaling molecule production rates by RhlI and LasI can be changed by modifying RhlI and LasI to make more or less signaling molecule in silico.</p>
| |
− |
| |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/9/9f/T--Tokyo_Tech--Production-AHL.png" height ="300"><br></div>
| |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Concentrations of GFP and RFP dependencies of production rate of C4 by RhlI
| |
− |
| |
− | <p class="normal_text">Each line corresponds to the transition of the concentration of RFP/GFP with a certain production rate of C12. Red and green lines correspond to RFP and GFP, respectively. Blighter one indicates higher production rate of C12.<br>
| |
− | if the production rate of C4 is between 0.029 and 0.778, our system can reproduce the story.<br>
| |
− | If this parameter is too small, The production of LasI by the Queen <span style ="font-style : italic">coli</span> is insufficiently inhibited by MazF so C12 increases greatly. As a result, The concentration of GFP overcomes the concentration of RFP and the story does not develop correctly. And if this parameter is too big, The production of LasI by the Queen <span style ="font-style : italic">coli</span> is overly inhibited by MazF so C12 does not increase. As a result, the concentration of RFP is always greater than the GFP concentration and the story does not develop either.</p>
| |
− |
| |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/0/05/T--Tokyo_Tech--Production-AHL2.png" height ="300"><br></div>
| |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Concentrations of GFP and RFP dependencies of production rate of C12 by LasI
| |
− |
| |
− | <p class="normal_text">Each line corresponds to the transition of the concentration of RFP/GFP with a certain production rate of C4. Red and green lines correspond to RFP and GFP, respectively. Blighter one indicates higher production rate of C4.<br>
| |
− | If production rate of C12 is between 0.001 and 0.217, our system can reproduce the story.</p>
| |
− | </p>
| |
| | | |
| + | </p> |
| + | |
| + | <div align="center"><p class="normal_text">Second toxin‐antitoxin: YafO / YafN</p></div> |
| + | <p class="normal_text">YafO is a toxin protein, and YafN is its cognate antitoxin protein. YafO is a ribosome-associated mRNA interferase that cleaves mRNAs’ downstream 11‐13 bases of the translation initiation sites. When 70S ribosome is dissociated, YafO associates with 50S ribosome subunit and acquires endoribonuclease activity. YafO and YafN form a complex, resulting in neutralization of YafO. YafN is labile and is subjected to degradation by the Lon protease, whereas YafO is more stable.<br><br> |
| + | |
| + | </p> |
| + | |
| + | </div> |
| + | </div> |
| + | |
| + | <div id="sys2_header"> |
| + | <h3><span>3.2 The art of MazF / MazE </span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sys2"> |
| + | <div id="sys2_contents"> |
| + | <p class="normal_text">In our project, MazF and MazE are incorporated in a single cell as a toxin and an antitoxin, respectively. Functions of these two proteins makes it possible to evaluate the beauty of Snow White with GFP and RFP fluorescence.<br> |
| + | <p class="normal_text">We will give you an example for a better understanding. Imagine that RFP is expressed little by little in <span style="font-style : italic;">E. coli</span>. |
| + | <div align="center"><a href="https://static.igem.org/mediawiki/2016/5/5d/T--Tokyo_Tech--Project_RFP.png"></div> |
| + | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 2-3-2-2 </span> |
| + | </p></div><br> |
| + | |
| + | <br><div align="center"><img src="https://static.igem.org/mediawiki/2016/5/5d/T--Tokyo_Tech--Project_RFP.png" width="200px" /></a></p></div> |
| + | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 2-3-2-3</span> |
| + | </p></div><br> |
| + | |
| + | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. 2-3-2-1 </span> |
| + | </p></div><br> |
| + | <p class="normal_text">When MazF expression is induced, the mRNA of GFP is cleaved, and thus GFP cannot be translated. Additionally, when MazE is induced, MazE and MazF forms a complex. MazF loses its function, which restarts GFP translation. |
| + | <br> |
| + | <div align="center"><a href="https://static.igem.org/mediawiki/2016/d/d8/T--Tokyo_Tech--Project_MazFE.png"><img src="https://static.igem.org/mediawiki/2016/d/d8/T--Tokyo_Tech--Project_MazFE.png" width="200px" /></a></p></div> |
| + | <p class="normal_text">In this way, we can control protein translation. That's why we decided to represent Snow White story. <div align="center"><a href="https://static.igem.org/mediawiki/2016/a/aa/T--Tokyo_Tech--Project_MazF_GFP.png"><img src="https://static.igem.org/mediawiki/2016/a/aa/T--Tokyo_Tech--Project_MazF_GFP.png" width="200px" /></a> |
| + | </p></div> |
| + | </div> |
| + | </div> |
| + | |
| + | </div><!-- /system_contents --> |
| + | </div><!-- /system --> |
| + | |
| + | <div id="circuit" class="container"> |
| + | <div id="circuit_header" class="container_header"> |
| + | <h2><span>4. Our genetic circuit design</span></h2> |
| + | </div><!-- /_header --> |
| + | <div id="circuit_contents" class="container_contents"> |
| + | <p class="normal_text">Next, we will introduce the genetic circuits that we have designed. |
| + | <p class="normal_text">Our project begins from the scene where the Magic Mirror answers the Queen's question.</p> |
| + | |
| + | <p class="normal_text">We will split the story into 4 scenes and introduce how our genetic circuits work in each scene. </p><br><br> |
| + | |
| + | </p> |
| + | |
| + | <div id="sce1_header"> |
| + | <h3><span>4.1 Scene1 : The magic mirror’s answer</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sce1"> |
| + | <div id="sce1_contents"> |
| + | <div style="float: left;"><a href="https://static.igem.org/mediawiki/2016/f/f5/T--Tokyo_Tech--koma1.png"><img src="https://static.igem.org/mediawiki/2016/f/f5/T--Tokyo_Tech--koma1.png" height ="200"></a><br></div> |
| + | |
| + | <div style="float:left; width: 400px; "><p class="normal_text" style="float: left; margin-left: 15px;"> |
| + | <span style="color:#4169e1;">"Magic mirror on the wall, who is the fairest one of all?"<br> |
| + | The mirror answered,<br> |
| + | "Snow White is the fairest one."<br></span> |
| + | |
| + | </p></div> |
| + | <p class="clear"></p> |
| + | |
| + | |
| + | <div style="text-align: center; margin-top: 10px;"><a href="https://static.igem.org/mediawiki/2016/a/a0/T--Tokyo_Tech--Project_Queen_Mirror.png"><img src="https://static.igem.org/mediawiki/2016/a/a0/T--Tokyo_Tech--Project_Queen_Mirror.png" width="450px" /></a> |
| + | <p class="caption"></p></div> |
| + | |
| + | <p class="normal_text">The story starts with the scene where it snows and gets cold. The Magic Mirror <span style="font-style: italic;">coli</span> can produce RhlI protein under low temperature condition. RhlI protein leads to the production of a signaling molecule C4HSL, which is received by the Queen <span style="font-style: italic;">coli</span> telling that Snow White is the fairest of the all.</p><br> |
| + | |
| + | </div> |
| + | </div> |
| + | |
| + | <div id="sce2_header"> |
| + | <h3><span>4.2 Scene2 : The Queen’s trap</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sce2"> |
| + | <div id="sce2_contents"> |
| + | <div style="float: left;"><a href="https://static.igem.org/mediawiki/2016/8/8e/T--Tokyo_Tech--koma2.png"><img src="https://static.igem.org/mediawiki/2016/8/8e/T--Tokyo_Tech--koma2.png" height ="200"></a><br></div> |
| + | <div style="float: left;width: 400px;"><p class="normal_text" style="float: left; margin-left: 15px;">------<br> |
| + | <font color="#4169e1">The Queen prepared a poisoned apple.<br /> |
| + | She decided to transform into a Witch and give the apple to Snow White.</font></p></div> |
| + | |
| + | <p class="clear"></p> |
| + | |
| + | <div style="text-align: center; margin-top: 10px;"><a href="https://static.igem.org/mediawiki/2016/0/0a/T--Tokyo_Tech--Project_Queen_And_Mirror.png"><img src="https://static.igem.org/mediawiki/2016/0/0a/T--Tokyo_Tech--Project_Queen_And_Mirror.png" width="400px" /></a></div> |
| <br> | | <br> |
− | <div id="translation">
| + | <p class="normal_text">The Queen, which has received C4HSL, produces LasI and MazF.</p> |
− | <div id="translation_header">
| + | <p class="normal_text">LasI produces a signaling molecule, 3OC12HSL which is the Poisoned Apple.</p> |
− | <h3><span>4-5. Translation rate of protein</span></h3>
| + | <p class="normal_text">Additionally, produced MazF inhibits the translation in the Queen. If the translation is inhibited the moment MazF is expressed, sufficient amount of LasI will not be produced, and neither will 3OC12HSL. Then the Queen will fail the assassination of Snow White.</p> |
− | </div><!-- /_header -->
| + | |
− | <div id="translation_contents">
| + | |
− | <p class="normal_text">Translation rate affects the production of protein.</p>
| + | |
− |
| + | |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/0/03/T-Tokyo_Tech--Translation.png" height ="300"><br></div>
| + | |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Concentrations of GFP and RFP dependencies of translation rate of proteins
| + | |
− |
| + | |
− | <p class="normal_text">Each line corresponds to the transition of the concentration of RFP/GFP with a certain translation rate. Red and green lines correspond to RFP and GFP, respectively. Blighter one indicates higher translation rate.<br>
| + | |
− | If translation rate of protein is between 0.01 and 0.16, our system can reproduce the story.
| + | |
− | </p> | + | |
| | | |
| + | |
| + | |
| + | |
| + | <div id="sce3_header"> |
| + | <h3><span>4.3 Scene3 : Snow White's sleep</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sce3"> |
| + | <div id="sce3_contents"> |
| + | <div style="float: left;"><img src="https://static.igem.org/mediawiki/2016/6/6f/T--Tokyo_Tech--koma3.png" height ="200"><br></div> |
| + | <div style="float: left; width: 400px;"><p class="normal_text">-----<br> |
| + | <p class="normal_text"><font color="#4169e1">Snow White, who always takes people at their word, bit the apple, then sank into unconsciousness soon.</font></p></div> |
| <br> | | <br> |
− | <div id="decomposition">
| |
− | <div id="decomposition_header">
| |
− | <h3><span>4-6. Decomposition rate of C12 by AmiE</span></h3>
| |
− | </div><!-- /_header -->
| |
− | <div id="decomposition_contents">
| |
− | <p class="normal_text">AmiE decomposes C12. The concentration of C12 after input of the Prince <span style ="font-style : italic">coli</span> is changed by AmiE. If the decomposition rate of C12 is too small, C12 does not decrease enough so the MazF inside Snow White <span style ="font-style : italic">coli</span> continues being expressed and the concentration of RFP decreases.</p>
| |
− |
| |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/0/08/T--Tokyo_Tech--Decomposition.png" height ="300"><br></div>
| |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Concentrations of GFP and RFP dependencies of decomposition rate of C12 by AmiE
| |
− |
| |
− | <p class="normal_text">Each line corresponds to the transition of the concentration of RFP/GFP with a certain value of D. Red and green lines correspond to RFP and GFP, respectively. Blighter one indicates higher value of decomposition rate of C12.<br>
| |
− | If degradation rate of C12 is higher than 0.00056, our system can reproduce the story.</p>
| |
− | </p>
| |
| | | |
| + | <p class="clear"></p> |
| + | |
| + | <div style="text-align:center; margin-top: 10px;"><a href="https://static.igem.org/mediawiki/2016/a/a5/T--Tokyo_Tech--Project_Queen_And_Snow_White.png"><img src="https://static.igem.org/mediawiki/2016/a/a5/T--Tokyo_Tech--Project_Queen_And_Snow_White.png" width="600px" /></a></div> |
| + | <p class="normal_text">The basic design of Snow White <span style="font-style: italic;">coli</span>'s genetic circuit is almost the same as the Queen <span style="font-style: italic;">coli</span>'. |
| + | Snow White <span style="font-style:italic;">coli</span> receives 3OC12HSL, the Poisoned Apple, and expresses RhlI and MazF. RhlI synthesizes signaling molecule C4HSL. As described in the previous section, the Queen <span style="font-style: italic;">coli</span> receives C4HSL and monitor Snow White<span style="font-style:italic;"> coli</span> through it. MazF, on the other hand, inhibits the translation in Snow White <span style="font-style: italic;">coli</span>. |
| <br> | | <br> |
− | <div id="degradation _amie">
| |
− | <div id="degradation_amie_header">
| |
− | <h3><span>4-7. Degradation rate of AmiE</span></h3>
| |
− | </div><!-- /_header -->
| |
− | <div id="degradation_amie_contents">
| |
− |
| |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/d/d4/T--Tokyo_Tech--DegradationAmiE.png" height ="300"><br></div>
| |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Concentration of GFP and RFP dependencies of degradation rate of AmiE
| |
− |
| |
− | <p class="normal_text">Each line corresponds to the transition of the concentration of RFP/GFP with a certain degradation rate of AmiE. Red and green lines correspond to RFP and GFP, respectively. Blighter one indicates higher degradation rate of AmiE.<br>
| |
− | Even if we modify the values of the parameters inside the defined range, the concentration of RFP overcomes the concentration of GFP. And even if the degradation rate of AmiE is small, the decomposition rate of C12 by AmiE is high enough so C12 decreases sufficiently.</p>
| |
− | </p>
| |
| | | |
| + | |
| + | </p><br> |
| + | </div> |
| + | </div> |
| + | |
| + | <div id="sce4_header"> |
| + | <h3><span>4.4. Scene4 : The Prince’s rescue</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sce4"> |
| + | <div id="sce4_contents"> |
| + | <div style="float: left;"><a href="https://static.igem.org/mediawiki/2016/4/40/T--Tokyo_Tech--koma4.png><img src="https://static.igem.org/mediawiki/2016/4/40/T--Tokyo_Tech--koma4.png" height ="300"></a><br></div> |
| + | <div style="float: left; width: 400px;"><p class="normal_text">-----<br> |
| + | <font color="#4169e1">Although he knew her death, he couldn’t help lifting her up because of her beauty.<br> |
| + | Then, she opened her eyes!<br></font></div> |
| <br> | | <br> |
− | <div id="degradation_protein">
| |
− | <div id="degradation_protein">
| |
− | <h3><span>4-8. Degradation rate of RFP and GFP</span></h3>
| |
− | </div><!-- /_header -->
| |
− | <div id="degradation_protein_contents">
| |
− | <p class="normal_text">The degradation rate of RFP and GFP is key to the success the story of ‘Snow White’.<br>
| |
− | These parameters are closely related to the concentrations of GFP and RFP, so we conjectured that if they do not take appropriate values the story can not be correctly reproduced.</p>
| |
− |
| |
− | <div align="center"><img src="https://static.igem.org/mediawiki/2016/a/a0/T--Tokyo_Tech--DegradationGFP.png" height ="300"><br></div>
| |
− | <div align="center"><p class="caption" style="font-size: 16px; text-align: center;"><span style="font-weight: bold;">Fig. </span> Relation of degradation rate of GFP and RFP
| |
− |
| |
− | <p class="normal_text">The story is reproduced only if the degradation rate of RFP and GFP are the same.</p>
| |
− | </p>
| |
− | </div><!-- /analysis_contents -->
| |
− | </div><!-- /analysis -->
| |
| <br> | | <br> |
− | <div id="software" class="container"> | + | <p class="clear"></p> |
− | <div id="software_header" class="container_header">
| + | |
− | <h2><span>5. Software</span></h2> | + | <div style="text-align: center; margin-top: 10px;"><a href="https://static.igem.org/mediawiki/2016/7/70/T--Tokyo_Tech--Project_Snow_White_Prince.png"height="100"><img src="https://static.igem.org/mediawiki/2016/7/70/T--Tokyo_Tech--Project_Snow_White_Prince.png" width="400px" /></a></div> |
− | </div><!-- /software_header --> | + | <p class="normal_text">The Prince <span style="font-style:italic;">coli</span> which receives 3OC12HSL expresses AmiE. AmiE is said to degrade HSL with more than 6 carbons, which means that AmiE degrades the Poisoned Apple, 3OC12HSL.By the degradation of the Poisoned Apple, MazF expression is inhibited in Snow White and its function is counteracted by MazE. Then, translation restarts in Snow White <span style="font-style: italic;">coli</span>.</p> |
− | <div id="software_contents" class="container_contents"> | + | </div> |
− | <br> | + | </div> |
− | <div id="abstract"> | + | </div><!-- /circuit_contents --> |
− | <div id="abstract_header"> | + | </div><!-- /circuit --> |
− | <h3><span>5-1. Abstract</span></h3>
| + | </div></div> |
− | </div><!-- /_header -->
| + | |
− | <div id="abstract_contents"> | + | <div id="Q.E.D." class="container"> |
− | <img src="https://static.igem.org/mediawiki/2016/8/8b/T--Tokyo_Tech--ACA_Dwarfs.jpg" height ="300"><br></div> | + | <div id="Q.E.D._header" class="container_header"> |
− | <p class="normal_text">We developed a new software named ACADwarfs. This software helps to control the sensitivity of the protein to MazF by regulating the number of ACA sequences in the mRNA sequence. ACADwarfs can increase or decrease the number of ACA sequences on mRNA without changing the amino acid sequences that the mRNA specifies or frameshifts resulted from insertion of bases without considering. <br>Therewith we improve the practicality of the characteristic of the <span style ="font-style : italic"> mazEF </span> system. For example you can let protein A express constantly by eliminating ACA sequences of the sequence, while letting protein B suspend to express, at the desirable timing, by expression of MazF.<br>This software also evades using rare codons, so you don’t have to worry about them.</p>
| + | <h2><span>5. Replication of “Snow White” by our genetic circuit</span></h2> |
− | <br> | + | </div><!-- /_header --> |
− | <div id="key_achievement">
| + | <div id="Q.E.D._header" class="container_contents"> |
− | <div id="key_achievement_header"> | + | <h2><span></span></h2> |
− | <h3><span>5-2. Key achievement</span></h3>
| + | <p class="normal_text">We conducted an experiment and simulated to confirm that the above four scenes can be represented. Based on them, we simulated the representation of Snow White story.</p><br> |
− | </div><!-- /_header -->
| + | <div id="sys1_header"> |
− | <p class="normal_text">
| + | <h3><span>5.1 Cold inducible promoter functions at 18°C in Scene 1</span></h3> |
− | ・Provided the tool regulating the number of ACA sequences<br>
| + | </div><!-- /_header --> |
− | ・Released under open-source license so everyone can use it<br>
| + | <div id="sysscene1"> |
− | ・Able to correspond to any base arrangements<br>
| + | <div id="sysscene1_contents"> |
− | ・Rare codons are evaded<br>
| + | |
− | ・Extend the application field of <span style ="font-style : italic">mazE</span> system<br>
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/f/f5/T--Tokyo_Tech--koma1.png" height ="200"></div><br> |
− | </p> | + | |
| + | <p class="normal_text">It is a cold-inducible promoter(cslled Pcold commonly) that plays a most important role in this Scene. Yhis story never begins unless the Magic Mirror answers the Queen's question.</p> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/0/0d/Tokyo_Tech_cold.png" height ="300"></div> |
| + | |
| + | <p class="normal_text">The experiment was conducted by BBa_1949001(cold-inducible promoter). We cultivated each sample at 18°C or 37°C and measured the [GFP / Turbidity] with a plate reader. The experimental result showed that samples cultured at 18°C had higher fluorescence intensity of GFP than those cultured at 37°C.</p> |
| + | <p class="normal_text"> Thus, it has been confirmed that the story could be begun with lowering the culture temperatures </p> |
| + | <a href="https://2016.igem.org/Team:Tokyo_Tech/Promoter_Assay/Pcold ">Read Pcold Assay page </a>. |
| + | <br><br></p> |
| + | |
| + | |
| + | <h3><span>5.2 The screening of Prhl with optimal strength for Scene 2</span><h3> |
| + | </div><!-- /_header --> |
| + | <div id="sysscene2"> |
| + | <div id="sysscene2_contents"> |
| + | |
| + | |
| + | <div align="center"><a href="https://static.igem.org/mediawiki/2016/8/8e/T--Tokyo_Tech--koma2.png"><img src="https://static.igem.org/mediawiki/2016/8/8e/T--Tokyo_Tech--koma2.png" height ="200"></a><br></div> |
| + | <p class="normal_text">Eating the Poisoned Apple given by the Queen <span style="font-style : italic">coli</span>, the Snow White <span style="font-style : italic">coli</span> falls asleep. We exploit the cell-cell communication mechanism of bacteria to represent this scene, and so we need promoters with optimal strength. Otherwise, our final genetic circuit never work properly.</p> |
| + | <p class="normal_text">Therefore, we introduce rhl system assay as a concept in this Scene. We improved the function of Prhl through the process listed below and succeeded in newly obtaining of optimal Prhl mutants for our project. </p> |
| + | <p class="normal_text"> 5.2.1 Reporter assay<br> |
| + | </div><!-- /_header --> |
| + | <div id="ass"> |
| + | <div id="ass_contents"> |
| + | <p class="normal_text">First, we evaluated the activities the existing promoters, Prhl(BBa_I14017), Plux(BBa_R0062), Plas(BBa_R0079) by observing the reactivity to three AHLs (= expression inducers, C4HSL, 3OC6HSL, and 3OC12HSL). |
| + | </p> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/0/00/T--Tokyo_Tech--assay_ahl_reporter.png" height ="200"></div> |
| + | <p class="normal_text"> However, 3OC12HSL reacted to Prhl and Plux promoters, the latter of which is not the native combination of inducer-promoter, and this phenomenon is called “crosstalk”. The graph also shows that Prhl has a large leak, and the Prhl activity is almost independent on C4HSL addition.</p> |
| + | |
| + | <a href="https://2016.igem.org/Team:Tokyo_Tech/AHL_Assay/AHL_Reporter_Assay |
| + | ">Read AHL Reporter Assay</a>. |
| + | |
| + | |
| + | <br> |
| + | </p><br> |
| + | |
| + | <p class="normal_text"> 5.2.2 Simulation regarding Prhl strength <br> |
| + | </div><!-- /_header --> |
| + | <div id="sml"> |
| + | <div id="sml_contents"> |
| + | <p class="normal_text"> Based on the experimental results in the preceding paragraph, we performed a simulation to analyze whether our genetic circuit works properly when the existing Prhl was used.<br> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/6/68/T--Tokyo_Tech--projct_model1.png" height ="300"><br></div> |
| + | |
| + | <p class="normal_text">The above diagram shows the intensity of the two promoters should be in the red region in the figure. The green point shows the relationships of the promoters which we intended to use primarily. In order to move to the red region, we found that it is needed to improve Prhl and increase its expression level.</p> |
| + | |
| + | <a href="https://2016.igem.org/Team:Tokyo_Tech/Model#prhl ">Read Model page</a>. |
| + | </p><br> |
| + | </p><br> |
| + | |
| + | <p class="normal_text"> 5.2.3 Improvement of Prhl<br> |
| + | </div><!-- /_header --> |
| + | <div id="imp"> |
| + | <div id="imp_contents"> |
| + | We generated mutants of Prhl by introducing a point mutation into the wild type (WT) Prhl. In the experiment, we added reagent AHLs into the reporter cells and examined their fluorescence intensities. As a result, we succeeded in newly obtaining stronger mutants than the WT Prhl. The new mutant was named Prhl (NM).<br> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/e/ef/Tokyo_Tech_Prhlimp.png" height ="300"><br></div> |
| + | <p class="normal_text">Actually, iGEM Tokyo_Tech has improved Prhl in the past, yielding Prhl (LR). When comparing the Prhl (NM) to Prhl (LR), the SN ratio of Prhl (NM) was higher than that of Prhl (LR), and even better, Prhl (NM) showed lower crosstalk with 3OC12HSL. When representing the Snow White story, in the presence of the crosstalk to 3OC12HSL, the Queen <span style="font-style : italic">coli</span> have to suicide by eating the Poisoned Apple made by herself. Therefore, this is the other reason why we generated the mutants using WT as a template.</p><a href="https://2016.igem.org/Team:Tokyo_Tech/AHL_Assay/Rhl_System_Assay ">Read Rhl System Assay </a>.<br> |
| + | |
| + | |
| + | </p><br> |
| + | |
| + | <h3><span>5.3 MazF-MazE system as Toxin-Antitoxin system can be controlled in Scene 3</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sysscene3"> |
| + | <div id="sysscene3_contents"> |
| + | |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/6/6f/T--Tokyo_Tech--koma3.png" height ="200"></div> |
| + | <p class="normal_text">In this Scene, we introduce TA system as a concept.</p> |
| + | <p class="normal_text">If we do not show that translation is inhibited by MazF, and translation is restarted by MazE, we cannot represent the key part of the story that "Snow White falls down by the Poisoned Apple and wake up again by the Prince.”</p> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/4/42/T--Tokyo_Tech--maz1.png" height ="300"></div> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/7/7f/T--Tokyo_Tech--maz2.png" height ="300"></div> |
| + | <p class="normal_text">In this experiment, we used the BBa_K1949100 and Bba_1949102.</p> |
| + | <p class="normal_text">First, MazF was expressed by arabinose, and 2 h later, the MazE was expressed by IPTG/p. |
| + | <p class="normal_text">From the experimental results, we found that the turbidity of samples without MazE did not rise. However, we also found that <span style="font-style : italic">E. coli</span> restarts its cell growth when MazE is expressed by adding IPTG. |
| + | Moreover, when only MazF worksed, the RFU of GFP hardly rose, but when MazE was induced, the RFU of GFP rose. (link: toxin assay)<br> |
| + | </p><p class="normal_text">From the above, we found that MazF stops cell growth and translation of <span style="font-style : italic">E. coli</span>, but MazE restarts cell growth that have stopped and furthermore restarts translation.</p> |
| + | <p class="normal_text">According to the experiments, we showed that TA system works properly.</p> <a href="https://2016.igem.org/Team:Tokyo_Tech/Toxin_Assay/mazEF_System_Assay |
| + | ">Read mazEF System Assay</a>. |
| + | |
| + | </p><br> |
| + | |
| + | |
| + | <h3><span>5.4 AmiE degrades 3OC12HSl selectively and does not degrade C4HSL in Scene 4</span></h3></span> |
| + | </div><!-- /_header --> |
| + | <div id="sysscene4"> |
| + | <div id="sysscene4_contents"> |
| + | |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/4/40/T--Tokyo_Tech--koma4.png" height ="200"></div> |
| + | <p class="normal_text">In the final Scene, we introduce the selective degradation of AHLs by AmiE as a concept. |
| + | As shown in the TA system, we found that Snow White can wake up again because MazE counteracts the function of MazF. However, we have not showed the trigger, that is, the degradation of only 3OC12HSL by the Prince <span style="font-style : italic">coli</span>. Therefore, we examined whether AmiE selectively degrades AHLs.<br> |
| + | From the experimental results, when C12 was added to the culture skution of <span style="font-style : italic">E. coli</span> where AmiE was expressed, C12 was degraded, whereas C4 was hardly degraded. |
| + | For these reasons, we showed that AmiE selectively degrades AHLs, only C12 in this project.<br></p> |
| + | <a href="https://2016.igem.org/Team:Tokyo_Tech/AmiE_Assay |
| + | ">Read AmiE Assay</a>. |
| + | |
| + | |
| + | |
| + | |
| + | </p><br> |
| + | |
| + | <h3><span>5.5 the simulation related to the story</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="5-sml"> |
| + | <div id="5-sml_contents"> |
| + | <p class="normal_text"> |
| + | |
| + | From the results of wet lab, it was showed that the designed circuit works properly at each point. We simulated the representation of the story in a combination of these Points.<br> |
| + | |
| + | </p><br> |
| + | |
| + | <p class="normal_text">5.5.1. When the Prince comes?<br> |
| + | We simulated to confirm which is better, the Prince <span style="font-style : italic">coli</span> exist from the beginning, that is, the Prince has known Snow White and watches her grow or he comes across her, in order to make our genetic circuit work. |
| + | As a result, we found that when the Prince <span style="font-style : italic">coli</span> is added from the beginning, AmiE produced by the Prince <span style="font-style : italic">coli</span> increases and C12 is overdegraded. Then, C12 cannot exist in the medium (Fig. 2), and the circuit does not work correctly.<br> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/1/1f/T--Tokyo_Tech--Population-miss.png" height ="300" ></div> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/f/f1/T--Tokyo_Tech--AHL-miss.png" height ="300" class="align_right"></div> |
| + | |
| + | <p class="normal_text">As a result, if we introduce the Prince <span style ="font-style : italic">coli</span> from the beginning, the number of Prince <span style ="font-style : italic">coli</span> increases too much (Fig.5-4-1-1) so the AmiE the Prince <span style ="font-style : italic">coli</span> produces augments and the decomposition of C12 also occurs overly. So C12 is almost inexistent in the medium (Fig.5-4-1-2).</p> |
| + | |
| + | |
| + | <p class="normal_text">On the other hand, when the Prince <span style="font-style : italic">coli</span> is added at t = 700, the number of the Prince <span style="font-style : italic">coli</span> does not increase greatly (Fig3). Therefore, C12 can exist until t = 70, and after that C12 decreases with an increase in AmiE (Fig4).<br></p> |
| + | |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/e/e7/T--Tokyo_Tech--Population.png" height ="300" class="align_left"></div> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/4/4f/T--Tokyo_Tech--AHL.png" height ="300" class="align_right"></div> |
| + | |
| + | <p class="normal_text">From this result, it was found that the genetic circuit works well by adding the Prince <span style="font-style : italic">coli</span> at t=700. In other words, as with the original story, the Prince <span style="font-style : italic">coli</span> comes across Snow White <span style="font-style : italic">coli</span> at t=700 and rescues her.<br></p><a href="https://2016.igem.org/Team:Tokyo_Tech/Model#prince_coli ">Read Model page</a>. |
| + | </div><!-- /_header --> |
| + | <div id="5-str"> |
| + | <div id="5-str_contents"> |
| + | |
| + | |
| + | </p><br> |
| + | |
| + | <p class="normal_text">5.5.2 representation of the story<br> |
| + | </div><!-- /_header --> |
| + | <div id="5-str2"> |
| + | <div id="5-str2_contents"> |
| + | As a result of simulation, we obtained and confirmed the desirable behavior of the whole system by modifying and improving parts. As described below, our simulation showed appropriate transition of fluorescence for the story.<br> |
| + | |
| + | Based on the simulation, we will show you which one is a real beauty, Snow White <span style="font-style : italic">coli</span> or the Queen <span style="font-style : italic">coli</span>.<br> |
| + | <div class="floating"><img src="https://static.igem.org/mediawiki/2016/7/79/T--Tokyo_Tech--4koma.png" width ="320"class="align_right"> </div> |
| + | <p class="normal_text"> In the blue area of Fig.5-2-2, the concentration of fluorescent proteins start to increase. The concentration of RFP of Snow White <span style ="font-style : italic">coli</span> exceeds that of GFP of the Queen <span style ="font-style : italic">coli</span>. <br> |
| + | It is as if Snow White got fairer more and more.<br><br> |
| + | |
| + | In the pink area of Fig.5-2-2, the concentration of C12 increase thanks to the appearance of C4. As a result, the MazF inside Snow White <span style ="font-style : italic">coli</span> and the Queen <span style ="font-style : italic">coli</span> start to suppress the increment of fluorescet proteins. <br> |
| + | It is as if the Queen, influenced by the Mirror's answer, transforming into a Witch in order to give Snow White a poisoned apple.<br><br> |
| + | |
| + | In the green area of Fig.5-2-2, the concentration of C12 more increases and the MazF inside Snow White <span style ="font-style : italic">coli</span> more suppress the increment of GFP. So the concentration GFP exceeds that of RFP. <br> |
| + | It looks as if Snow White bit the apple, sinking into unconsciousness soon.<br><br> |
| + | |
| + | In the yellow area of Fig.5-2-2, the AmiE synthesized by the introduced Prince <span style ="font-style : italic">coli</span> decomposes C12 so the MazF inside Snow White <span style ="font-style : italic">coli</span> diminishes and the concentration of GFP resumes. <br> |
| + | It looks as if the Prince lifted Snow White and she opened her eyes. |
| + | |
| + | |
| + | </p> |
| + | |
| + | </div><!-- /Q.E.D._contents --> |
| + | </div><!-- /Q.E.D. --> |
| + | </div></div> |
| + | <!-- Additional --></div> |
| + | |
| + | <div id="hp" class="container"> |
| + | <div id="hp_header" class="container_header"> |
| + | <h2><span>6.Integrated Human Practice</span></h2> |
| + | </div><!-- /_header --> |
| + | <div id="hp_contents" class="container_contents"> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/2/2a/Tokyo_Tech_HP.png" height ="300"><br></div> |
| + | <p class="normal_text"> In promoting our project, we had dialogues with the public and experts. Based on the opinions from them, we developed our project. This led to success in creation of a well-rounded project with the connection between the public and experts, keeping from our narrow view. |
| | | |
| <br> | | <br> |
− | <div id="work_flow">
| + | |
− | <div id="work_flow_header">
| + | </p><br><br> |
− | <h3><span>5-3. Work flow</span></h3>
| + | <div id="cha1_header"> |
− | </div><!-- /_header -->
| + | <h3><span>6.1 “Snow White”</span></h3> |
− | <p class="normal_text">TEST
| + | |
− | </p>
| + | |
− | <br> | + | |
− | <div id="demo">
| + | |
− | <div id="demo_header">
| + | |
− | <h3><span>5-4. Demonstration</span></h3>
| + | |
− | </div><!-- /_header -->
| + | |
− | <p class="normal_text">TEST
| + | |
− | </p>
| + | |
− | <br> | + | |
− | <div id="download">
| + | |
− | <div id="download_header"> | + | |
− | <h3><span>5-5. Download</span></h3> | + | |
| </div><!-- /_header --> | | </div><!-- /_header --> |
− | <p class="normal_text">To download click <a href="https://static.igem.org/mediawiki/2016/3/32/T--Tokyo_Tech--ACA_Dwarfs.zip">here</a>.</p> | + | <div id="cha1"> |
− | <p class="normal_text">The code is available on <a href="https://github.com/Ryuta339/ACADwarfs">github</a>.</p> | + | <div id="cha1_contents"> |
− | </div><!-- /software_contents -->
| + | <p class="normal_text">Why we are going to participate in the iGEM with the theme of Snow White? It is resulted from drawing on the opinion obtained through various dialogues with the public. This time, we decided to deal with Snow White, which was easy-to-follow, familiar, and attracted the public.<br> |
− | </div><!-- /software -->
| + | <h3><span>6.2 Addition of other characters</span></h3> |
− | </div><!-- /main_contents -->
| + | </div><!-- /_header --> |
− | <script type="text/javascript"> | + | <div id="cha21"> |
| + | <div id="cha2_contents"> |
| + | <p class="normal_text">Initially, only 3 characters, Snow White, the Queen, and the Prince, appeared in our story. However, we got the simple question from junior high school and high school students that why other characters did not appear in our story. Then we decided to add other characters. We designed the Magic Mirror’s genetic circuit and conducted an experiment. Additionally, as dwarfs, we prepared the <span style="font-style : italic">E. coli</span> (strain name). As you can see in the photograph, they have round shapes and are very charming compared to the general <span style="font-style : italic">E. coli</span>. <br><br></div></div><!-- /cha21 --> |
| + | |
| + | <div id="sof_header"> |
| + | <h3><span>6.3. The software development for future work</span></h3> |
| + | </div><!-- /_header --> |
| + | <div id="sof"> |
| + | <div id="sof_contents"> |
| + | <p class="normal_text">One students asked the question, "Can you apply this project to contribute society?" After we thought what we could do, we decided to have a dialogue with an expert.<br><br> |
| + | </p> |
| + | <div id="dia_header"> |
| + | <h4><span>6.3.1 The dialogue with an expert</span></h4> |
| + | </div><!-- /_header --> |
| + | <div id="dia"> |
| + | <div id="dia_contents"> |
| + | <p class="normal_text">We developed a new software named ACA Dwarfs. This software helps to control the sensitivity of the protein to MazF by regulating the number of ACA sequences in the mRNA sequence. ACA Dwarfs can increase or decrease the number of ACA sequences on mRNA without changing amino acid sequences that the mRNA specifies or frameshift resulted from insertion of bases without considering.</p> |
| + | <br><br> |
| + | </p></div> |
| + | |
| + | <div id="dwa_header"> |
| + | <h4><span>6.3.2 ACA Dwarfs</span></h4> |
| + | </div><!-- /_header --> |
| + | <div id="dwa"> |
| + | <div id="dwa_contents"> |
| + | <div align="center"><img src="https://static.igem.org/mediawiki/2016/8/8b/T--Tokyo_Tech--ACA_Dwarfs.jpg" height ="300"><br></div> |
| + | <p class="normal_text">After having dialogue with experts, we obtained a comment that TA system has a potential to be linked to development of effective technology. |
| + | However, at present, there exits problems when using a TA system to control the protein production.<br> |
| + | <p class="normal_text">We cannot selectively produce only desired protein because other proteins would be also produced at the same time. |
| + | Then, our dry lab used Java to develop software named “ACA Dwarfs” adjusting number of ACA base sequence as a solution to the problem.</p> |
| + | <br> |
| + | |
| + | |
| + | </p></div> |
| + | </div> |
| + | </div> |
| + | |
| + | </div><!-- /sof_contents --> |
| + | </div><!-- /sof --> |
| + | </div><!-- additional --> |
| + | </div><!-- additional --> |
| + | </div><!-- additional --> |
| + | |
| + | |
| + | <div id="reference" class="container"> |
| + | <div id="reference_header" class="container_header"> |
| + | <h2><span>7. Reference</span></h2> |
| + | </div><!-- /_header --> |
| + | <div id="reference_contents" class="container_contents"> |
| + | <p class="normal_text">[1] Unterholzner SJ, Poppenberger B, Rozhon W. Toxin-antitoxin systems: Biology, identification, and ampicillin. Mob Genet Elements. 2013 Sep; 3(5): e26219.</p> |
| + | <p class="normal_text">[2]Zielenkiewicz U., Ceglowski P. The toxin-antitoxin system of the streptococcal plasmid pSM19035.J. Bacteriol. 2005;187:6094–6105.</p> |
| + | <p class="normal_text">[3] Fozo EM, Makarova KS, Shabalina SA, Yutin N, Koonin EV, Storz G. Abundance of type I toxin–antitoxin systems in bacteria: searches for new candidates and discovery of novel families. Nucleic Acids Res. 2010 Jun; 38(11): 3743–59.</p> |
| + | <p class="normal_text">[4] Gerdes K, Wagner EG. RNA antitoxins. Curr. Opin. Microbiol. 2007 Apr; 10 (2): 117–24. </p> |
| + | <p class="normal_text">[5] Zhang J., Y Zhang, L Zhu, Suzuki M, Inouye M. Interference of mRNA function by sequence-specific endoribonuclease PemK. J. Biol. Chem. 2004 Mar; 279:20678-20684.</p> |
| + | <p class="normal_text">[6] Park J.-H., Yamaguchi Y., Inouye M. Intramolecular regulation of the sequence-specific mRNA interferase activity of MazF fused to a MazE fragment with a linker cleavable by specific proteases. Appl. Environ. Microbiol. 2012 Jun; 78(11): 3794–3799.</p> |
| + | <p class="normal_text">[7] Aizenman E., H Engelberg-Kulka, G Glaser. An Escherichia coli chromosomal “addiction module” regulated by guanosine 3′,5′-bispyrophosphate: a model for programmed bacterial cell death. Proc Natl Acad Sci U S A. 1996 Jun; 93(12): 6059–6063. </p> |
| + | <p class="normal_text">[8] Brown J. M., and Shaw K. J. A Novel Family of Escherichia coli Toxin-Antitoxin Gene Pairs. J Bacteriol. 2003 Nov; 185(22): 6600–6608.</p> |
| + | <p class="normal_text">[9] Zhang Y, Yamaguchi Y, Inouye M. Characterization of YafO, an Escherichia coli toxin. J Biol Chem. 2009 Sep; 284(38): 25522–25531.</p> |
| + | <p class="normal_text">[10]Christensen-Dalsgaard M., Jorgensen M.G., Gerdes K. Three new RelE-homologous mRNA interferases of Escherichia coli differentially induced by environmental stresses. Mol. Microbiol. 2010 Jan; 75:333–348. </p> |
| + | <p class="normal_text">[11]Ochiai S, Yasumoto S, Morohoshi T, Ikeda T. AmiE, a Novel N-Acylhomoserine Lactone Acylase Belonging to the Amidase Family, from the Activated-Sludge Isolate Acinetobacter sp. Strain Ooi24. Appl Environ Microbiol.2014 Nov;80(22):6919-25.</p> |
| + | <p class="normal_text"> |
| + | [12] Gerardo Medina et al. Mechanism of Pseudomonas aeruginosa RhlR Transcriptional Regulation of the rhlAB Promoter. J Bacteriol. 2003 Oct; 185(20): 5976–5983.</p> |
| + | </div><!-- /reference_contents --> |
| + | </div><!-- /reference --> |
| + | </div> |
| + | </div> |
| + | </div> |
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