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| - | <h1>Biobricks</h1> | + | <h1>Data Page</h1> |
| - | <div id="box" style="width: 700px; margin-left: 137px; padding: 5px; border: 3px solid #000; background-color: #fe2b33;">
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| - | <div id="template" style="text-align: center; font-weight: bold; font-size: large; color: #f6f6f6; padding: 5px;">
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| - | READ THESE INSTRUCTIONS.
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| - | </div>
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| - | <div id="instructions" style="text-align: center; font-weight: normal; font-size: small; color: #0595A8; padding: 5px;">
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| - | . <strong>PAS TOUCHE ! Work in progress</strong> </br>
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| - | </div>
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| - | </div>
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| | + | <h2> Our parts</h2> |
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| + | <table align="center"> |
| - | <h3>BBa_K1141001</h3> | + | <tr> |
| - | <p>KillerRed has been engineered via mutagenesis from the original AM2CP anthomedusa. The eukariotic vector of the gene was given to us by Mr.Dimitrov and Mr.Roulland from Institut Albert Bonniot, Grenoble.It is a Red Fluorescent Protein, and as most RFP it emits Reactive Oxygen Species (ROS) when illuminated. Given its configuration KillerRed tends to emit ROS in bigger quantity, a such amount of ROS being lethal for the cell. This protein fits in our project in 2 ways: First it is fluorescent which makes the transfected cells detectable and countable by the device. Second its activity is only triggered by light, this way no endogenous chemical product has to be added in the medium to make it work and the process can be stop as soon as the light is switched off. The idea was to replace pLac with a light inducible vector afterward. | + | <td> <div id='groupparts' style='min-height:100px;width:700px;'><div style='width:300px;margin:2px;padding:20px;color:gray;border:1px solid gray'>Loading.....</div></div><script>$('#groupparts').load('/cgi/api/groupparts.cgi?t=iGEM013\&g=Grenoble-EMSE-LSU',function(){ $('#groupparts .tablesorter').tablesorter();} );</script> |
| - | It was built via PCR on the vector with primers that contained restriction site for BamHI and KpnI in order to ligate it in PQE30. The vector pQE30 already contains pLac and RBS.
| + | </td></tr></table> |
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| | + | <h3><a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141001"> BBa_K1141001 </a></h3> |
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| | + | <p> <align="center"> |
| | + | <img src="https://static.igem.org/mediawiki/2013/7/7b/Grenoble_2013_KR1.png" width="350"></p> |
| | + | <br> |
| | + | <p><strong>pLac-RBS-KillerRed</strong> |
| | + | <br> |
| | + | This BioBrick was obtained by PCR on an eukaryote vector containing the coding sequence of the <a href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Project/Biology#KillerRed">KillerRed </a> protein (generous gift of Stefan Dimitrov and Yohan Roulland, IAB Grenoble). A PCR allowed to flank it with the restriction sites KpnI and BamHI upstream and downstream. It was then ligated into the pQE30 vector(Qiagen), which contains a pLac promoter and RBS. |
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| | + | The <a href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Project/Biology#KillerRed">KillerRed </a> protein fits in our project in 2 ways: its fluorescence makes the transformed cells easily detectable and can be used to quantify the amount of live cells by our device. Its ROS-mediated killing is triggered by light, such that no chemical product has to be added in the medium to make it work and the process can be stopped as soon as the light is switched off. |
| | </p> | | </p> |
| - | </li>
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| - | <h2>KillerRed</h2>
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| - | <!-- J'écris ce document avec le balisage HTML déjà mis en place mais vu mon absence d'expérience avec ce language, ne pas hésiter à corriger les erreurs et les lourdeurs qui vont sans doute apparaître. Désolé du bordel! Je sais même pas indenter mon code... -->
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| - | <p>KillerRed is a key protein in our bacterial density control system. It represents the light-sensitive element that allows the cells to receive signals from the control device.</p><br>
| + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141002"><h3>BBa_K1141002</h3></a> |
| | + | <p> <align="center"><img src="https://static.igem.org/mediawiki/2013/7/7b/Grenoble_2013_KR1.png" width="350"></p> |
| | + | <p><strong>pLac-RBS-KillerRed</strong> |
| | + | <br>This BioBrick was obtained from BBa_K1141001 using PCR to amplify the part pLac-RBS-KillerRed. An overlapping PCR was performed to remove an EcoRI restriction site from the sequence in between pLac and RBS. The sequence was then flanked with the iGEM suffix and prefix.</p> |
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| - | <h3>Main Functions</h3><br>
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| - | <p>KillerRed is a red fluorescent protein [1], meaning that by illuminating it with wavelengths from a certain portion of the visible spectrum, it re-emits light in another portion with longer (less energetic) wavelengths. Below is the absorption and emission spectra for the KillerRed protein:</p><br><br>
| + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141000"><h3>BBa_K1141000</h3></a> |
| - | <p align="center"><img src="https://static.igem.org/mediawiki/2013/ 7/ 7f/ KillerRed_spectra2.png " alt="Killer Red absorption-emission spectra" width=" 500px"></p ><br> | + | <p > <align="center"><img src="https://static.igem.org/mediawiki/2013/ 3/ 33/ Grenoble_2013_MCherry1.png" width=" 350"></p> |
| - | <p id="legend"><strong> <em>The KillerRed protein absorption (left peak) and emission (right peak) spectra</em></strong><br> | + | <p><strong>pLac-RBS-mCherry</strong> |
| - | < em><strong>Source: </ strong></ em><a href ="http:// www. evrogen. com/ products/KillerRed/KillerRed_Detailed_description.shtml"> Detailed KillerRed description from Evrogen</a> | + | <br> This part contains the BioBricks < a href="http:/ /parts.igem.org/Part:BBa_R0010"> BBa_R0010</ a> and <a href "http:// parts. igem. org/ Part:BBa_J06702"> BBa_J06702</a> . |
| | + | It was built with standard assembly. |
| | + | <br>In the project this BioBrick was used as a negative control of KillerRed as mCherry has similar excitation and emission peaks without being cytotoxic (very low ROS production). This BioBrick also allowed us to characterize the two BioBricks BBa_R0010 and BBa_J06702 with new data. |
| | </p> | | </p> |
| - | <br><br>
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| - | <p>From the emission and absorption spectra, we can determine that the protein absorbs in the green portion of the spectrum with a peak at 585 nm and emits in the red portion of the spectrum with a peak at 610 nm, hence the name "KillerRed".<br>
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| - | Emitted light from bacteria is proportional to the amount of protein in the cells. This allows for measuring protein concentration in a cell culture.<br><br>
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| - | The most interesting function of the protein however is that it emits ROS (Reactive Oxygen Species) when fluorescing.[1]<br>
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| - | ROS are highly unstable and react chemically with many substrates including proteins, lipids and DNA. These reactions are oxidative and damage the affected molecules, making ROS toxic to the cell. With sufficient amounts of ROS, a cell's essential components can be damaged beyond repair, and the cell killed. Thus illuminating KillerRed-expressing cells with light in the green portion of the visible spectrum kills them, a mechanism that we use to control cell density in a culture.
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| - | </p>
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| - | <h3>Structure</h3><br><br>
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| - | <p>In order to understand why KillerRed has its unique properties it is necessary to look at its structure. The protein is remarkably similar to other fluorescent proteins like GFP <em>(Aequorea victoria></em> and dsRed <em>(Discosoma striata)</em>, featuring a beta-barrel housing a central alpha helix with the fluorescent chromophore at its center[2]. Normally the chromophore is protected from the outside environment by the protein shell, but this isn't the case with KillerRed.
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| - | <p align="center"><img src="https://static.igem.org/mediawiki/2013/ 8/ 8c/ DsRed_alongside_KillerRed.png" alt=" dsRed and KillerRed protein structures."></p><br> | + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141003"><h3>BBa_K1141003</h3></a> |
| - | <p id="legend"><strong><em>A comparison of the 3D structures of monomerix dsRed (left) and dimeric KillerRed (right)</em></strong><br>
| + | <p > <align="center"><img src="https://static.igem.org/mediawiki/2013/ a/ ab/ Grenoble_Gnsns_GFP.png" width=" 350"></p> |
| - | <em><strong>Credits to Carpentier P., Violot S., Blanchoin L., Bourgeois D. for the KillerRed structure, and Strongin D.E., Bevis B., Khuong N., Downing M.E., Strack R.L., Sundaram K., Glick B.S., Keenan R.J. for the dsRed structure.</strong><em>
| + | <p><strong>Green sensor-GFP</strong> |
| - | < em>< strong> Source: RCSB protein database entries < a href=" http:// www. rcsb.org/ pdb/ explore/ explore. do?structureId= 2WIQ"> 2WIQ</ a> and <a href=" http:// www. rcsb.org/ pdb/ explore/ explore.do?structureId=2VAD"> 2VAD</a>.</ strong>< em></p> <br> | + | <br> |
| | + | Built by Gibson Assembly with samples of vectors sent by Pr.Voigt lab. |
| | + | <br> |
| | + | This part was used in the <a href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Project/Biology/KR#degradation">light controlled module </a> it has been built to characterize the green sensor. |
| | + | </p> |
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| | + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141004"><h3>BBa_K1141004</h3></a> |
| | + | <p> <align="center"><img src="https://static.igem.org/mediawiki/2013/8/80/Grenoble_Redsns_rfp.png" width="350"></p> |
| | + | <p><strong>Red sensor-RFP</strong> |
| | + | <br>Built by Gibson Assembly with samples of vectors sent by Pr.Voigt lab. |
| | + | <br> |
| | + | This part is a negative control that does not produce as much ROS a KillerRed.</p> |
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| | + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141005"><h3>BBa_K1141005</h3></a> |
| | + | <p> <align="center"><img src="https://static.igem.org/mediawiki/2013/7/7b/Grenoble_Redsns_KR.png" width="350"></p> |
| | + | <p><strong>Red Sensor-KillerRed</strong> |
| | + | <br>Built by Gibson Assembly with samples of vectors sent by Pr.Voigt lab. |
| | + | <br>This BioBrick takes part in the <a href=" https:// 2013. igem.org/ Team:Grenoble-EMSE-LSU/ Project/ Biology/KR"> light controlled KillerRed concentration</a> module. It is the enhanced version of < a href="http:/ /parts.igem.org/Part:BBa_K1141001"> BBa_K1141001< /a> with a light sensitive promoter. |
| | + | </p> |
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| - | <p>KillerRed is a 240 amino acid protein with a 3D structure similar to other fluorescent proteins, with an eleven-strand beta-barrel surrounding an alpha-helix containing the chromophore, source of the protein's fluorescence and photoxicity.<br>
| + | <a href="http://parts.igem.org/wiki/index.php?title=Part:BBa_K1141006"><h3>BBa_K1141006</h3></a> |
| - | KillerRed has a DsRed-type chromophore formed with residues 67Q (glutamine), 68Y (tyrosine), and 69G (glycine), to make QYG. The corresponding coding sequence can be found at the code segment CAGTACGGC.<br><br>
| + | <p> <align="center"><img src="https://static.igem.org/mediawiki/2013/1/15/Grenoble_2013_Sspb.png" width="350"></p> |
| - | The interesting properties of the protein are directly related to a unique structural difference among fluorescent proteins, consisting in an open channel linking the chromophore to the environment outside the protein. According to litterature, this is the reason KillerRed is able to produce 1000-fold more reactive oxygen species compared to EGFP which is another ROS-producing fluorescent protein.[2]
| + | <p><strong>pBad-RBS-sspB</strong> |
| - | </p>
| + | <br>This part contains the BioBricks <a href="http://parts.igem.org/Part:BBa_K206000"> pBAD K206000</a> and sspB <a href="http://parts.igem.org/Part:BBa_K174000">K174000</a>, the RBS has been added via PCR on sspB, the rest of the BioBrick was built by standard assembly. |
| - |
| + | <br> |
| - | <h3>Origin</h3>
| + | This BioBrick is a part of the <a href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Project/Biology/KR#degradation">degradation module </a>, it enhances the degradation rate of any protein tagged with an ''ssrA''-tag.</p> |
| - | <p> KR was originally engineered from the anm2CP anthomedusa chromoprotein by individual amino acid mutations in order to obtain fluorescence and phototoxicity. [1 ] | + | </li> |
| - | </p>
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| - | </li>
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| - | <li><h2>References</h2>
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| - | <p>[1] M.E. Bulina et al., A genetically encoded photosensitizer, <em>Nature Biotechnology</em>, January 2006.<br>
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| - | [2] Sergei Pletnev et al., Structural Basis for Phototoxicity of the Genetically Encoded Photosensitizer KillerRed, <em>The Journal of Biological Chemistry</em> vol. 284, no. 46, pp. 32028–32039, November 13, 2009.<br>
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| - | [3]
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| - | </p>
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| - | </li>
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| | <li id="next"><a href="/Team:Grenoble-EMSE-LSU/Documentation/Protocols">Next Page</a></li> | | <li id="next"><a href="/Team:Grenoble-EMSE-LSU/Documentation/Protocols">Next Page</a></li> |
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