Team:TU Darmstadt/result

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<img alt="Problem" src="/wiki/images/6/66/Darmstadt_green_Problem.jpg" width="100" height="30"></a>
<img alt="Problem" src="/wiki/images/6/66/Darmstadt_green_Problem.jpg" width="100" height="30"></a>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/solution">
 
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<img alt="solution" src="/wiki/images/8/87/Darmstadt_green_Solution.jpg" width="100" height="30"></a>
 
<a href="https://2013.igem.org/Team:TU_Darmstadt/result">
<a href="https://2013.igem.org/Team:TU_Darmstadt/result">
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<img alt="result" src="/wiki/images/2/2c/Darmstadt_green_Result.jpg" width="80" height="30"></a>
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<img alt="result" src="/wiki/images/c/ca/04._Result_(angewählt).jpg" width="80" height="30"></a>
<a href="https://2013.igem.org/Team:TU_Darmstadt/safety">
<a href="https://2013.igem.org/Team:TU_Darmstadt/safety">
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<h1 align="center"><font size="6" color="#F0F8FF" face="Arial regular">Our results</font></h1>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/result/molecular_engineering">
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<font size="8" color="#F0F8FF" face="Arial regular">Molecular engineering |</font>
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</a>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/result/electrical_engineering">
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<font size="8" color="#F0F8FF" face="Arial regular">Electrical engineering </font>
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<p text-aligne:left style="margin-left:50px; margin-right:50px" align="left">
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<b>LSSmOrange:</b><br>
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<img alt="Eppis" src="https://static.igem.org/mediawiki/2013/2/2f/Eppis.JPG" width="400" hight="500" align="left">
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LSSmOrange is an orange fluorescent protein that we want to use for FRET, we us it as a donor. In an
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actual paper Daria M. Shcherbakova[1] showed that LSSmOrange has an excitation maximum by
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437 nm and an emission maximum by 572 nm.
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In the following diagram (figure 1) one can see our results with our own expressed LSSmOrange. The
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colored dots show the different maximums. The excitation maximum is at 415 nm, another at 453 nm
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and our measured emission maximum is at 564 nm. This aberration changes nothing
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on the FRET system. The excitation maximum is big enough to stimulate mKate, the other fluorescent
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protein. Of course, we checked also the emission and excitation of our Bl21DE3 cells (data
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not shown) and we can eliminate the theories that these cells disturb this florescence measurement.
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<br><br>
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Graph"Bl21DE3pLys[pBR-IBA2-Lssmorange]"<br>
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<img alt="mainboard" src="https://static.igem.org/mediawiki/2013/7/75/Electric_main.JPG" width="400" hight="500" align="right">
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Caption: Excitation Spectrum (dashed line) and emission spectrum (solid line) from
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LssmOrange with marked maximums.<br><br>
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<b>mKate:</b><br>
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mKate2 is a red fluorescent protein that we want to use as a acceptor for FRET. According to Evrogen[2]
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mKate2 has an excitation maximum at 588 nm and an emission maximum T 633 nm. The
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diagram below (Figure 2, colored dots) shows that the excitation maximum is at 579 nm and the
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emission maximum is 611 nm. The first peak does not look exactly like a single peak, but we can see a
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clear maximum. The problem for our FRET system is the very low intensity which results
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in the next diagram (figure 3) in a huge difference of intensity of the two fluorescence
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proteins.<br><br>
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Graph"Bl21DE3pLys[pBR-IBA2-mKate]"
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Caption:Excitation Spectrum (dashed line) and emission spectrum (solid line) of
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mKate with marked maximums.<br><br>
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<b>FRET:</b><br>
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Both diagrams in an overlay shows us the FRET system. LSSmOrange is the donor and mKate is the
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acceptor. For an optimum in FRET, it should display a stronger overlap between the emission maximum of LssmOrange and the excitation maximum of mKate.<br><br>
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Graph"FRET pair LSSmOrange-mKate"
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Caption:Overlay of figure 1 and figure 2.
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The next figure is from the paper of M. Shcherbakova. In this figure one can
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clearly see the overlap between donor and acceptor in an optimal FRET system. <br><br>
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<br><br>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/labbook/DetectionConstruct">
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<img alt="Labbookdetection" border="5" width="57,5" height="50" src="/wiki/images/8/81/Book2.gif">
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<font size="6" color="#F0F8FF" face="Arial regular">Visit our lab book for the detection construct</font><br />
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</a>
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<br><br>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/labbook/Biobricks">
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<img alt="Labbookbiobricks" border="5" width="57,5" height="50" src="/wiki/images/8/81/Book2.gif">
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<font size="6" color="#F0F8FF" face="Arial regular">Visit our lab book for the fluorescence proteins</font><br />
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</a>
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<br><br>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/safety/Labjournal">
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<img alt="Labbookbiobricks" border="5" width="57,5" height="50" src="/wiki/images/8/81/Book2.gif">
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<font size="6" color="#F0F8FF" face="Arial regular">Visit our lab book for the safety construct</font><br />
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</a>
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<br>
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<br>
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<a href="https://2013.igem.org/Team:TU_Darmstadt/labbook/Cutinase">
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<img alt="Labbookdetection" border="5" width="57,5" height="50" src="/wiki/images/8/81/Book2.gif">
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<font size="6" color="#F0F8FF" face="Arial regular">Visit our lab book for the cutinase</font><br />
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</a>
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<br>
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<center><img alt="Spectra" src="/wiki/images/6/6c/ShcherbakovaSpectra.png" width="400" height="349"></center> <br>
 
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<center>Excitation and emission spectra overlay of donor LSSmOrange and acceptor mKate2<sup>[1]</sup><br>
 
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(dashed line = excitation spectrum, solid line = emission spectrum)</center><br><br><br><br>
 
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<h2>Source:</h2>
 
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[1] J Am Chem Soc. 2012 May 9; 134(18): 7913–7923. doi:10.1021/ja3018972
 
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Daria M. Shcherbakova, An orange fluorescent protein with a large Stokes shift for
 
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single-excitation multicolor FCCS and FRET imaging.<br>
 
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[2] http://www.evrogen.com/products/basicFPs.shtml
 
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Latest revision as of 03:32, 5 October 2013







Molecular engineering | Electrical engineering




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Labbookdetection Visit our lab book for the detection construct

Labbookbiobricks Visit our lab book for the fluorescence proteins

Labbookbiobricks Visit our lab book for the safety construct

Labbookdetection Visit our lab book for the cutinase

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