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Team:LZU-China/wetlab2
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| - | <td width="1201" height="265" rowspan="2"><p><img src="https://static.igem.org/mediawiki/2014/thumb/ | + | <td width="1201" height="265" rowspan="2"><p><img src="https://static.igem.org/mediawiki/2014/thumb/8/84/2.wetlab.top.jpg/800px-2.wetlab.top.jpg" width="1366" height="270" /></p></td> |
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| - | <td><p> </p> | + | <td width="75%"><p> </p> |
| + | <p> We constructed a pollutant substrate(PNP) bio-sensor coupling riboflavin synthetic gene cluster, the genetically modified E.coli can secrete riboflavin when added PNP in MFC anode medium.Riboflavin is a efficient redox mediator as well as a stimulator of MFC. We created a novel MFC devices and built a quantitative monitor system of PNP via measuring voltage increment.</p> | ||
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<p> </p> | <p> </p> | ||
| - | + | <p><a href="https://2014.igem.org/Team:LZU-China/wetlab"><img src="https://static.igem.org/mediawiki/2014/4/40/Dht1_%281%29.jpg" width="238" height="75" /></a><img src="https://static.igem.org/mediawiki/2014/2/2c/Dht1_(2).jpg" width="229" height="75" /><a href="https://2014.igem.org/Team:LZU-China/wetlab3"><img src="https://static.igem.org/mediawiki/2014/e/e8/Dht1_(3).jpg" width="204" height="75" /></a><a href="https://2014.igem.org/Team:LZU-China/wetlab4"><img src="https://static.igem.org/mediawiki/2014/0/02/Dht1_(4).jpg" width="299" height="75" /></a></p></td> | |
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| - | <td | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" height="550" valign="top"><p> </p> |
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| - | + | <div> GENETIC ENGINEERED BACTERIA</div> | |
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| - | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="30%" height="1146"><p> </p></td> | |
| - | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="57%"> | |
| + | <p> We designed this pathway for our purpose. As you can see, the NsrR is constitutive expressed in almost all E. coli orgnisms and it can repress the promoter PyeaR. In our project we found that this sensitive system is also adjusted to the PNP(p-nitrophenol). So we constructed this sensor pathway.</p> | ||
| + | <p> The sensor will cause the expression of riboflavin, a kind of mediator which can induce the generation of current in MFCs, to show the appearance of PNP. We can estimate the concentration of PNP. </p> | ||
| + | <p><img src="https://static.igem.org/mediawiki/2014/e/ee/WETAimage001.png" width="800" height="467" /></p> | ||
| + | <p align="center"> </p> | ||
| + | <p align="center"> Figure-1 The pathway of PNP sensor</p> | ||
| + | <p> </p> | ||
| + | <p> Besides, we find many genes can catalyze the reduction of Cr(VI). They can be used in the cathode to reduce these heavy metal ions.</p> | ||
| + | <p> <img src="https://static.igem.org/mediawiki/2014/3/39/WETAimage002.png" width="556" height="307" /></p> | ||
| + | <p align="center"> Figure-2 The pathway of the Cr ion reductase(yieF as an example)</p></td> | ||
| + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="13%"> </td> | ||
| + | </tr> | ||
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| + | <p> </p> | ||
| + | <p> </p></td> | ||
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| + | <td ><div> ABOUT THE CONSTRUCTION OF PNP SENSOR</div></td> | ||
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| + | <td ><p> </p> | ||
| + | <p> We found that the part BBa_K381001 by iGEM10_BCCS-Bristol is a sensor which can detect the appearance of nitrate and nitrite. So we perfomed an experience by this part to see if this part can detect PNP(p-Nitrophenol). | ||
| + | We got a good result.You can see the PNP can also induce the green fluorescence.</p> | ||
| + | <p> <img src="https://static.igem.org/mediawiki/2014/3/3c/Image005.png" width="455" height="340" /></p> | ||
| + | <p> Figure-3 Fluorescence of different system. </p> | ||
| + | <p> a.bacterial liquid with 10mM PNP; b.bacterial liquid with ddH2O;</p> | ||
| + | <p> c.bacterial liquid with 10mM KNO3; d.bacterial liquid with 10mM KCl.</p> | ||
| + | <p> </p> | ||
| + | <p> Firstly we got the plasmid with K1172303 from Registry. We cut the plasmid by EcoRI and XbaI, then put the <em>Pnsr</em>(K216005+B0030 this sequence was synthesized by company) into the gap.</p> | ||
| + | <p> </p> | ||
| + | <p> <img src="https://static.igem.org/mediawiki/2014/0/06/Image008.jpg" width="489" height="90" /></p> | ||
| + | <p align="center"> Figure-4 Construction of K1523101</p> | ||
| + | <p> </p> | ||
| + | <p> The size of the whole part is about 3700bp(without plasmid), we test the assembling result by PCR(sense:5’---TTCCCATCTATAATCCTCCCTGATTCTTCG---3’;anti-sense:5’---GAATTCTCTAGATTACAACTGTTGTTCAAGCTGTT---3’). From the gel picture we can see the size is right.</p> | ||
| + | <p> </p> | ||
| + | <p> <img src="https://static.igem.org/mediawiki/2014/c/c1/Image009.png" width="643" height="305" /></p> | ||
| + | <p align="center"> Figure-5 Gel picture of K1523101’s PCR</p> | ||
| + | <p align="center"> </p></td> | ||
| + | <td width="13%"> </td> | ||
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| + | <p> </p> | ||
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| - | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" > | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" ><div> ABOUT THE REDUCING Cr IONS GENES</div></td> |
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| - | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" ><p> </p> | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="30%"> </td> |
| - | + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="57%"><p align="left"> </p> | |
| + | <p align="left"> </p> | ||
| + | <p align="left"> We found four genes to reduce the Cr(VI) to Cr(III). They are<em> nahG, nahR, nahE, chrR</em> and <em>yieF. </em>We didn’t do the deep research about them because of time limitation. They can be used in the general plasmids such as pBR322. We just made them to be the formation of Biobrick. More uses and functions need to be demonstrated and found.</p> | ||
| + | <p align="left"><strong><em>nahG</em></strong>: We got the sequence from <em>Pseudomonas putida</em> </p> | ||
| + | <p align="left"> (Primer:sense:5’---CCGGAATTCGCGGCCGCTTCTAGATGAAAAACAATAAACCTGGCTTGCGC---3’;<br /> | ||
| + | anti-sense:5’---AAAATACTAGTAGCGGCCGCTGCAGTCACCCTTGACGTAGCACACC---3’)<br /> | ||
| + | <strong><em>nahE: </em></strong>We got the sequence from <em>Pseudomonas putida<strong> </strong></em><br /> | ||
| + | (Primer:sense:5’---CCGGAATTCGCGGCCGCTTCTAGATGTCGAATAAAATTATGAAAACGTCGCG---3’;<br /> | ||
| + | anti-sense:5’---AAAATACTAGTAGCGGCCGCTGCAGCTACTTCAATTCATTACTGTATTTAGCGTG---3’)<br /> | ||
| + | <strong><em>nahR: </em></strong>We got the sequence from <em>Pseudomonas putida<strong> </strong></em><br /> | ||
| + | (Primer:sense:5’--- CCGGAATTCGCGGCCGCTTCTAGATGAAAAACAATAAACCTGGCTTGCGC---3’;<br /> | ||
| + | anti-sense:5’---AAAATACTAGTAGCGGCCGCTGCAGTCACCCTTGACGTAGCACACC---3’)<br /> | ||
| + | <strong><em>chrR: </em></strong>We got the sequence from <em>Escherichia coli str. K-12<strong> </strong></em><br /> | ||
| + | (Primer:sense:5’--- CCGGAATTCGCGGCCGCTTCTAGATGAAAAAAATAGTCCAGTCGGAAGG---3’;<br /> | ||
| + | anti-sense:5’---AAAATACTAGTAGCGGCCGCTGCAGTCAGGCCTTTTTGTGCTGTTCAAC---3’)<br /> | ||
| + | <strong><em>yieF: </em></strong>We got the sequence from <em>Escherichia coli str. K-12<strong> </strong></em><br /> | ||
| + | (Primer:sense:5’--- GAATTCGGATCCATGTCTGAAAAATTGCAGGTGG---3’;<br /> | ||
| + | anti-sense:5’---GAATTCTCTAGATTAGATCTTAACTCGCTGAATAAA---3’)</p> | ||
| + | <p align="left"> </p> | ||
| + | <p align="left"> </p> | ||
| + | <p align="left"> </p> | ||
| + | <p align="left"> </p> | ||
| + | <p align="left"> <a href="https://2014.igem.org/Team:LZU-China/wetlab3"><img src="https://static.igem.org/mediawiki/2014/f/ff/L4.png" width="349" height="81" /></a></p> | ||
| + | <div></div> | ||
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| + | <p align="left"> </p> | ||
| + | <p align="left"> </p> | ||
| + | <p align="left"><script type="text/javascript"> | ||
| + | var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://"); | ||
| + | document.write(unescape("%3Cscript src='" + _bdhmProtocol + "hm.baidu.com/h.js%3F986011a32f84f432107ce07502765e79' type='text/javascript'%3E%3C/script%3E")); | ||
| + | </script> | ||
| + | </p></td> | ||
| + | <td background="https://static.igem.org/mediawiki/2014/a/a6/Huils.jpg" width="13%"> </td> | ||
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<span class="separate-li no-height"></span> | <span class="separate-li no-height"></span> | ||
<span class="li"><a href="https://2014.igem.org/Team:LZU-China/Attribution">Attribution</a></span> | <span class="li"><a href="https://2014.igem.org/Team:LZU-China/Attribution">Attribution</a></span> | ||
| - | <span class="li"><a href="https://2014.igem.org/Team:LZU-China/acknowledgement"> | + | <span class="li"><a href="https://2014.igem.org/Team:LZU-China/acknowledgement">Acknowledgements</a></span> |
<span class="separate-li no-height"></span> | <span class="separate-li no-height"></span> | ||
</div> | </div> | ||
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<div class="content"> | <div class="content"> | ||
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| - | <span class="li"><a href="">Team Profile</a></span> | + | <span class="li"><a href="https://igem.org/Team.cgi?year=2014&team_name=LZU-China">Team Profile</a></span> |
<span class="li"><a href="http://en.lzu.edu.cn/">Lanzhou University</a></span> | <span class="li"><a href="http://en.lzu.edu.cn/">Lanzhou University</a></span> | ||
<span class="li"><a href="https://2013.igem.org/Team:LZU-China">LZU-CHINA 2013</a></span> | <span class="li"><a href="https://2013.igem.org/Team:LZU-China">LZU-CHINA 2013</a></span> | ||
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Latest revision as of 21:46, 17 October 2014
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We constructed a pollutant substrate(PNP) bio-sensor coupling riboflavin synthetic gene cluster, the genetically modified E.coli can secrete riboflavin when added PNP in MFC anode medium.Riboflavin is a efficient redox mediator as well as a stimulator of MFC. We created a novel MFC devices and built a quantitative monitor system of PNP via measuring voltage increment.
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GENETIC ENGINEERED BACTERIA
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ABOUT THE CONSTRUCTION OF PNP SENSOR |
We found that the part BBa_K381001 by iGEM10_BCCS-Bristol is a sensor which can detect the appearance of nitrate and nitrite. So we perfomed an experience by this part to see if this part can detect PNP(p-Nitrophenol). We got a good result.You can see the PNP can also induce the green fluorescence. Figure-3 Fluorescence of different system. a.bacterial liquid with 10mM PNP; b.bacterial liquid with ddH2O; c.bacterial liquid with 10mM KNO3; d.bacterial liquid with 10mM KCl.
Firstly we got the plasmid with K1172303 from Registry. We cut the plasmid by EcoRI and XbaI, then put the Pnsr(K216005+B0030 this sequence was synthesized by company) into the gap.
Figure-4 Construction of K1523101
The size of the whole part is about 3700bp(without plasmid), we test the assembling result by PCR(sense:5’---TTCCCATCTATAATCCTCCCTGATTCTTCG---3’;anti-sense:5’---GAATTCTCTAGATTACAACTGTTGTTCAAGCTGTT---3’). From the gel picture we can see the size is right.
Figure-5 Gel picture of K1523101’s PCR
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ABOUT THE REDUCING Cr IONS GENES |
We found four genes to reduce the Cr(VI) to Cr(III). They are nahG, nahR, nahE, chrR and yieF. We didn’t do the deep research about them because of time limitation. They can be used in the general plasmids such as pBR322. We just made them to be the formation of Biobrick. More uses and functions need to be demonstrated and found. nahG: We got the sequence from Pseudomonas putida (Primer:sense:5’---CCGGAATTCGCGGCCGCTTCTAGATGAAAAACAATAAACCTGGCTTGCGC---3’;
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