Difference between revisions of "Team:TU Darmstadt/InterLab"

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<span class="image avatar"><a href="https://2017.igem.org/Team:TU_Darmstadt"><img src="https://static.igem.org/mediawiki/2017/3/3d/LogoOWL.png" alt="home"></a></span>
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<h1 id="logo"><a href="https://2017.igem.org/Team:TU_Darmstadt">ChiTUcare</a></h1>
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<p>This page is used by the judges to evaluate your team for the <a href="https://2017.igem.org/Judging/Medals">medal criterion</a> or <a href="https://2017.igem.org/Judging/Awards"> award listed above</a>. </p>
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<p>Chitosan is a biopolymer with both antibacterial and wound-healing properties. By linking fluorophores to chitosan oligomeres smart plasters can be produced, able to detect pathogenic bacteria via proteolytic activity. Therefore, production of designed chitosan for medical purpose is of special interest.</p>
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<center><img src="https://static.igem.org/mediawiki/2017/3/36/TUDarmstadtPDplaster.png" alt="chitosan hydrogel" width="80%" style="padding: 1em 0 1em 0;"></center>
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<h4>Engineering <i>E.&nbsp;coli</i> for specific synthesis of designer chitosan</h4>
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<p>Our primary wet-lab goal is to engineer a synthetic biological circuit for the specific synthesis of chitosans in <i>E.&nbsp;coli</i>. The chemical properties as well as the bioactivity of chitosans mainly depend on three variables:  the length of the oligomers, their level of deacetylation and their patterns of deacetylation.</p>
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        <p>Our enzymatic approach includes three enzymes. A chitin synthase (<i>Rhizobium&nbsp;leguminosarum bv.&nbsp;viciae</i>) catalyzes the oligomerization of N-acetylglucosamine-UDP monomers to chitin oligomers (tetramers and pentamers). Furthermore, two chitin deacetylases that differ in their regioselectivity (<i>Sinorhizobium&nbsp;meliloti</i>  (nodB) and <i>Puccina&nbsp;graminis f.&nbsp;sp.&nbsp;tritici</i>) are regulated orthogonally, making it possible to choose between two different types of deacetylation patterns.</p>
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            <center><img src="https://static.igem.org/mediawiki/2017/2/2d/TUDarmstadtPDchitosansynthesis.png" alt="pathway chitosan" width="80%" style="padding: 1em 0 1em 0;"></center>
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<h4>Application of chitosan oligomers: chitosan hydrogel for bacterial enzyme detection</h4>
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        <p>Downstream of the synthetic biological circuit for the synthesis of chitosan pentamers, we want to give an example for an explicit application of chitosan oligomers. This shall be accomplished by building a plaster for wounds carrying the chitosan hydrogel with chitosan oligomers linked to a fluorophore via a peptide chain. When the plaster is applied to a wound it can detect bacterial protease activities and thus diagnose wound infection. Proteases will cleave the peptide linker and release the fluorophore, that is then detectable via UV-light.</p>
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            <center><img src="https://static.igem.org/mediawiki/2017/4/40/TUDarmstadtPDpeptidelinker.png" alt="peptide linker" width="50%" style="padding: 1em 0 1em 0;"></center>
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<h3>Contact Us</h3>
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<h1>InterLab</h1>
 
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<h3>Bronze Medal Criterion #4</h3>
 
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<p><b>Standard Tracks:</b> Participate in the Interlab Measurement Study and/or improve the characterization of an existing BioBrick Part or Device and enter this information on that part's Main Page in the Registry. The part that you are characterizing must NOT be from a 2017 part number range.
 
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For teams participating in the <a href="https://2017.igem.org/Competition/InterLab_Study">InterLab study</a>, all work must be shown on this page.
 
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Revision as of 15:27, 17 October 2017

MainPage

ChiTUcare

...

Chitosan is a biopolymer with both antibacterial and wound-healing properties. By linking fluorophores to chitosan oligomeres smart plasters can be produced, able to detect pathogenic bacteria via proteolytic activity. Therefore, production of designed chitosan for medical purpose is of special interest.

chitosan hydrogel

Engineering E. coli for specific synthesis of designer chitosan

Our primary wet-lab goal is to engineer a synthetic biological circuit for the specific synthesis of chitosans in E. coli. The chemical properties as well as the bioactivity of chitosans mainly depend on three variables: the length of the oligomers, their level of deacetylation and their patterns of deacetylation.

Our enzymatic approach includes three enzymes. A chitin synthase (Rhizobium leguminosarum bv. viciae) catalyzes the oligomerization of N-acetylglucosamine-UDP monomers to chitin oligomers (tetramers and pentamers). Furthermore, two chitin deacetylases that differ in their regioselectivity (Sinorhizobium meliloti (nodB) and Puccina graminis f. sp. tritici) are regulated orthogonally, making it possible to choose between two different types of deacetylation patterns.

pathway chitosan

Application of chitosan oligomers: chitosan hydrogel for bacterial enzyme detection

Downstream of the synthetic biological circuit for the synthesis of chitosan pentamers, we want to give an example for an explicit application of chitosan oligomers. This shall be accomplished by building a plaster for wounds carrying the chitosan hydrogel with chitosan oligomers linked to a fluorophore via a peptide chain. When the plaster is applied to a wound it can detect bacterial protease activities and thus diagnose wound infection. Proteases will cleave the peptide linker and release the fluorophore, that is then detectable via UV-light.

peptide linker

Contact Us

Integer eu ante ornare amet commetus vestibulum blandit integer in curae ac faucibus integer non. Adipiscing cubilia elementum integer. Integer eu ante ornare amet commetus.