Biomod/2014/Attachement: Difference between revisions
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Revision as of 10:12, 23 October 2014
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<h1> Team Nanoscooter Braunschweig </h1>
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<p align="justify" style="line-height:2em"> <font size="+2pt"><u>Pt-Particle Attachment</u></font> <br> <br> <font size="+1pt">Binding Nanoparticles to the DNA-Origami</font> </p> <p align="justify" style="line-height:2em"><font size="3pt">
To bind the Pt-nanoparticles to the DNA-origami 4 µL of the purified DNA-origami solution were mixed with 6 µL of the functionalized Pt-nanoparticles and incubated overnight.
<br>
At the next day, the solution was filtered to remove the excess of Pt-nanoparticles. 10 µL of the DNA origami solution were mixed with 400 µL of the buffer solution (PBS + 100 mM NaCl and 12 mM MgCl<sub>2</sub>) and centrifuged at 5 krcf and 4°C for 5 minutes in a 100K Amicon<sup>®</sup> filter.This was repeated 3 times. Afterwards the filter was flipped to get the bounded origami out of it and centrifuged 3 min at 1 krcf.</font>
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<font size="+1pt">Gel electrophoresis</font> <br> <font size="3pt"> <p align="justify" style="line-height:1.5em">
To verify the attachment of the platinum particles to the Nanoscooter agarose gel electrophoresis is used.
<br>We used a 0.7 % agarose gel and checked for differences between Pt-particles bound to the Nanoscooter and the Pt-particles alone. For the gel, 0.35 g of agarose were added to 50 mL 0.5x TBE buffer and heated for 2 minutes in the microwave oven. After some cooling down 2 µL Sybr<sup>®</sup> Safe DNA Gel Stain and 800 µL 1 M aqueous MgCl<sub>2</sub> solution were added to the agarose gel. After pouring this mixture into the gel chamber ist was waited until the gel got solid.
The samples were prepared like follows:
</p> <br>
Samples:
<br> 1. 10 µL DNA origami + 10 µL functionalized platinum particles (incubated over night) + 3 µL 10X BlueJuice<sup>TM</sup> Gel Loading buffer <br>
2. 10 µL functionalized platinum particles + 10 µL TE buffer with 11 mM MgCl<sub>2</sub> + 3 µL 10X BlueJuice<sup>TM</sup> Gel Loading buffer<br>
<p align="justify" style="line-height:1.5em">The agarose gel electrophoresis was carried out for 90 min and a voltage of 85 V. <font size="3pt"> </p> <br>
<div align="center"><img src="http://openwetware.org/images/5/5a/Particle-Attachement-Gel.png" width="" height="" ></div>
<i><font size="3 pt"><div align="center">Figure 1: Gel electrophoresis of the Nanoscooter + platinum particles (pocket 1) and the platinum particles (pocket 2).</font></div><br></i>
<font size="3pt">
<p align="justify" style="line-height:1.5em">As it can be seen in figure 1 the band of the Nanoscooter with platinum particles (pocket 1) runs less far than the platinum particles itself (pocket 2). This proves that the attachment of the nanoparticles to the Nanoscooter was successful.</p></font> </p>
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