Difference between revisions of "Team:Bielefeld-CeBiTec/Results/Library/Assembly"

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<div class="container text_header"><h3>Assembly</h3></div>
 
<div class="container text_header"><h3>Assembly</h3></div>
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<div class="container text ">For the assembly of our library we annealed the Fragments v1.1+v1.2 to v1 and v2.1+v2.2 to v2, and then v1+v2 to the variable region for the Monobody construct. The correct size of the assembled construct was estimated by a gelelectrophoresis (Figure 1) and then <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Results/Library/Sequencing >sequenced</a>. To get further insight into the theoretical assembly take a look <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Design>here</a>.<br> The size of the annealed v1 fragment is 114 bp, the size of v2 is 132 bp. These are the fragments inserted into our Monobody construct (<a href= http://parts.igem.org/partsdb/part_info.cgi?part_name=BBa_K2082000>BBa_K2082000</a>) to <a href=https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/CreateYours>build the library</a>.<br>
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<div class="container text ">For the assembly of our library we annealed the Fragments v1.1+v1.2 to v1 and v2.1+v2.2 to v2, and then v1+v2 to the variable region for the Monobody construct. The correct size of the assembled construct was estimated by a gelelectrophoresis (Figure 1) and then <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Results/Library/Sequencing >sequenced</a>. To get further insight into the theoretical assembly take a look <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Design>here</a>.<br> The size of the annealed v1 fragment is 114 bp, the size of v2 is 132 bp. These are the fragments inserted into our Monobody construct (<a href= http://parts.igem.org/partsdb/part_info.cgi?part_name=BBa_K2082000>BBa_K2082000</a>) to <a href=https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/CreateYours>build the library</a>.<br><a href=></a>
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<figure class="figure">
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<img src="https://static.igem.org/mediawiki/2016/d/da/Bielefeld_CeBiTec_2016_10_19_LIB_results_ass_fig_real1.png" width=20% class="figure-img" />
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<figcaption class="figure-caption"><br>
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<b>Figure 1: Gelelectrophoresis of assembled construct for Nanobodies.</b> Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Monobody construct with variable region (MB), <a href=https://www.neb.com/products/n3232-1-kb-dna-ladder>1kb DNA Ladder</a> (by <a href=https://www.neb.com/products/n3231-100-bp-dna-ladder>New England Biolabs</a>.
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</figcaption>
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</figure><br>
 
We further annealed F2.1 and F2.2 to the region containing the variable region called F2 for the Nanobody construct. To get more insight take a look <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Design>here</a>.<br> The size of the annealed F2 fragment is ought to be 143 bp, this was checked by gelectrophoresis (Figure 2) first and <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Results/Library/Sequencing >sequencing</a> later. This then can be inserted into our Nanobody construct (<a href= http://parts.igem.org/partsdb/part_info.cgi?part_name=BBa_K2082000>BBa_K2082001</a>)<br> to <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/CreateYours>create</a> the Nanobody library.
 
We further annealed F2.1 and F2.2 to the region containing the variable region called F2 for the Nanobody construct. To get more insight take a look <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Design>here</a>.<br> The size of the annealed F2 fragment is ought to be 143 bp, this was checked by gelectrophoresis (Figure 2) first and <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Results/Library/Sequencing >sequencing</a> later. This then can be inserted into our Nanobody construct (<a href= http://parts.igem.org/partsdb/part_info.cgi?part_name=BBa_K2082000>BBa_K2082001</a>)<br> to <a href= https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/CreateYours>create</a> the Nanobody library.
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xxx
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<figure class="figure">
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<img src="https://static.igem.org/mediawiki/2016/f/f0/Bielefeld_CeBiTec_2016_10_19_LIB_results_ass_fig_real2.png" width=20% class="figure-img" />
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<figcaption class="figure-caption"><br>
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<b>Figure 2: Gelelectrophoresis of assembled construct for Nanobodies.</b> Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): <a href=https://www.neb.com/products/n3232-1-kb-dna-ladder>1kb DNA Ladder</a> (by <a href=https://www.neb.com/products/n3231-100-bp-dna-ladder>New England Biolabs</a>, NB construct with variable region.
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</figcaption>
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</figure><br>
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</div>
 
</div>
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<div class="container text_header"><h3>Comparison of Polymerases</h3></div>
 
<div class="container text_header"><h3>Comparison of Polymerases</h3></div>
 
<div class="container text">As our variable regions (for each <a href=https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Scaffolds>Monobodies and Nanobodies</a>) were ordered through oligonucleotide synthesis, the strands naturally were single stranded. For the correct assembly of the variable regions into the construct, they had to be annealed. For this purpose we tried using the <a href=https://www.neb.com/products/m0212-klenow-fragment-3-5-exo>Klenow Fragment (3'→5' exo-)</a> by <a href=https://www.neb.com/>New England Biolabs</a> at first. However, the cloning of the Klenow annealed fragments was not optimal.<br>  
 
<div class="container text">As our variable regions (for each <a href=https://2016.igem.org/Team:Bielefeld-CeBiTec/Project/Library/Scaffolds>Monobodies and Nanobodies</a>) were ordered through oligonucleotide synthesis, the strands naturally were single stranded. For the correct assembly of the variable regions into the construct, they had to be annealed. For this purpose we tried using the <a href=https://www.neb.com/products/m0212-klenow-fragment-3-5-exo>Klenow Fragment (3'→5' exo-)</a> by <a href=https://www.neb.com/>New England Biolabs</a> at first. However, the cloning of the Klenow annealed fragments was not optimal.<br>  
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</figure><br>
 
</figure><br>
  
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<div class="container text">This was also used with the same four Polymerases mentioned above for the annealing of the oligonucleotides F2-1 and F2-2 to fragment F2 containing the variable region for the Nanobody. The gel photography can be viewed in Figure 2.2.</div><br>
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<div class="container text">This was also used with the same four Polymerases mentioned above for the annealing of the oligonucleotides F2-1 and F2-2 to fragment F2 containing the variable region for the Nanobody. The gel photography can be viewed in figure 2.2.</div><br>
 
<figure class="figure">
 
<figure class="figure">
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<img src="https://static.igem.org/mediawiki/2016/e/e8/Bielefeld_CeBiTec_2016_10_19_LIB_results_ass_fig2_2.png" width=60% class="figure-img" /><br>
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<img src="https://static.igem.org/mediawiki/2016/e/e8/Bielefeld_CeBiTec_2016_10_19_LIB_results_ass_fig2_2.png" width=30% class="figure-img" /><br>
 
<figcaption class="figure-caption">
 
<figcaption class="figure-caption">
 
<b>Figure 2.2: Gelelectrophoresis of annealed oligonucleotides.</b> Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): <a href=https://www.neb.com/products/n3233-low-molecular-weight-dna-ladder>Low Molecular Weight DNA Ladder</a> (by <a href=https://www.neb.com/products/n3231-100-bp-dna-ladder>New England Biolabs</a>), Fragment V1 annealed with <a href=https://www.promega.de/resources/protocols/product-information-sheets/g/gotaq-g2-dna-polymerase-protocol/>GoTaq G2</a> (by <a href=http://www.promega.de>Promega</a>), Fragment v1 annealed with <a href= http://www.merckmillipore.com/DE/de/product/KOD-DNA-Polymerase,EMD_BIO-71085?ReferrerURL=https%3A%2F%2Fwww.google.de%2F&bd=1>KOD DNA Polymerase</a> (by <a href=http://www.merckmillipore.com/>Merck Millipore</a>, Fragment V1 annealed with <a href= https://www.neb.com/products/m0530-phusion-high-fidelity-dna-polymerase >Phusion High-Fidelity DNA Polymerase</a> (by <a href= https://www.neb.com/ >New England Biolabs</a>), Fragment V1 annealed with  <a href=https://www.neb.com/products/m0491-q5-high-fidelity-dna-polymerase> Q5 High-Fidelity DNA Polymerase </a> (by <a href= https://www.neb.com/ >New England Biolabs</a>).
 
<b>Figure 2.2: Gelelectrophoresis of annealed oligonucleotides.</b> Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): <a href=https://www.neb.com/products/n3233-low-molecular-weight-dna-ladder>Low Molecular Weight DNA Ladder</a> (by <a href=https://www.neb.com/products/n3231-100-bp-dna-ladder>New England Biolabs</a>), Fragment V1 annealed with <a href=https://www.promega.de/resources/protocols/product-information-sheets/g/gotaq-g2-dna-polymerase-protocol/>GoTaq G2</a> (by <a href=http://www.promega.de>Promega</a>), Fragment v1 annealed with <a href= http://www.merckmillipore.com/DE/de/product/KOD-DNA-Polymerase,EMD_BIO-71085?ReferrerURL=https%3A%2F%2Fwww.google.de%2F&bd=1>KOD DNA Polymerase</a> (by <a href=http://www.merckmillipore.com/>Merck Millipore</a>, Fragment V1 annealed with <a href= https://www.neb.com/products/m0530-phusion-high-fidelity-dna-polymerase >Phusion High-Fidelity DNA Polymerase</a> (by <a href= https://www.neb.com/ >New England Biolabs</a>), Fragment V1 annealed with  <a href=https://www.neb.com/products/m0491-q5-high-fidelity-dna-polymerase> Q5 High-Fidelity DNA Polymerase </a> (by <a href= https://www.neb.com/ >New England Biolabs</a>).

Revision as of 19:43, 19 October 2016



Library Results

Assembly

Assembly

For the assembly of our library we annealed the Fragments v1.1+v1.2 to v1 and v2.1+v2.2 to v2, and then v1+v2 to the variable region for the Monobody construct. The correct size of the assembled construct was estimated by a gelelectrophoresis (Figure 1) and then sequenced. To get further insight into the theoretical assembly take a look here.
The size of the annealed v1 fragment is 114 bp, the size of v2 is 132 bp. These are the fragments inserted into our Monobody construct (BBa_K2082000) to build the library.

Figure 1: Gelelectrophoresis of assembled construct for Nanobodies. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Monobody construct with variable region (MB), 1kb DNA Ladder (by New England Biolabs.

We further annealed F2.1 and F2.2 to the region containing the variable region called F2 for the Nanobody construct. To get more insight take a look here.
The size of the annealed F2 fragment is ought to be 143 bp, this was checked by gelectrophoresis (Figure 2) first and sequencing later. This then can be inserted into our Nanobody construct (BBa_K2082001)
to create the Nanobody library.

Figure 2: Gelelectrophoresis of assembled construct for Nanobodies. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): 1kb DNA Ladder (by New England Biolabs, NB construct with variable region.

Comparison of Polymerases

As our variable regions (for each Monobodies and Nanobodies) were ordered through oligonucleotide synthesis, the strands naturally were single stranded. For the correct assembly of the variable regions into the construct, they had to be annealed. For this purpose we tried using the Klenow Fragment (3'→5' exo-) by New England Biolabs at first. However, the cloning of the Klenow annealed fragments was not optimal.
For example, when inserting the variable regions for the Nanobodies, the primers called F2.1 and F2.2 had to be annealed, to then be cloned into the Nanobody construct (missing the variable regions). When separating the samples (annealed oligonucleotides) by gel electrophoresis the reason why was hinted as no fragments of 143 bp were found in the bands on which the annealed sample were loaded (see Figure 1).


Figure 1: Gelelectrophoresis of annealed oligonucleotides. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Primer F2-1, Primer F2-2, 100bp plus ladder (by New England Biolabs), empty space, three times the by the Klenow Fragment annealed parts, empty space, 100bp plus ladder (by New England Biolabs).


We then concluded to use other Polymerases to anneal the oligonucleotides. For that we annealed two oligonucleotides called V1-1 and V1-2 to a fragment called V1 as well as V2-1 and V2-2 to a fragment called V2. These were used to bring in the variable region of the Monobody construct, inhabitating the randomized regions essential for binding proteins in the following.
For this purpose we used the following polymerases: Q5 High-Fidelity DNA Polymerase (by New England Biolabs), KOD DNA Polymerase (by Merck Millipore), Phusion High-Fidelity DNA Polymerase (by New England Biolabs), GoTaq G2 (by Promega).
In Figure 2.1 one can see the result of the annealing of the oligonucleotides V1-1 and V1-2 to the fragment V1 and V2-1 and V2-2 to the fragment V2 by the four polymerases.


Figure 2.1: Gelelectrophoresis of annealed oligonucleotides. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Low Molecular Weight DNA Ladder (by New England Biolabs), Fragment V1 annealed with GoTaq G2 (by Promega), Fragment V1 annealed with KOD DNA Polymerase (by Merck Millipore), Fragment V1 annealed with Phusion High-Fidelity DNA Polymerase (by New England Biolabs), Fragment V1 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs), Fragment v2 annealed with GoTaq G2 (by Promega), Fragment V2 annealed with KOD DNA Polymerase (by Merck Millipore), Fragment V2 annealed with Phusion High-Fidelity DNA Polymerase (by New England Biolabs), Fragment V2 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs).

This was also used with the same four Polymerases mentioned above for the annealing of the oligonucleotides F2-1 and F2-2 to fragment F2 containing the variable region for the Nanobody. The gel photography can be viewed in figure 2.2.


Figure 2.2: Gelelectrophoresis of annealed oligonucleotides. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Low Molecular Weight DNA Ladder (by New England Biolabs), Fragment V1 annealed with GoTaq G2 (by Promega), Fragment v1 annealed with KOD DNA Polymerase (by Merck Millipore, Fragment V1 annealed with Phusion High-Fidelity DNA Polymerase (by New England Biolabs), Fragment V1 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs).

After choosing the Q5 High-Fidelity DNA Polymerase (by New England Biolabs) for the annealing of the oligonucleotides we once again checked for the right size of the fragments mentioned above (V1, V2 and F2) on an 1% agarose gel (see Figure 3).


Figure 3: Gelelectrophoresis of Q5-Polymerase annealed oligonucleotides. Photography of 1% agarose gel dyed with ethidium bromide. Loading of the samples (from right to left): Low Molecular Weight DNA Ladder (by New England Biolabs),>), three times Fragment V1 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs), two times Fragment V2 annealed with >), Fragment V1 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs) and 2 times Fragment F2 annealed with >), Fragment V1 annealed with Q5 High-Fidelity DNA Polymerase (by New England Biolabs), Low Molecular Weight DNA Ladder (by New England Biolabs),>).

We so concluded to proceed with further annealing with the Q5 High-Fidelity DNA Polymerase (by New England Biolabs). This also resulted in a greater number of clones counted in later cloning.