Biomod/2011/Slovenia/BioNanoWizards/methtimeline: Difference between revisions

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well as RLuc and YFP combinations with other ZFPs.</li>
well as RLuc and YFP combinations with other ZFPs.</li>
   <li>Transformation of sequence-verified constructs into
   <li>Transformation of sequence-verified constructs into
production strain E. coli BL21(De3)pLysS and test productions. Analysis
production strain <em>E. coli</em> BL21(De3)pLysS and test productions. Analysis
of cell culture lysate supernatants and precipitates (inclusion bodies)
of cell culture lysate supernatants and precipitates (inclusion bodies)
with SDS-PAGE and Western blot.</li>
with SDS-PAGE and Western blot.</li>
Line 529: Line 529:
<ul>
<ul>
   <li>Production and isolation of GST-ZFP or MBP-ZFP fusions on
   <li>Production and isolation of GST-ZFP or MBP-ZFP fusions on
Ni2+-NTA resin under the native conditions (Marko, Vid). ZFP fusions are
Ni<sup>2+</sup>-NTA resin under the native conditions (Marko, Vid). ZFP fusions are
soluble and well-behaved!
soluble and well-behaved!
   </li>
   </li>
Line 578: Line 578:
Vid detected specific binding of ZFP-fusions to DNA origami with AFM!
Vid detected specific binding of ZFP-fusions to DNA origami with AFM!
   </li>
   </li>
   <li>Production and isolation of protein tethers on Ni2+-NTA
   <li>Production and isolation of protein tethers on Ni<sup>2+</sup>-NTA
resins, 2C7-MBP-6F6 and AZPA4-MBP-6F6 (Jernej).</li>
resins, 2C7-MBP-6F6 and AZPA4-MBP-6F6 (Jernej).</li>
   <li>Assembly and observation of DNA-based vertical stacks using
   <li>Assembly and observation of DNA-based vertical stacks using
10 DNA tethers after the introduction of the modified procedure (Vid),
10 DNA tethers after the introduction of the modified procedure (Vid),
yess!!</li>
yes!!!</li>
   <li>Production and isolation of MBP-RLuc-2C7 and MBP-YFP-AZPA4
   <li>Production and isolation of MBP-RLuc-2C7 and MBP-YFP-AZPA4
on Ni2+-NTA resins, SDS-PAGE &amp; Western blotting (Jernej).
on Ni<sup>2+</sup>-NTA resins, SDS-PAGE &amp; Western blotting (Jernej).
Both RLuc and YFP are functional for the BRET assay!
Both RLuc and YFP are functional for the BRET assay!
   </li>
   </li>

Latest revision as of 15:36, 2 November 2011

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</ul> <!-- End PureCSSMenu.com MENU --> </div> </div> </div> <!-- end #header --> <div id="page" class="container"> <div id="content"> <div class="post"> <div class="entry"><big><big><big><big><span

style="color: black; font-weight: bold;">Timeline of our

project</span></big></big></big></big><br> <br> <span style="font-family: Arial;"><br> </span><big style="font-family: Arial;"><big><span

style="color: black; font-weight: bold;">Before July</span></big></big><br>

<span style="font-family: Arial;"><br> </span> <ul>

 <li>Team brainstorming sessions - lead theme: how can we make

DNA origamis to work in applications? Position specific functionalization!</li>

 <li>What tools and skills do we have: DNA origami (Vid), zinc

fingers (Jernej), protein self assembly (Marko), AFM (Vid), recombinant DNA techniques (Marko, Jernej, Vid), recombinant protein production (Jernej, Marko, Vid), EMSA (Jernej), AlphaScreen (lab L12). </li>

 <li>Cloning strategy selection &amp; primer design for

GST-ZFP, MBP-ZFP and RLuc-ZFP, YFP-ZFP ORFs (Jernej, Marko, Vid).</li>

 <li>DNA origami design and verification of its assembly (Vid).</li>

</ul> <big style="font-family: Arial;"><big><span

style="color: black; font-weight: bold;"><br>

July</span></big></big><br> <span style="font-family: Arial;"><br> </span> <ul>

 <li>Cloning of ZFP chimeras into pET41a(+) vector (PCRs,

agarose gel electrophoresis, isolation of PCR fragments from the gel, ligation, transformation, plasmid isolation, control restrictions, sequencing). Marko prepared GST-AZPA4, GST-6F6, GST-2C7, GST-Zif268, GST-sZif268 and GST-PBSII constructs, Vid prepared MBP-2C7 and MBP-6F6, Jernej prepared fusion proteins with either Renilla luciferase or yellow fluorescent protein mCitrine, namely RLuc-2C7 and YFP-AZPA4 as well as RLuc and YFP combinations with other ZFPs.</li>

 <li>Transformation of sequence-verified constructs into

production strain <em>E. coli</em> BL21(De3)pLysS and test productions. Analysis of cell culture lysate supernatants and precipitates (inclusion bodies) with SDS-PAGE and Western blot.</li> </ul> <big style="font-family: Arial;"><big><span

style="color: black; font-weight: bold;"><br>

August</span></big></big><br> <span style="font-family: Arial;"><br> </span> <ul>

 <li>Production and isolation of GST-ZFP or MBP-ZFP fusions on

Ni<sup>2+</sup>-NTA resin under the native conditions (Marko, Vid). ZFP fusions are soluble and well-behaved!

 </li>
 <li>During all steps of isolation procedure protein purity was

followed by SDS-PAGE and Western Blot.</li>

 <li>Optimization of protein production conditions for RLuc-2C7

and YFP-AZPA4 chimeras to increase their solubility (variations in temperature, production media composition and IPTG concentration) (Jernej).</li> </ul> <big style="font-family: Arial;"><big><span

style="color: black; font-weight: bold;"><br>

September</span></big></big><br> <span style="font-family: Arial;"><br> </span> <ul>

 <li>Binding of MBP-ZFP and GST-ZFP fusion proteins to DNA was

followed by EMSA and AlphaScreen (Marko) and AFM (Vid). AlphaScreen assay works! ZFP-fusion proteins bind selectively to their target DNA sequences!

 </li>
 <li>Production and isolation of additional MBP-ZFP and GST-ZFP

fusions (Marko).</li>

 <li>Design of primers for DNA tethers as well as cloning

strategy outline for protein tethers, both to test vertical stacking of rectangular DNA origamis (Vid, Jernej).</li>

 <li>First attempt to prepare vertical DNA stacks was

half-successfull - 6 tethers resulted in a deformed stack, back to the drawing board.</li>

 <li>Cloning of protein tethers (twin ZFPs with MBP solubility

tag in between): 2C7-MBP-6F6, AZPA4-MBP-6F6 and AZPA4-MBP-2C7 (Jernej).</li>

 <li>Design of primers and subsequent 3-point ligation cloning

to obtain soluble MBP-RLuc-2C7 and MBP-YFP-AZPA4 BRET chimeras (Jernej).</li>

 <li>Primer design for heterodimeric parallel and antiparallel

coiled-coil as well as SH3 domain-SH3 ligand protein tethering constructs (they are planned to be the subject of the ongoing research, but we were running out of time to test them during the project) (Jernej).</li> </ul> <big style="font-family: Arial;"><big><span

style="color: black; font-weight: bold;"><br>

October</span></big></big><br> <span style="font-family: Arial;"><br> </span> <ul>

 <li>Further binding studies followed by EMSA, AlphaScreen

(Marko) and AFM (Vid). Vid detected specific binding of ZFP-fusions to DNA origami with AFM!

 </li>
 <li>Production and isolation of protein tethers on Ni<sup>2+</sup>-NTA

resins, 2C7-MBP-6F6 and AZPA4-MBP-6F6 (Jernej).</li>

 <li>Assembly and observation of DNA-based vertical stacks using

10 DNA tethers after the introduction of the modified procedure (Vid), yes!!!</li>

 <li>Production and isolation of MBP-RLuc-2C7 and MBP-YFP-AZPA4

on Ni<sup>2+</sup>-NTA resins, SDS-PAGE &amp; Western blotting (Jernej). Both RLuc and YFP are functional for the BRET assay!

 </li>
 <li>The last week was dedicated to refining and finalizing the

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