Difference between revisions of "Team:Tianjin/Note/CFPS"

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<div class="entry-title" align="center" ><a href="https://www.camarts.cn/archives/4252.html" title="查看《火影忍者疾风传》中的全部作品" rel="bookmark">Notes</a></div>
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<div class="entry-title" align="center" >Notes For R-R system</div>
 
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         <h1 class="entry-title">Week1(8/1/2016-8/7/2016)</h1>
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         <h1 class="entry-title">Week1(8/24/2016-8/30/2016)</h1>
 
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<b>Ⅰ.Constraction of expression plasmid in CFPS(cell-free protein synthesis)</b><br/>
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    <b>Ⅰ.Constraction of expression plasmid in CFPS(cell-free protein synthesis)</b><br/>
 
The mutations of PETase gene had been contracted by over-lap PCR and Restriction Enzyme cutting sites(SacⅠ&EcoRⅠ) had been added to it’s ends (5’&3’) separately.
 
The mutations of PETase gene had been contracted by over-lap PCR and Restriction Enzyme cutting sites(SacⅠ&EcoRⅠ) had been added to it’s ends (5’&3’) separately.
  
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<h1 class="entry-title"><a href="https://www.camarts.cn/archives/4252.html" title="查看《火影忍者疾风传》中的全部作品" rel="bookmark">Week2(8/15/2016-8/21/2016)</a></h1>
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<p><li> XbaⅠ&SacⅠdouble restriction endonuclease digestion in <i>CFP</i> gene.</li><br />
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<p><li> XbaⅠ&SacⅠdouble restriction endonuclease digestion in <i>CFP</i> gene.</li><br />
 
<li>XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1<br/>
 
<li>XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1<br/>
 
Bands as expected(760bp&3000bp) in agarose gel , gel purification of  the digested products(3000bp).
 
Bands as expected(760bp&3000bp) in agarose gel , gel purification of  the digested products(3000bp).
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<p><li>Our strategy is to exchange the site-directed mutation PETase-M154L for the other 21 mutations and 1 wild type, separately.<br/>
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<p><li>Our strategy is to exchange the site-directed mutation PETase-M154L for the other 21 mutations and 1 wild type, separately.<br/>
 
XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1-M154L<br/>
 
XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1-M154L<br/>
 
No expected bands(3600bp&750bp) in agarose gel. We don’t find the reason why the plasmid constuced can’t be cut into the two expected bands, so we decided to change the initial strategy.  
 
No expected bands(3600bp&750bp) in agarose gel. We don’t find the reason why the plasmid constuced can’t be cut into the two expected bands, so we decided to change the initial strategy.  
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<li> Plasmid isolation</li>
 
<li> Plasmid isolation</li>
 
<li> Verification</li>
 
<li> Verification</li>
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<b>Ⅱ. Expression of the plasmids constracted before<b>
 
<b>Ⅱ. Expression of the plasmids constracted before<b>
 
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<b>The figures above show that the plasmids can express in the CFPS system, although the results of the parallel experimennts indicate that the CFPS system is unstable.<b>  
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<b>The figures above show that the plasmids can express in the CFPS system, although the results of the parallel experimennts indicate that the CFPS system is unstable.<b>            
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<h1 class="entry-title"><a href="https://www.camarts.cn/archives/4252.html" title="查看《火影忍者疾风传》中的全部作品" rel="bookmark">Week5(9/12/2016-9/18/2016)</a></h1>
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<h1 class="entry-title">Week5(9/21/2016-9/27/2016)</h1>
 
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<b>Ⅲ.Detection of Enzyme Activity<b>
 
<b>Ⅲ.Detection of Enzyme Activity<b>
 
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This attempt of detection failed, too. Because we found that Tris can react with pNPA , and pNPA would be transfered to pNP, too.  
 
This attempt of detection failed, too. Because we found that Tris can react with pNPA , and pNPA would be transfered to pNP, too.  
 
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<h1 class="entry-title">Week6(9/28/2016-10/2/2016)</h1>
 
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<li>Substrate:0.2mM pNPA water solution.<br/>
 
<li>Substrate:0.2mM pNPA water solution.<br/>
 
10 times diluted Enzyme solution(unpurified) mixed with the equal volume substrate.<br/>
 
10 times diluted Enzyme solution(unpurified) mixed with the equal volume substrate.<br/>
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   PET was been put into 20 times diluted Enzyme solution(unpurified).<br/>
 
   PET was been put into 20 times diluted Enzyme solution(unpurified).<br/>
 
After static reaction at 39℃ for 48 hours, we detected the characteristic adsorption peak of the product ,MHET, which has no other characteristic adsorption peak except in 260nm. Besides, we also deteected the system by Multispectral Scanning.
 
After static reaction at 39℃ for 48 hours, we detected the characteristic adsorption peak of the product ,MHET, which has no other characteristic adsorption peak except in 260nm. Besides, we also deteected the system by Multispectral Scanning.
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<li>Plasmids pT-13-19-15 were handed in for sequencing, which confirmed its correctness.</li>
 
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Revision as of 03:29, 4 October 2016

TEAM TIANJIN

LOGO


Team Tianjin-Attribution

Notes For R-R system

Week1(8/24/2016-8/30/2016)

Ⅰ.Constraction of expression plasmid in CFPS(cell-free protein synthesis)
The mutations of PETase gene had been contracted by over-lap PCR and Restriction Enzyme cutting sites(SacⅠ&EcoRⅠ) had been added to it’s ends (5’&3’) separately.

  • Transformation of E.coli (Trans-T1 Phage Resistant Chemically Competent Cell) with pRset_CFP-1(with AmpR) and plating on solid LB culture medium with Amp.
  • Cultivation the E.coli cells transformed yesterday in several 5mL liquid LB culture mediums with Amp at 37℃ for 12 hours.
  • Plasmid isolation of pRset_CFP-1.
  • Primers were designed for the target (CFP gene) within the plasmid pRset_CFP-1.
  • PCR with Q5-Polymerase to amplify CFP gene out of plasmid pRset_CFP-1 and add Restriction Enzyme cutting sites(XbaⅠ&SacⅠ) to it’s ends(5’&3’) separately.
    Bands as expected(about 760bp) in agarose gel , gel purification of the PCR products.

    • Show More

    Week2(8/31/2016-9/6/2016)

  • XbaⅠ&SacⅠdouble restriction endonuclease digestion in CFP gene.

  • XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1
    Bands as expected(760bp&3000bp) in agarose gel , gel purification of the digested products(3000bp).

  • Ligaion of digested pRset_CFP-1, digested CFP gene and digested PETase(M154L) gene in accordance with the 1:5:5 molecular ratio. The newly constructed plasmid is called pRset_CFP-1-M154L.
    Transformation of E.coli (Trans-T1 Phage Resistant Chemically Competent Cell) with pRset_CFP-1-M154L(with AmpR) and plating on solid LB culture medium with Amp.
    Verification : Colony PCR with fast taq Polymerase, primers: PETase-S/PETase -A, template: Colony of E.coli with plasmid pRset_CFP-1-M154L. Bands as expected(about 760bp) in agarose gel.

  • Cultivation the E.coli cells transformed yesterday in several 5mL liquid LB culture mediums with Amp at 37℃ for 12 hours.
  • Plasmid isolation of pRset_CFP-1-M154L.
    T--Tianjin--cell-free_note-1

    • Show More

    Week3(9/7/2016-9/13/2016)

  • Our strategy is to exchange the site-directed mutation PETase-M154L for the other 21 mutations and 1 wild type, separately.
    XbaⅠ&EcoRⅠdouble restriction endonuclease digestion in pRset_CFP-1-M154L
    No expected bands(3600bp&750bp) in agarose gel. We don’t find the reason why the plasmid constuced can’t be cut into the two expected bands, so we decided to change the initial strategy.

  • Ligaion of digested pRset_CFP-1, digested CFP gene and the rest 22 digested gene interested (including 21 PETase site-directed mutations geneand 1 wild type ) separately in accordance with the 1:5:5 molecular ratio. The newly constructed plasmid is called pRset_CFP-1-R90I (R90T, R90A, S92A, Q119A, M154A, W159H, W159M, N205L, N205V, S207T, S207A, I208V, S238F, S238V,A240P, S242I.)

  • Transformation
  • Plasmid isolation
  • Verification

    • Show More

    Week4(9/14/2016-9/20/2016)

    Ⅱ. Expression of the plasmids constracted before

  • We choosed 4 tubes of plasmid to express in the cell-free system firstly.
    The protocol of the cell-free protein synthesis system(50 µL) we used :
    MQ H2O     7.9µL
    Feeding buffer    25µL
    Mg2+ solution    1.1µL
    Gene( plasmid as template)  1µL
    Lysate     15µL
    (PS: the details of the system are not available)
    • Systems were expressed in 96-well plates and put the 96-well plates into the ELIASA (microplate reader) at 30℃ for 12 hours.
    T--Tianjin--cell-free_note-2
  • Parallel experiments for expression in CFPS system

    • T--Tianjin--cf-blank T--Tianjin--cf-m1 T--Tianjin--cf-m2 T--Tianjin--cf-m3 T--Tianjin--cf-m4 T--Tianjin--cf-m5 T--Tianjin--cf-m6 T--Tianjin--cf-m7 T--Tianjin--cf-m8 T--Tianjin--cf-m9 T--Tianjin--cf-m10 T--Tianjin--cf-m11 T--Tianjin--cf-m12 T--Tianjin--cf-m13 T--Tianjin--cf-m14 T--Tianjin--cf-m15 T--Tianjin--cf-m16 T--Tianjin--cf-m17 T--Tianjin--cf-m18 T--Tianjin--cf-m19 T--Tianjin--cf-m20 T--Tianjin--cf-m21 T--Tianjin--cf-m22 T--Tianjin--cf-m-no
    Show More The figures above show that the plasmids can express in the CFPS system, although the results of the parallel experimennts indicate that the CFPS system is unstable.
    Show More

    Week5(9/21/2016-9/27/2016)

    Ⅲ.Detection of Enzyme Activity

  • Substrate: 1mM pNPA Acetonitrile solution.
    10 times diluted Enzyme solution(unpurified) mixed with the equal volume substrate.
    This attempt of detection failed because our enzyme precipitated in acetonitrile.
  • Subsrtste: 1mM pNPA Tris-HCl buffer.
    10 times diluted Enzyme solution(unpurified) mixed with the equal volume substrate.
    This attempt of detection failed, too. Because we found that Tris can react with pNPA , and pNPA would be transfered to pNP, too.

    • Show More

    Week6(9/28/2016-10/2/2016)

  • Substrate:0.2mM pNPA water solution.
    10 times diluted Enzyme solution(unpurified) mixed with the equal volume substrate.
    After static reaction at 39℃ for 8 hours, we detected the characteristic adsorption peak of the product ,pNP, which has no other characteristic adsorption peak except in 400nm.
  • Substrate:PET.
    PET was been put into 20 times diluted Enzyme solution(unpurified).
    After static reaction at 39℃ for 48 hours, we detected the characteristic adsorption peak of the product ,MHET, which has no other characteristic adsorption peak except in 260nm. Besides, we also deteected the system by Multispectral Scanning.

    • Show More
    info_outline
    Notice: This page is currently under construction. Contents in this page are temporaory and will be modified several times before the final release.     — 2016 iGEM Team Tianjin

    Team Tianjin Sponsor Alltech
    Team Tianjin Sponsor GenScript
    Team Tianjin Sponsor SynbioTech