Difference between revisions of "Haynes Lab:Notebook/Investigating Photo-Switchable Synthetic Nucleosomes/2012/11/26"

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|style="background-color: #F2F2F2" align="center"|<html><img src="/images/9/94/Report.png" border="0" /></html> [[{{#sub:{{FULLPAGENAME}}|0|-11}}|Main project page]]<br />{{#if:{{#lnpreventry:{{FULLPAGENAME}}}}|<html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>[[{{#lnpreventry:{{FULLPAGENAME}}}}{{!}}Previous entry]]<html>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</html>}}{{#if:{{#lnnextentry:{{FULLPAGENAME}}}}|[[{{#lnnextentry:{{FULLPAGENAME}}}}{{!}}Next entry]]<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html>}}
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==November 26, 2012==
 
==November 26, 2012==
* Waiting for Gibson assembly primers to arrive
+
'''Gibson assembly written by Dr. Haynes'''
 +
*All 8 primers were ordered
 +
 
 +
The Gibson assembly method joins double stranded fragments that have overlapping matching ends. Matching ends (instead of BioBrick cut sites) are artificially added via PCR. To do Gibson assembly, we need primers that span 40 bp across junctions of the individual parts.
 +
 +
 
 +
 
 +
 
 +
 
 +
We will cut the vector with XbaI and SpeI so the ends will look like this:
 +
 +
pSB1A3 left end: …tctggaattcgcggccgctt/
 +
 +
pSB1A3 right end: /ctagtagcggccgctgcagt…
 +
 +
 
 +
 
 +
 
 +
We want to join the following, and add a "6-histidine" tag (and stop codon) for antibody staining:
 +
 +
1. pSB1A3 left end / H2B / LOV +His tag/ pSB1A3 right end
 +
 +
…to get a circular plasmid.
 +
 +
 
 +
 
 +
 
 +
Let's also try swapping LOV and H2B (like you suggested before) just to see what happens
 +
 +
2. pSB1A3 left end / LOV / H2B +His tag/ pSB1A3 right end
 +
 +
 
 +
 
 +
 
 +
Each part gets a 40 bp forward and reverse primer. A dash indicates the junction between the parts:
 +
 +
 
 +
 
 +
 
 +
*For assembly 1, amplify H2B with
 +
# "1A3/H2B fwd", 5'- tctggaattcgcggccgcttCTAGA-ATGCCAGAGCCAGCGAAGTC
 +
# "H2B/LOV rev", 5'-CGTTCAAGTGTAGTAGCCAA-CTTAGCGCTGGTGTACTTGG
 +
 +
*…and amplify LOV with
 +
# "H2B/LOV fwd", 5'-CCAAGTACACCAGCGCTAAG-TTGGCTACTACACTTGAACG
 +
# "LOV+his/1A3 rev", 5'- actgcagcggccgctactagT-ttagtggtgatggtgatgatg-AAGTTCTTTTGCCGCCTCAT
 +
 +
After PCR of each part, the two PCR products will be mixed with the X/S cut vector and subjected to isothermal assembly: http://openwetware.org/wiki/Haynes:Gibson_Assembly
 +
 +
 
 +
 
 +
 
 +
* For assembly 2, amplify LOV with
 +
# "1A3/LOV fwd", 5'-tctggaattcgcggccgcttCTAGA-TTGGCTACTACACTTGAACG
 +
# "LOV/H2B rev", 5'-GACTTCGCTGGCTCTGGCAT-AAGTTCTTTTGCCGCCTCAT
 +
 +
* …and amplify H2B with
 +
# "LOV/H2B fwd", 5'-ATGAGGCGGCAAAAGAACTT-ATGCCAGAGCCAGCGAAGTC
 +
# "H2B+his/1A3 rev", 5'-actgcagcggccgctactagT-ttagtggtgatggtgatgatg-CTTAGCGCTGGTGTACTTGG
 +
 +
 
 +
 
  
 
<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
 
<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->

Latest revision as of 21:19, 26 September 2017

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November 26, 2012

Gibson assembly written by Dr. Haynes

  • All 8 primers were ordered

The Gibson assembly method joins double stranded fragments that have overlapping matching ends. Matching ends (instead of BioBrick cut sites) are artificially added via PCR. To do Gibson assembly, we need primers that span 40 bp across junctions of the individual parts.



We will cut the vector with XbaI and SpeI so the ends will look like this:

pSB1A3 left end: …tctggaattcgcggccgctt/

pSB1A3 right end: /ctagtagcggccgctgcagt…



We want to join the following, and add a "6-histidine" tag (and stop codon) for antibody staining:

1. pSB1A3 left end / H2B / LOV +His tag/ pSB1A3 right end

…to get a circular plasmid.



Let's also try swapping LOV and H2B (like you suggested before) just to see what happens

2. pSB1A3 left end / LOV / H2B +His tag/ pSB1A3 right end



Each part gets a 40 bp forward and reverse primer. A dash indicates the junction between the parts:



  • For assembly 1, amplify H2B with
  1. "1A3/H2B fwd", 5'- tctggaattcgcggccgcttCTAGA-ATGCCAGAGCCAGCGAAGTC
  2. "H2B/LOV rev", 5'-CGTTCAAGTGTAGTAGCCAA-CTTAGCGCTGGTGTACTTGG
  • …and amplify LOV with
  1. "H2B/LOV fwd", 5'-CCAAGTACACCAGCGCTAAG-TTGGCTACTACACTTGAACG
  2. "LOV+his/1A3 rev", 5'- actgcagcggccgctactagT-ttagtggtgatggtgatgatg-AAGTTCTTTTGCCGCCTCAT

After PCR of each part, the two PCR products will be mixed with the X/S cut vector and subjected to isothermal assembly: http://openwetware.org/wiki/Haynes:Gibson_Assembly



  • For assembly 2, amplify LOV with
  1. "1A3/LOV fwd", 5'-tctggaattcgcggccgcttCTAGA-TTGGCTACTACACTTGAACG
  2. "LOV/H2B rev", 5'-GACTTCGCTGGCTCTGGCAT-AAGTTCTTTTGCCGCCTCAT
  • …and amplify H2B with
  1. "LOV/H2B fwd", 5'-ATGAGGCGGCAAAAGAACTT-ATGCCAGAGCCAGCGAAGTC
  2. "H2B+his/1A3 rev", 5'-actgcagcggccgctactagT-ttagtggtgatggtgatgatg-CTTAGCGCTGGTGTACTTGG