Difference between revisions of "Haynes Lab:Notebook/Investigating Photo-Switchable Synthetic Nucleosomes/2012/11/21"

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* Cut band out of gel (use UV box)
 
* Cut band out of gel (use UV box)
  
Concentrations:
+
 
...
+
Results from gel recovery:
 +
{| class="wikitable" border=1 cellpadding="5" cellspacing="0"
 +
|-
 +
| Sample|| 260|| 260/280 || ng/μL
 +
|-
 +
| H2B - X/S || ###|| ###|| ###
 +
|-
 +
| LOV - X/S  || ###|| ###|| ###
 +
|}
  
  

Revision as of 14:16, 21 November 2012

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11/21/12

  • Repeat PCR of H2B and LOV inserts
  • Note: Primers add a XbaI site upstream and the SpeI, NotI, and PstI sites downstream
  1. H2B-GFP plasmid + BB_H2B fwd + BB_H2B rev
  2. LOV plasmid + BB_LOV fwd + BB_LOV rev
Reagents H2B LOV
Plasmid DNA 0.5 μL 0.5
primer 1 (10 μM) 1.0 1.0
primer 2 (10 μM) 1.0 1.0
2x GoTaq mix 12.5 12.5
dH2O 10.0 10.0
Total 25.0 25.0

PCR program:

  • 95°C, 3 min.
  • [95°C, 30 sec; 57°C, 30 sec.; 72°C, 30 sec.] x35 cycles
  • 72°C, 3 min.
  • 4°C ∞
Expected:
1. H2B = 410
2. LOV = 461

Results of the digests are shown. KAH Fermentas GeneRuler 1kbplus.jpg

Results of the PCR products, with H2B on the left and LOV on the right. The gel was loaded with 5 μL samples.


  • ---Karmella 15:56, 21 November 2012 (EST): Digest, purification, and ligation

Assemblies

  1. H2B - X/S - 410 bp + pSB1A3 - X/S - 2000 bp
  • Digests:
    • In a 30 μL reaction, cut H2B with XbaI and SpeI
    • In a 30 μL reaction, cut LOV with XbaI and SpeI
Reagent H2B PCR LOV PCR
DNA 8.0 8.0
XbaI 1.0 1.0
SpeI 1.0 1.0
10x buffer 3.0 3.0
dH2O 10.0 10.0
Total vol. 30. 0 30.0


  • Run entire 30 μL on a 1% gel (use the big fat-tooth well comb)
  • Cut band out of gel (use UV box)


Results from gel recovery:

Sample 260 260/280 ng/μL
H2B - X/S ### ### ###
LOV - X/S ### ### ###


Results of from the digests are shown. KAH Fermentas GeneRuler 1kbplus.jpg

  1. H2B = 410
  2. LOV = 461


Dephosphorylation

> Dephosphorylation (Roche)

  1. pSB1A3 - X/S =
Reagent Volume
DNA (clean digest) up to 11.0 (~200 ng)
10x buffer d.p. 1.5
phosphatase 0.5
dH2O 2.0
  15 μL --> 37°C/ 10 min.; 75°C/ 2 min.; [final] = ~13 ng/μL
  • Heat inactivate ....


Ligation

  • Use 20 ng of vector for each ligation = 1.5 μL pSB1A3
  • Use 2x moles of H2B insert, relative to vector: xμL H2B insert = 3 * 410 bp H2B / 2000 bp pSB1A3 * 20 ng pSB1A3 / ### ng/μL H2B = 1.28 μL H2B
  • Use 2x moles of LOV insert, relative to vector: xμL LOV insert = 3 * 461 bp LOV / 2000 bp pSB1A3 * 20 ng pSB1A3 / ### ng/μL LOV = 0.8 μL LOV
  H2B LOV Negative Control
Insert DNA (2x mol vector) ### μL ### ---
Vector DNA (50 ng) 1.5 1.5 1.5
2x Roche Rapid Ligation buffer 5.0 5.0 5.0
New England Biolabs T4 ligase 1.0 1.0 1.0
dH2O ### ### ###
TOTAL 10.0 10.0 10.0
Mix the reaction(s) thoroughly by flicking the tube.
Incubate at room temperature for 10 minutes.

Proceed directly to Transformation. See http://openwetware.org/wiki/Haynes:Assembly101