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From 2010.igem.org

Contents 1 June 2010 1.1 June 1/2010 1.2 June 2/2010 1.3 June 3/2010

June 2010

June 1/2010

JV quantified the amount of DNA in gels run to date using ImageJ software. Results to be posted in working plasmids box.

Objective: Transform plasmids into DH5α
Method: Follow competent cell transformation protocol to transform the following:
From our ligations:

• pLacI-sRBS-Lumazine-dT
  
• pLacI-sRBS-Lumazine-dT
  
• mms6 (A6)
  
• mms6 (B6)
  
• xylE (C4)
  
• xylE (B4)
  

From the 2010 Parts Distribution:

• ECFP (Bba_E0020)
  
• EYFP (Bba_E0030)
  
• BglII Endonuclease (Bba_K112106)
  

June 2/2010

(In Lab: JV)

Objective: Isolate plasmid DNA of RBS-xylE (BBa_J33204) from DH5α cells and confirm results.

Method: "Mini-prep" the plasmid DNA using boiling lysis miniprep. Then restrict the DNA once and run on a 1% agarose gel (TAE).

Restriction Reaction

Ingredient	Volume(µL)
MilliQ H20 Water	15.75
Orange Buffer (10x)	2
pDNA (rbs-xylE)	2
EcoRI	0.25

Unrestricted Control

Ingredient	Volume(µL)
MilliQ H20 Water	16
Orange Buffer (10x)	2
pDNA (rbs-xylE)	2

DNA was restricted for 80 minutes at 37^oC.

Analyzed results on a 1% agarose gel. Load order as follows:

Lane	Sample	Volume Sample (µL)	Volume Loading Dye (µL)
1	Restricted RBS-xylE	10	2
1	Unestricted RBS-xylE†	1	2
1	1kb Ladder††	2	2

† Added 9µL MilliQ H₂O
†† Added 8µL MilliQ H₂O
Ran gel at 100V from 2 hours.
Results:

Conclusions: Plasmid DNA prep and restriction was successful.

Objective: Ligate rbs-xylE (Bba_J33204) to our double terminator, and insert it into the pSB1T3 plasmid backbone.
Method:

• Restrictions
  
  • Restrict rbs-xylE wit EcoRI and SpeI (Red Buffer)
    
  • Restrict the double terminator with XbaI and PstI (Tango Buffer)
    
  • Restrict pSB1T3 with EcoRI and PstI (Red Buffer)
    
  Set up reactions as follows:
  

  Component	Volume (µL)
  MilliQ H2O	15.5
  Buffer	2
  pDNA	2
  Enzyme	0.25 + 0.25

  Set up control reaction as follows:

  • MilliQ H₂O - 16µL
    
  • Buffer - 2µL
    
  • pDNA - 2µL
    

  Incubated reactions for 65 minutes at 37^oC
  Killed enzymes by incubating reactions for 10 minutes at 65^oC
  

• Ligation
  Reaction set up as follows:
  • T4 DNA ligase - 0.25µL
    
  • rbs-xylE - 5µL
    
  • dT - 3µL
    
  • pSB1T3 - 8µL
    
  • 10x Ligation Buffer - 2µL
    
  • MilliQ H₂O - 1.75µL
    
  Incubated reactions overnight at room temperature (total of 19.5 hours)
  Killed enzymes by incubating reactions for 10 minutes at 80^oC
  </ul>

  June 3/2010

  Objective: Ligate pLacI to sRBS-Lum-dT using the three antibiotic assembly method (according to Tom Knight's protocol). Previous ligation had miniscule quantities of DNA in ligation, not surprising it didn't work.