Difference between revisions of "Swartz:Protocols/otDNA"

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Revision as of 14:44, 29 May 2012




Italics: o-tDNA Sequence
Bold: Regions that have been mutated in o-tDNAOpt for better interaction with E. coli EfTu. (as per Young et al. 2010, J Mol Biol)
  1. Amplify the second sequence from pY71 HH-otDNAOpt plasmid using short end primers and house-made Pfu.
  2. Check on 1% w/v agarose gel to make sure that the linear template is the only product.
  3. Ethanol precipitate the nucleic acids in the solution (no PCR cleanup required):
    Add enough EDTA to obtain a concentration of 20 mM. EDTA is required to chelate Mg2+.
    Then, add enough sodium acetate (pH 5.5) to a final concentration of 300 mM.
    To this mixture, add 3 volumes of ethanol.
    Incubate on ice for 15-30 minutes.
  4. Resuspend the pellet in a buffer of choice. I used 10 mM Bis-Tris, pH 7.4.
  5. Measure [tDNA template] using Qubit assay.
  6. Titrate different amounts of the template to determine how much is required for your particular protein.