Silver: Colony PCR

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Zymolyase Solution:

• Regular stock of zymolyase is 10 mg/ml diluted in water, mix by inverting, not all will go into solution (filter it) store aliquots at -20°C (minimize freeze-thawing if possible)
• Make 2.5 mg/ml zymolyase solution in 0.1 M sodium phosphate buffer pH 7.5 immediately before PCR experiment

Lysis of Yeast:

• Aliquot 15 µl 2.5 mg/ml zymo solution (in 0.1 M sodium phosphate buffer pH 7.5) into thin-walled PCR tubes
• Scrape small amount of yeast colony and resuspend in PCR tube (one lysis reaction when dilute will yield ~15 PCR reactions, only 5 µl is used for a template in each PCR re action)
• Incubate on bench (RT) for 20 min
• Place in PCR block and heat to 37°C for 5 min and then 95°C for 5 min

PCR Step:

• Dilute the lysis solution 1:5 by adding 60 ul ddH₂O to each PCR tube
• Place 5 ul of this dilution into a fresh PCR tube
• Add PCR mix (usually 45 ul total per reaction):
  • 2.5 µl 5’ Primer (10 µM)
  • 2.5 µl 3’ Primer (10 µM)
  • 5 µl Thermopol Buffer
  • 1 µl dNTPs (10 uM)
  • 33.5 µl ddH₂O
  • 0.5 µl AmpliTaq or Vent DNA Polymerase
• Run Lyse Program (LysAn50), takes about 5 hours

• Check product by running 10 µl PCR sample + 2 µl 6x DNA dye on 1% agarose gel