Pick colonies into 0.5ml of SD-Leu (or other appropriate SD medium)
Vortex for 1min
Leave to grow O/N for 18-24h at 30°C, 230-250rpm (best in 5ml bijou)
Spin yeast culture at 13,000rpm for 5 min (microfuge)
Pour off supernatant carefully and resuspend the pellet in residual liquid (~50μl)
Add 10μl Lyticase (Sigma L2524 at 5 Units/μl in TE; aliquots stored in at -20°C)
Mix thoroughly by vortexing/pipetting
Incubate 1h at 37°C, 250rpm
Add 10μl of 20% SDS and vortex for 1min
Freeze samples at -20°C
Thaw
Vortex
Start QIAGEN miniprep protocol by adding 180μl of Buffer P1 to obtain a final volume of 250μl
Add 250μl Buffer P2
Etc.. follow QIAGEN protocol
Elute DNA in 30μl of H2O
Use 20μl of eluted DNA to transform 200μl competent XL1-Blues
Plate on LB/Amp, grow up from colonies and miniprep.
Alternatively: Inoculate direct to 5ml LB/Amp O/N and on to LB/Amp plates 50:50. Isolate plasmid using QIAGEN minipreps.