Lactobacillus transformation (Berthier 1996): Difference between revisions
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*Stock solution of MgCl<sub>2</sub> | *Stock solution of MgCl<sub>2</sub> | ||
*Stock Solution of Glucose | *Stock Solution of Glucose | ||
*Electroporation Buffer (0.5M Sucrose, 10% Glycerol) | |||
==Procedure== | ==Procedure== |
Revision as of 17:57, 16 September 2011
Back to Protocols
Back to Electro-transformation of Lactobacillus spp.
Overview
General guidelines for the electro-transformation of Lactobacillus sake as described by Berthier et al. and as used by Alegre et al. with Lactobacillus plantarum.
Materials
- 50 ul of L.plantarum competent cells
- In vitro modified plasmid DNA
- MRS media + antibiotic
- Stock solution of MgCl2
- Stock Solution of Glucose
- Electroporation Buffer (0.5M Sucrose, 10% Glycerol)
Procedure
- Ensure that the In vitro modification of DNA for L. plantarum protocol has been followed.
- Thaw 50μL of competent cells on ice from aliquots in -80°C freezer.
- Add between 1 ng and 3 ug of plasmid DNA in 5 ul of TE buffer to 50 ul of freshly prepared competent cells and transfer to prechilled cuvette for electroporation (interelectrode distance 1 mm).
- Electroporation done at 13 Kv cm-1 (time constant: 2-4 ms), Set electroporation machine to 25μF and 200 Ω.
- Add 500 ul of MRS media containing 80mM MgCl2 and 55mM Glucose
- Incubate for 2 hours at 30°C.
- Plate cells on MRS plates + antibiotic resistance.
Notes
All questions, input and feedback are welcome!
References
Berthier, F., Zagorec, M., Champomier-Verge`s, M., Ehrlich, S.D. and Morel-Deville, F. (1996) Efficient transformation of Lactobacillus sake by electroporation. Microbiology 142, 1273–1279.
Alegre et al. (FEMS Microbiology Letters 241 (2004) 73–77)
Contact
- morto077@uottawa.ca
or instead, discuss this protocol. -->