An efficient genetic transformation method for glycerol producer Candida glycerinogenes

作者：Chen Xianzhong; Fang Huiying; Rao Zhiming; Shen Wei; Zhuge Bin; Wang Zhengxiang; Zhuge Jian^*

来源：Microbiological Research, 2008, 163(5): 531-537.

DOI：10.1016/j.micres.2008.05.003

• electroporation
• glycerol production
• transformation
• Candida glycerinogenes

Transformation techniques generally require development before genetic and molecular studies of industrial yeast strains can commence. Candida glycerinogenes WL2002-5 has been used for industrial-scale glycerol production but has proven difficult to transform for molecular studies following previously published procedures. In the present study, phleomycin was used as drug-resistance marker based on perturbing plasma membranes and the tower minimum inhibitory concentration for C. glycerinogenes. We developed an efficient method for transformation of C. glycerinogenes, and parameters involved in transformation efficiency were optimized. Pretreatment of yeast cells with either dithiothreitol or lithium acetate enhanced the frequency of transformation markedly by electroporation. Significantly higher transformation efficiency was obtained when the electroporated cells were pretreated with phleomycin before plating. With this method, a maximal transformation frequency of 394 +/- 50 transformants/mu g plasmid DNA was obtained. The transformation method will foster genetic manipulation of this industrial strain.

• 出版日期2008
• 单位江南大学