title: An efficient genetic transformation method for glycerol producer Candida glycerinogenes.
abstract: 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 lower 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+/-50transformants/mug plasmid DNA was obtained. The transformation method will foster genetic manipulation of this industrial strain.
authors.affiliation: The Key Lab of Industrial Biotechnology, The Ministry of Education and Research Center of Industrial Microorganisms, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
authors.forename: Xianzhong
authors.initials: X
authors.lastname: Chen
authors.forename: Huiying
authors.initials: H
authors.lastname: Fang
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Rao
authors.forename: Wei
authors.initials: W
authors.lastname: Shen
authors.forename: Bin
authors.initials: B
authors.lastname: Zhuge
authors.forename: Zhengxiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhuge
mesh_terms: D000085:Acetates / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002175:Candida / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D004229:Dithiothreitol / Q000494:pharmacology; D018014:Gene Transfer Techniques; D016681:Genome, Fungal; D005990:Glycerol / Q000378:metabolism*; D007218:Industrial Microbiology; D010957:Plasmids / Q000235:genetics; D014170:Transformation, Genetic
chemical_list: D000085:Acetates; D000900:Anti-Bacterial Agents; C488804:lithium acetate; D005990:Glycerol; D004229:Dithiothreitol