Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1981861 | FEBS Open Bio | 2012 | 5 Pages |
ABSTRACTTransformation of fungi by complementation of auxotrophs is generally much more reliable than usage of antibiotic resistance markers. In order to establish such a system for the model zygomycete Absidia glauca, a stable methionine auxotrophic mutant was isolated after X-ray mutagenesis of the minus mating type and characterized at the molecular level. The mutant is disrupted in the coding region of the Met2-1 gene, encoding homoserine O-acetyltransferase. The corresponding wild type gene was cloned, sequenced and inserted into appropriate vector plasmids. Transformants are prototrophs and show restored methionine-independent growth, based on complementation by the autonomously replicating plasmids.
▸ Methionine auxotrophic Absidia glauca X-ray mutant is disrupted in Met2. ▸ Met2 encodes homoserine O-acetyltransferase. ▸ Transformants are restored prototrophs with the cloned wild type copy.