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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Expression of alanine:glyoxylate aminotransferase gene from Saccharomyces cerevisiae in Ashbya gossypii.

Two plasmids containing an autonomously replicating sequence from Saccharomyces cerevisiae were constructed. Using these vectors, the AGX1 gene encoding alanine:glyoxylate aminotransferase (AGT) from S. cerevisiae, which converts glyoxylate into glycine but is not present in Ashbya gossypii, was expressed in A. gossypii. Geneticin-resistant transformants with the plasmid having the kanamycin resistance gene under the control of the translation elongation factor 1 alpha (TEF) promoter and terminator from A. gossypii were obtained with a transformation efficiency of approximately 10-20 transformants per microgram of plasmid DNA. The specific AGT activities of A. gossypii pYPKTPAT carrying the AGX1 gene in glucose- and rapeseed-oil-containing media were 40 and 160 mU mg-1 of wet mycelial weight, respectively. The riboflavin concentrations of A. gossypii pYPKTPAT carrying AGX1 gene in glucose- and rapeseed-oil-containing media were 20 and 150 mg l-1, respectively. In the presence of 50 mM glyoxylate, the riboflavin concentration and the specific riboflavin concentration of A. gossypii pYPKTPAT were 2- and 1.3-fold those of A. gossypii pYPKT without the AGX1 gene.[1]


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