Abstract
An Arxula adeninivorans integration vector was applied to a range of alternative yeast species including Saccharomyces cerevisiae, Debaryomyces hansenii, Debaryomyces polymorphus, Hansenula polymorpha and Pichia pastoris. The vector harbours a conserved A. adeninivorans-derived 25S rDNA sequence for targeting, the A. adeninivorans-derived TEF1 promoter for expression control of the reporter sequence, and the Escherichia coli-derived hph gene conferring resistance against hygromycin B for selection of recombinants. Heterologous gene expression was assessed using a green fluorescent protein (GFP) reporter gene. The plasmid was found to be integrated into the genome of the various hosts tested; recombinant strains of all species exhibited heterologous gene expressions of a similar high level.
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