Abstract
A method that has been successfully used to generate recombinant Hansenula polymorpha strains by transformation with rDNA-targeting vectors was applied in the present study to a range of alternative yeast hosts, using vectors with an H. polymorpha-derived integration sequence. The dimorphic yeast Arxula adeninivorans, which is currently being assessed for heterologous gene expression, was the main focus of the study. As in H. polymorpha, it was possible to co-integrate more than a single plasmid carrying an expressible gene. Additionally, the vectors were examined in two further species, Pichia stipitis and Saccharomyces cerevisiae. Based on these results the design of a 'universal' fungal vector appears to be feasible.
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