Abstract
The yeast Candida utilis (also referred to as Torula) is used as a whole-cell food additive and as a recombinant host for production of intracellular molecules. Here, we report recombinant C. utilis strains secreting significant amounts of Candida antarctica lipase B (CalB). Native and heterologous secretion signals led to secretion of CalB into the growth medium; CalB was enzymatically active and it carried a short N-glycosyl chain lacking extensive mannosylation. Furthermore, CalB fusions to the C. utilis Gas1 cell wall protein led to effective surface display of enzymatically active CalB and of β-galactosidase. Secretory production in C. utilis was achieved using a novel set of expression vectors containing sat1 conferring nourseothricin resistance, which could be transformed into C. utilis, Pichia jadinii, Candida albicans, and Saccharomyces cerevisiae; C. utilis promoters including the constitutive TDH3 and the highly xylose-inducible GXS1 promoters allowed efficient gene expression. These results establish C. utilis as a promising host for the secretory production of proteins.





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This work was funded by the Cluster of Industrial Biotechnology NRW CLIB2021.
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M. Kunigo and C. Buerth contributed equally to this study.
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Kunigo, M., Buerth, C., Tielker, D. et al. Heterologous protein secretion by Candida utilis . Appl Microbiol Biotechnol 97, 7357–7368 (2013). https://doi.org/10.1007/s00253-013-4890-1
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DOI: https://doi.org/10.1007/s00253-013-4890-1


