Analysis and expression of STE13ca gene encoding a putative X-prolyl dipeptidyl aminopeptidase from Candida albicans

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Abstract

Candida albicans STE13ca gene was identified by its homology to the Saccharomyces cerevisiae STE13 gene that encodes for the dipeptidyl aminopeptidase A (DAP A) involved in the maturation of α-factor mating pheromone. Our study revealed that C. albicans ATCC 10231 depicts dipeptidyl aminopeptidase activity. We also analyzed the expression of the STE13ca gene homologue from this pathogenic yeast. This gene of 2793 pb is homozygotic and encodes for a predicted protein of 930 amino acids with a molecular weight of 107,035 Da. The predicted protein displays significant sequence similarity to S. cerevisiae Ste13p. This C. albicans gene is located in chromosome R. STE13ca gene increases its levels of expression in conditions of nutritional stress (proline as nitrogen source) and during formation of the germinal tube, suggesting a basic biological function for the STE13ca in this yeast.

Original languageEnglish
Pages (from-to)459-469
Number of pages11
JournalFEMS Immunology and Medical Microbiology
Volume45
Issue number3
DOIs
StatePublished - 1 Sep 2005

Keywords

  • Candida albicans
  • Dipeptidyl aminopeptidase
  • Mating
  • STE13
  • α-Pheromone

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