A Candida albicans cyclic nucleotide phosphodiesterase: Cloning and expression in Saccharomyces cerevisiae and biochemical characterization of the recombinant enzyme

L. L. Hoyer, L. B. Cieslinski, M. M. McLaughlin, T. J. Torphy, A. R. Shatzman, G. P. Livi

Research output: Contribution to journalArticle

Abstract

We have cloned a Candida albicans gene, which encodes a cyclic nucleotide phosphodiesterase (PDEase), by complementation in a Saccharomyces cerevisiae PDEase-deficient mutant. The deduced amino acid sequence is similar to that of the low-affinity PDEase of S. cerevisiae (PDE1) and the cyclic nucleotide PDEase (PD) of Dictyostelium discoideum. Biochemical analysis of recombinant protein produced in S. cerevisiae indicated that the enzyme behaves as a PDE1 homologue: it hydrolyses both cAMP (K(m) = 0.49 mM) and cGMP (K(m) = 0.25 mM), does not require divalent cations for maximal activity and is only moderately inhibited by millimolar concentrations of standard PDEase inhibitors. Based on these data, we designate the C. albicans we have cloned, PDE1. Low-stringency genomic Southern blots showed cross-hybridization between C. albicans PDE1 and DNA from Candida stellatoidea, but not with DNA from S. cerevisiae or several closely related Candida species.

Original languageEnglish (US)
Pages (from-to)1533-1542
Number of pages10
JournalMicrobiology
Volume140
Issue number7
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

Keywords

  • Candida albicans
  • Cyclic nucleotide phosphodiesterase
  • Morphogenesis

ASJC Scopus subject areas

  • Microbiology

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