Expression of one-hybrid fusions with Staphylococcus aureus lexA in Candida albicans confirms that Nrg1 is a transcriptional repressor and that Gcn4 is a transcriptional activator

Claire L. Russell, Alistair J. P. Brown

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


In the pathogenic fungus, Candida albicans, Nrgl down-regulates the expression of morphogenetic genes and is presumed to act as a transcriptional repressor. In contrast, Gcn4 up-regulates amino acid biosynthetic genes and is presumed to be a transcriptional activator. However, these presumptions remain to be tested directly. A classic approach has been to use a one-hybrid assay that exploits the Escherichia coli lexA protein fusions. However in C albicans, the alternate decoding of CUG as serine prevents the expression of heterologous genes such as lexA, which contain numerous CUG codons. Therefore, we have developed a one-hybrid system, based on the Staphylococcus aureus lexA gene, as a tool for one-hybrid analyses of transcription factors in C. dalbicans. Using this one-hybrid system we have confirmed directly the positive and negative transcriptional activities of Nrgl and Gcn4 in C. albicans. (c) 2005 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)676-683
Number of pages7
JournalFungal Genetics and Biology
Issue number8
Early online date8 Jun 2005
Publication statusPublished - Aug 2005


  • Candida albicans
  • transcription
  • Gcn4
  • Nrg1
  • lexA3
  • protein-protein interactions
  • regulates hyphal development
  • amino-acid starvation
  • saccharomyces-cerevisiae
  • filamentous growth
  • gene-expression
  • morphogenesis
  • virulence
  • yeast
  • system

Cite this