Molecular cloning of a Rho family, CDC42Ca gene from Candida albicans and its mRNA expression changes during morphogenesis

J Med Vet Mycol. May-Jun 1997;35(3):173-9.

Abstract

The small GTP-binding protein family regulates various cell functions in mammalian and yeast cells. In the yeast Saccharomyces cerevisiae it has been known to be involved in vegetative growth. As an initial attempt to explore the involvement of CDC42, a member of this family, in the regulation of morphological changes in Candida albicans, we isolated a gene encoding this protein (CDC42Ca) from this fungus. The sequence of isolated gene revealed an open reading frame of 570 nucleotides with the potential to encode a protein of 190 amino acids with a predicted molecular weight of 20.5 kDa. The deduced amino acid sequence was highly homologous to CDC42s from yeast (87.8%), human (76.4%) and Caenorhabditis elegans (73.7%). The CDC42Ca mRNA level showed a transient increase with a peak at 2 h after the fresh medium shift (28 degrees C) when cells synchronously formed buds, whereas it displayed a gradual increase up to 12 h after the medium shift (37 degrees C) with elongation of germ tubes. This suggests that CDC42 may play a role in the bud emergence and also germ tube formation in C. albicans.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Caenorhabditis elegans / genetics
  • Candida albicans / genetics*
  • Candida albicans / growth & development
  • Candida albicans / metabolism
  • Cell Cycle Proteins / biosynthesis*
  • Cell Cycle Proteins / chemistry
  • Cell Cycle Proteins / genetics*
  • Cloning, Molecular
  • Fungal Proteins / biosynthesis*
  • Fungal Proteins / genetics
  • GTP-Binding Proteins / biosynthesis*
  • GTP-Binding Proteins / chemistry
  • GTP-Binding Proteins / genetics*
  • Gene Expression Regulation, Fungal
  • Genes, Fungal
  • Genomic Library
  • Humans
  • Molecular Sequence Data
  • Molecular Weight
  • Morphogenesis
  • Open Reading Frames
  • Polymerase Chain Reaction
  • Recombinant Proteins / biosynthesis
  • Recombinant Proteins / chemistry
  • Restriction Mapping
  • Sequence Alignment
  • Sequence Homology, Amino Acid
  • cdc42 GTP-Binding Protein, Saccharomyces cerevisiae

Substances

  • Cell Cycle Proteins
  • Fungal Proteins
  • Recombinant Proteins
  • GTP-Binding Proteins
  • cdc42 GTP-Binding Protein, Saccharomyces cerevisiae

Associated data

  • GENBANK/D86561