Functional analysis of the Zygosaccharomyces rouxii Fps1p homologue

Xue Ming Tang, Gerald Kayingo, Bernard A. Prior

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The osmotolerant yeast Zygosaccharomyces rouxii accumulates the polyols glycerol and D-arabitol intracellularly in response to hyperosmotic stress, but the membrane transport proteins regulating polyol accumulation have not been studied. We have cloned and characterized a FPS1 homologue in Z. rouxii NRRL Y2547, and its sequence revealed a 2709 bp open reading frame encoding a peptide of 692 deduced amino acids with 56.9% identity to the Saccharomyces cerevisiae Fps1p. The role of this putative membrane channel protein in polyol accumulation and release during osmoregulation was investigated. The Z. rouxii FPS1 (ZrFPS1) complemented the S. cerevisiae fps1Δ growth defect and glycerol release upon hypo-osmotic shock. Deletion of ZrFPS1 did not affect growth on glycerol as sole carbon source, suggesting that other transport proteins are involved in the uptake of glycerol. However, mutants lacking ZrFPS1 exhibited a significant decrease in glycerol and D-arabitol efflux and poor growth during hypo-osmotic conditions, suggesting that ZrFPS1 might be involved in D-arabitol transport in addition to glycerol. This is the first demonstration of a yeast gene that affects D-arabitol transport. The full-length ZrFPS1 gene sequence including upstream promoter has been deposited in the public database under Accession No. AY488133.

Original languageEnglish (US)
Pages (from-to)571-581
Number of pages11
JournalYeast
Volume22
Issue number7
DOIs
StatePublished - May 2005
Externally publishedYes

Fingerprint

Zygosaccharomyces
Zygosaccharomyces rouxii
Functional analysis
Glycerol
glycerol
Yeast
Polyols
polyols
transport proteins
Saccharomyces cerevisiae
Growth
Genes
Yeasts
Membranes
Osmoregulation
Membrane Transport Proteins
yeasts
Osmotic Pressure
Ion Channels
osmoregulation

Keywords

  • D-arabitol
  • Fps1p
  • Glycerol
  • Osmoregulation
  • Zygosaccharomyces rouxii

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Biotechnology
  • Bioengineering
  • Microbiology

Cite this

Functional analysis of the Zygosaccharomyces rouxii Fps1p homologue. / Tang, Xue Ming; Kayingo, Gerald; Prior, Bernard A.

In: Yeast, Vol. 22, No. 7, 05.2005, p. 571-581.

Research output: Contribution to journalArticle

Tang, Xue Ming ; Kayingo, Gerald ; Prior, Bernard A. / Functional analysis of the Zygosaccharomyces rouxii Fps1p homologue. In: Yeast. 2005 ; Vol. 22, No. 7. pp. 571-581.
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