Identification of the mstE gene encoding a glucose-inducible, low affinity glucose transporter in Aspergillus nidulans

Josep V. Forment, Michel Flipphi, Daniel Ramón, Luisa Ventura, Andrew P. MacCabe

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Abstract

The mstE gene encoding a low affinity glucose transporter active during the germination of Aspergillus nidulans conidia on glucose medium has been identified. mstE expression also occurs in hyphae, is induced in the presence of other repressing carbon sources besides glucose, and is dependent on the function of the transcriptional repressor CreA. The expression of MstE and its subcellular distribution have been studied using a MstE-sGFP fusion protein. Concordant with data on mstE expression, MstE-sGFP is synthesized in the presence of repressing carbon sources, and fluorescence at the periphery of conidia and hyphae is consistent with MstE location in the plasma membrane. Deletion of mstE has no morphological phenotype but results in the absence of low affinity glucose uptake kinetics, the latter being substituted by a high affinity system.

Original languageEnglish
Pages (from-to)8339-8346
Number of pages8
JournalJournal of Biological Chemistry
Volume281
Issue number13
DOIs
Publication statusPublished - Mar 31 2006

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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