0000000000871498

AUTHOR

Luisa Ventura

showing 2 related works from this author

Identification of the mstE Gene Encoding a Glucose-inducible, Low Affinity Glucose Transporter in Aspergillus nidulans

2006

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 …

DNA ComplementaryDatabases FactualMonosaccharide Transport ProteinsRecombinant Fusion ProteinsGlucose uptakeGenes FungalGreen Fluorescent ProteinsMolecular Sequence DataHyphaeRepressorBiochemistryAspergillus nidulansSubstrate SpecificityFungal ProteinsCell membraneAspergillus nidulansGene Expression Regulation FungalmedicineAmino Acid SequenceMolecular BiologyGenePhylogenyExpressed Sequence TagsFungal proteinbiologyCell MembranefungiGlucose transporterCell BiologySpores FungalBlotting Northernbiology.organism_classificationFusion proteinRepressor ProteinsKineticsGlucosemedicine.anatomical_structureMicroscopy FluorescenceBiochemistryGene DeletionJournal of Biological Chemistry
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Glucose uptake in germinating Aspergillus nidulans conidia: involvement of the creA and sorA genes

2003

d-Glucose uptake in germinating wild-typeAspergillus nidulansconidia is an energy-requiring process mediated by at least two transport systems of differing affinities for glucose: a low-affinity system (Km∼1·4 mM) and a high-affinity system (Km∼16 μM). The low-affinity system is inducible by glucose; the high-affinity system is subject to glucose repression effected by the carbon catabolite repressor CreA and is absent insorA3mutant conidia, which exhibit resistance tol-sorbose toxicity. An intermediate-affinity system (Km∼400 μM) is present insorA3conidia germinating in derepressing conditions.creAderepressed mutants show enhanced sensitivity tol-sorbose. The high-affinity uptake system ap…

biologyGlucose uptakeGenes FungalMutantFungal geneticsCatabolite repressionBiological Transport ActiveRepressorCarbohydrate metabolismbiology.organism_classificationMicrobiologyAspergillus nidulansConidiumFungal ProteinsRepressor ProteinsKineticsGlucoseBiochemistryDrug Resistance FungalAspergillus nidulansMutationSorboseMicrobiology
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