Linked Life Data

9489670

Source:http://linkedlifedata.com/resource/pubmed/id/9489670

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1998-4-20
pubmed:databankReference
pubmed:abstractText
In Saccharomyces cerevisiae MATa cells, export of the a-factor mating pheromone is mediated by Ste6p, a member of the ATP-binding cassette (ABC) superfamily of transporters and a close homologue of mammalian multidrug transporter P-glycoproteins (Pgps). We have used functional complementation of a ste6delta mutation to isolate a gene encoding an ABC transporter capable of a-factor export from the pathogenic yeast, Candida albicans. This gene codes for a 1323-amino acid protein with an intramolecular duplicated structure, each repeated half containing six potential hydrophobic transmembrane segments and a hydrophilic domain with consensus sequences for an ATP-binding fold. The predicted protein displays significant sequence similarity to S. cerevisiae Ste6p and mammalian Pgps. The gene has been named HST6, for homologue of STE6. A high degree of structural conservation between the STE6 and the HST6 loci with respect to DNA sequence, physical linkage and transcriptional arrangement indicates that HST6 is the C. albicans orthologue of the S. cerevisiae STE6 gene. We show that the HST6 gene is transcribed in a haploid-specific manner in S. cerevisiae, consistent with the presence in its promoter of a consensus sequence for Mata1p-Matalpha2p binding known to mediate the repression of haploid-specific genes in S. cerevisiae diploid cells. In C. albicans, HST6 is expressed constitutively at high levels in the different cell types analysed (yeast, hyphae, white and opaque), demonstrating that HST6 transcription is not repressed in this diploid yeast, unlike in diploid S. cerevisiae, and suggesting a basic biological function for the Hst6p transporter in C. albicans. The strong similarity between Hst6p and the multidrug transporter Pgps also raises the possibility that Hst6p could be involved in resistance to antifungal drugs in C. albicans.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0950-382X
pubmed:author
pubmed:issnType
Print
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
587-98
pubmed:dateRevised
2009-7-28
pubmed:meshHeading
pubmed-meshheading:9489670-ATP-Binding Cassette Transporters, pubmed-meshheading:9489670-Amino Acid Sequence, pubmed-meshheading:9489670-Base Sequence, pubmed-meshheading:9489670-Biological Transport, pubmed-meshheading:9489670-Blotting, Southern, pubmed-meshheading:9489670-Candida albicans, pubmed-meshheading:9489670-Chromosome Mapping, pubmed-meshheading:9489670-Epitope Mapping, pubmed-meshheading:9489670-Fungal Proteins, pubmed-meshheading:9489670-Gene Expression, pubmed-meshheading:9489670-Genes, Fungal, pubmed-meshheading:9489670-Glycoproteins, pubmed-meshheading:9489670-Lipoproteins, pubmed-meshheading:9489670-Molecular Sequence Data, pubmed-meshheading:9489670-P-Glycoprotein, pubmed-meshheading:9489670-Pheromones, pubmed-meshheading:9489670-Plasmids, pubmed-meshheading:9489670-Saccharomyces cerevisiae, pubmed-meshheading:9489670-Saccharomyces cerevisiae Proteins, pubmed-meshheading:9489670-Sequence Analysis, DNA, pubmed-meshheading:9489670-Sequence Homology, Amino Acid, pubmed-meshheading:9489670-Transcription, Genetic
pubmed:year
1998
pubmed:articleTitle
A Ste6p/P-glycoprotein homologue from the asexual yeast Candida albicans transports the a-factor mating pheromone in Saccharomyces cerevisiae.
pubmed:affiliation
Institut de recherches cliniques de Montréal, Québec, Canada. raymonm@ircm.umontreal.ca
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't