GEO DataSets

(Submitter supplied) In the pathogenic yeast Candida albicans, the zinc cluster transcription factor Upc2p has been shown to regulate expression of ERG11 and other genes involved in ergosterol biosynthesis upon exposure to azole antifungals. ERG11 encodes lanosterol demethylase, the target enzyme of this antifungal class. Over-expression of UPC2 reduces azole susceptibility, whereas its disruption results in hypersusceptibility to azoles and reduced accumulation of exogenous sterols. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platforms:

GPL5723 GPL6808

18 Samples

Download data: CEL, CHP

(Submitter supplied) In Candida albicans, the transcription factor Upc2 is central to the regulation of ergosterol biosynthesis. UPC2-activating mutations contribute to azole resistance, whereas disruption increases azole susceptibility. In the present study, we investigated the relationship of UPC2 to fluconazole susceptibility, particularly in azole-resistant strains. In addition to the reduced fluconazole MIC previously observed with UPC2 disruption, we observed a lower minimum fungicidal concentration (MFC) for a upc2Δ/Δ mutant than for its azole-susceptible parent, SC5314. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platform:

GPL6808

8 Samples

Download data: CEL

(Submitter supplied) A major mechanism of azole resistance in Candida albicans is the over-expression of the genes encoding the ABC transporters Cdr1p and Cdr2p. Constitutive over-expression of these efflux pumps is due to mutations in the gene encoding Tac1p, resulting in hyperactivity of this zinc cluster transcription factor. In order to identify the transcriptional targets of Tac1p, we examined four matched sets of clinical isolates representing the development of CDR1- and CDR2-mediated azole resistance, using gene expression profiling analysis. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platform:

GPL5723

27 Samples

Download data: CEL, CHP

(Submitter supplied) The present study describes a novel mechanism of antifungal resistance affecting the susceptibility of both the azole and echinocandin antifungals in an azole-resistant isolate from a matched pair of C. parapsilosis isolates obtained from a patient with prosthetic valve endocarditis. Transcriptome analysis indicated differential expression of several genes in the resistant isolate including upregulation of ERG1, ERG2, ERG5, ERG6, ERG11, ERG24, ERG25, ERG27, DAP1 and UPC2, of the ergosterol biosynthesis pathway. more...

Organism:

Candida parapsilosis

Type:

Expression profiling by high throughput sequencing

Platform:

GPL23488

4 Samples

Download data: CSV, XLSX

(Submitter supplied) Two of the major classes of antifungal drugs in clinical use target ergosterol biosynthesis. Despite its importance, our understanding of the transcriptional regulation of ergosterol biosynthesis genes in pathogenic fungi is essentially limited to the role of hypoxia and sterol-stress induced transcription factors such as Upc2 and Upc2A as well as homologs of Sterol Response Element Binding (SREB) factors. more...

Organism:

Nakaseomyces glabratus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL31108

25 Samples

Download data: XLSX

(Submitter supplied) Azole antifungal agents such as fluconazole exhibit fungistatic activity against Candida albicans. Strategies to enhance azole antifungal activity would be therapeutically appealing. In an effort to identify transcriptional pathways that influence fluconazole susceptibility, we sought to identify transcription factors (TFs) involved in this process. From a collection of C. albicans strains disrupted for genes encoding TFs (Homann et al., PLoS Genet. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platform:

GPL6808

8 Samples

Download data: CEL

(Submitter supplied) Constitutive overexpression of the Mdr1 efflux pump is an important mechanism of acquired drug resistance in the yeast Candida albicans. The zinc cluster transcription factor Mrr1 is a central regulator of MDR1 expression, but other transcription factors have also been implicated in MDR1 regulation. To better understand how MDR1-mediated drug resistance is achieved in this important fungal pathogen, we studied the interdependence of Mrr1 and two other MDR1 regulators, Upc2 and Cap1, in the control of MDR1 expression. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platform:

GPL6808

7 Samples

Download data: CEL, CHP

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Candida parapsilosis

Type:

Expression profiling by array

Platform:

GPL13192

11 Samples

Download data: GPR

(Submitter supplied) Azole resistance was induced in vitro by growth of a susceptible C. parapsilosis isolate in the presence of voriconazole. Whole genome microarrays were used to compare the transcriptional response of the voriconizole-resistant and susceptible isolates.

Organism:

Candida parapsilosis

Type:

Expression profiling by array

Platform:

GPL13192

4 Samples

Download data: GPR

(Submitter supplied) Azole resistance was induced in vitro by growth of a susceptible C. parapsilosis isolate in the presence of posaconazole. Whole genome microarrays were used to compare the transcriptional response of the posaconazole-resistant and susceptible isolates.

Organism:

Candida parapsilosis

Type:

Expression profiling by array

Platform:

GPL13192

3 Samples

Download data: GPR

(Submitter supplied) Azole resistance was induced in vitro by growth of a susceptible C. parapsilosis isolate in the presence of fluconazole. Whole genome microarrays were used to compare the transcriptional response of the fluconazole-resistant and susceptible isolates.

Organism:

Candida parapsilosis

Type:

Expression profiling by array

Platform:

GPL13192

4 Samples

Download data: GPR

(Submitter supplied) The goals of this study are to compare C. glabrata transcriptome profiling (RNA-seq) upon exposure to the antifungal fluconazole in order to assess antifungal response. The role of the transcription factor Rpn4 is clarified through comparison of the transcrptome profiles of WT and Rpn4 mutant cells. mRNA profiles of WT and ∆rpn4 were generated by deep sequencing, in duplicate, using Illumina HiSeq. The sequence reads that passed quality filters were analyzed with TopHat followed by HTSeq. RNA-seq data allowed to identify genes whose expression is regulated by the Rpn4 transcription factor (80 positively regulated and 212 negatively regulated) with a log2fold change ≥0.5 and p value <0.05. The transcriptomics data was then used to guide further work to detail the function of Rpn4.

Organism:

Nakaseomyces glabratus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL26394

8 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Nakaseomyces glabratus CBS 138; Nakaseomyces glabratus

Type:

Genome binding/occupancy profiling by high throughput sequencing; Expression profiling by high throughput sequencing

Platforms:

GPL30531 GPL22622

28 Samples

Download data: BIGWIG, WIG

(Submitter supplied) Purpose: Determine the number of genes that respond to the presence of a gain-of-function mutant form of the UPC2A transcription factor in Candida glabrata. Methods: Prepare total RNA from wild-type and gain-of-function G898D UPC2A cells. Use standard RNA-seq to evaluate and compare the transcriptomic changes caused by this allele of UPC2A. Results: Although a clear increase was seen in fluconazole resistance conferred by the G898D UPC2A allele, elevated transcription was only observed for 11 genes with 9 of these involved in ergosterol biosynthesis. more...

Organism:

Nakaseomyces glabratus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL22622

6 Samples

Download data: BIGWIG

(Submitter supplied) Purpose: Compare the fluconazole-induced transcriptome of isogenic wild-type and upc2A null cells. Methods: Prepare total RNA from wild-type and upc2A null cells grown under unstressed conditions or challenged with 50 microgram/ml fluconazole for 6 hours. Use standard RNA-seq to evaluate and compare the transcriptomic changes caused by fluconazole in the presence or absence of UPC2A. Results: These data established that over 100 genes were induced by fluconazole in a UPC2A-dependent manner. more...

Organism:

Nakaseomyces glabratus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL22622

12 Samples

Download data: WIG

(Submitter supplied) To determine the genomic binding sites for the Candida glabrata transcription factor Upc2A, we utilized three different strains. One was the wild-type KKY2001 which contains a wild-type copy of UPC2A but lacks any HA tag. The other two are both derived from KKY2001 but contain a 3X HA tag immediately after the start codon of UPC2A. These strains are BVGC82 and BVGC84, respectively. Both contain a single copy of a loxP element located 252 bp downstream from the UPC2A stop codon. more...

Organism:

Nakaseomyces glabratus CBS 138

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL30531

10 Samples

Download data: WIG

(Submitter supplied) STK-17, a kinase that responses to azoles transcriptionally, is required for azole resistance. By analyzing and comparing the transcriptomes from samples of N. crassa Wild Type, stk-17ko and stk-17com strain treated with or without ketoconazole, the biological processes that would be affected by stk-17 deletion was revealled.

Organism:

Neurospora crassa

Type:

Expression profiling by high throughput sequencing

Platform:

GPL29089

18 Samples

Download data: XLSX

(Submitter supplied) Transcriptome profiling of wild type and cfo1 mutant with fluconazole treatment in Cryptococcus neoformans var. grubii H99 Purpose: The goals of this study are to compare cfo1 mutant transcriptome profiling (RNA-seq) to wild-type with or without fluconazole treatment in Cryptococcus neoformans var. grubii H99. Methods: mRNA profiles of wild-type and cfo1 mutant with or without fluconazole treatment were generated by RNA-Seq, using Illumina GAIIx. more...

Organism:

Cryptococcus neoformans var. grubii H99

Type:

Expression profiling by high throughput sequencing

Platform:

GPL15546

4 Samples

Download data: TXT

(Submitter supplied) This set of experiment was done in order to analyze the effect of a dysfunctional mitochondria on C. albicans. The mutant was obtained by deleting the gene FZO1, which is known to be involved in mitochondrial biogenesis in S. cerevisiae. We show that the deletion of FZO1 leads to a change in mitochondrial morphology, which affects the mitochondrial membrane potential and causes the loss of mtDNA. Upon performing a transcriptome analysis, we observed that the mutant showed upregulation of genes like AOX2, MDR1 etc., while the genes involved in iron uptake were dysregulated. more...

Organism:

Candida albicans

Type:

Expression profiling by array

Platform:

GPL13440

6 Samples

Download data: TXT

(Submitter supplied) The pathogenic yeast species Candida glabrata has an intrinsically high resilience to azoles and a rapid capability of acquiring resistance. Azole-resistant clinical strains derive mostly from them encoding hyperactive mutants of the CgPdr1 regulator, however, strains encoding wild-type CgPdr1 variants were identified suggesting a role for CgPdr1-independent mechanisms in acquisition of resistance in vivo. more...

Organism:

Nakaseomyces glabratus

Type:

Expression profiling by array

Platform:

GPL29725

14 Samples

Download data: TXT, XLS