Project description: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. Whole genome sequencing revealed a mutation in the ERG3 gene leading to a G111R amino acid substitution in the resistant isolate. Subsequent introduction of this allele in the native ERG3 locus in the susceptible isolate resulted in a fluconazole MIC of >64 mg/ml and a caspofungin MIC of 8 mg/ml. Corresponding allelic replacement of the wildtype allele for the mutant allele in the resistant isolate resulted in a drop in MIC to 1 mg/ml for both fluconazole and caspofungin. Sterol profiles indicated a loss of sterol demethylase activity as a result of this mutation. This work demonstrate that this G111R mutation is wholly responsible for the resistant phenotype in the C. parapsilosis resistant isolate and is the first report of this multidrug resistance mechanism.

2017-05-25 | GSE98986 | GEO

Next Generation Sequencing of Wildtype and Thioredoxin-A knockout of a clinical isolate of Acinetobacter baumannii

Project description:RNA sequencing was used to analyze the transcriptome of a thioredoxin-A knockout of a clinical isolate of Acinetobacter baumannii

2019-01-14 | GSE125017 | GEO

Expression data of enterotoxigenic (ETEC) isolate E24377A

2012-03-01 | GSE31804 | GEO

Expression data of enterotoxigenic (ETEC) isolate E24377A

Project description:ETEC is an important human pathogen. Although the mechanism of diarrhea is known in ETEC, the regulatory networks are less understood. This study was conducted to understand the global expression of ETEC isolate E24377A under different growth and environemental conditions. ETEC isolate E24377A was grown in the presence of several chemical signals, including bile salts, glucose, and pre-conditioned media (PCM) from other enteric pathogens. E24377A was also grown to different densities, to see if a quorum sensing mechanism was in place The isolate was grown in different types of media, with different ammendments, and at different growth densities. The overall goal was to determine how expression gene expression changes in the presence of chemical signals; a special emphasis was placed on the expression of known and suspected virulence and colonization factors

2012-03-01 | E-GEOD-31804 | biostudies-arrayexpress

Plantago ovata isolate:Queensland isolate

Project description:Plantago ovata isolate:Queensland isolate Transcriptome or Gene expression

| PRJNA328518 | ENA