Journal article
Identification of genomic binding sites for Candida glabrata Pdr1 transcription factor in wild-type and ρ0 cells
Antimicrobial agents and chemotherapy, Vol.58(11), pp.6904-6912
11/2014
DOI: 10.1128/AAC.03921-14
PMCID: PMC4249425
PMID: 25199772
Abstract
The fungal pathogen Candida glabrata is an emerging cause of candidiasis in part owing to its robust ability to acquire tolerance to the major clinical antifungal drug fluconazole. Similar to the related species Candida albicans, C. glabrata most typically gains azole tolerance via transcriptional induction of a suite of resistance genes, including a locus encoding an ABCG-type ATP-binding cassette (ABC) transporter that is referred to as CDR1 in Candida species. In C. glabrata, CDR1 expression is controlled primarily by the activity of a transcriptional activator protein called Pdr1. Strains exhibiting reduced azole susceptibility often contain substitution mutations in PDR1 that in turn lead to elevated mRNA levels of target genes with associated azole resistance. Pdr1 activity is also induced upon loss of the mitochondrial genome status and upon challenge by azole drugs. While extensive analyses of the transcriptional effects of Pdr1 have identified a number of genes that are regulated by this factor, we cannot yet separate direct from indirect target genes. Here we used chromatin immunoprecipitation (ChIP) coupled with high-throughput sequencing (ChIP-seq) to identify the promoters and associated genes directly regulated by Pdr1. These genes include many that are shared with the yeast Saccharomyces cerevisiae but others that are unique to C. glabrata, including the ABC transporter-encoding locus YBT1, genes involved in DNA repair, and several others. These data provide the outline for understanding the primary response genes involved in production of Pdr1-dependent azole resistance in C. glabrata.
Details
- Title: Subtitle
- Identification of genomic binding sites for Candida glabrata Pdr1 transcription factor in wild-type and ρ0 cells
- Creators
- Sanjoy Paul - Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, Iowa USAThomas B Bair - Iowa Institute of Human Genetics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USAW Scott Moye-Rowley - Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, Iowa USA scott-moye-rowley@uiowa.edu
- Resource Type
- Journal article
- Publication Details
- Antimicrobial agents and chemotherapy, Vol.58(11), pp.6904-6912
- Publisher
- United States
- DOI
- 10.1128/AAC.03921-14
- PMID
- 25199772
- PMCID
- PMC4249425
- ISSN
- 0066-4804
- eISSN
- 1098-6596
- Grant note
- R01 GM049825 / NIGMS NIH HHS GM49825 / NIGMS NIH HHS
- Language
- English
- Date published
- 11/2014
- Academic Unit
- Molecular Physiology and Biophysics; Internal Medicine
- Record Identifier
- 9984025565702771
Metrics
28 Record Views