Candida parapsilosis
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ABSTRACT:
PROVIDER: PRJNA175661 | ENA |
REPOSITORIES: ENA
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Project description:The APSES Transcription factor Efg1 regulates a novel phenotype switch in Candida parapsilosis [RNA-seq].
| PRJNA175662 | ENA
Project description:In Candida albicans the Efg1 transcription factor (a member of the APSES family) is an important regulator of hyphal growth, and of the white-to-opaque transition. In contrast, we show that the Efg1 ortholog in Candida parapsilosis is a major regulator of a different morphological switch at the colony level, from a concentric to smooth morphology. The rate of switching is at least 100-fold increased in an efg1 knockout relative to wild type. Deleting efg1 also reduces biofilm formation, and results in increased sensitivity to SDS, Congo red, caspofungin and calcofluor white in cells of both morphologies. Biofilm reduction is more dramatic in in vitro than in in vivo models. We use ChIP-seq to show that Efg1 binds to 502 promoter regions, including 70 potential transcription factors or regulatory proteins. Several of the transcription factors belong to networks that regulate biofilm development and white-opaque switching in C. albicans. Efg1 also binds to its own promoter. The binding site for C. parapsilosis Efg1 resembles that of orthologs in other fungi. Many Efg1 targets are probably also regulated by the Ndt80 transcription factor. We show that a paralog of Efg1 (Efh1) is restricted to Candida species. Efh1 does not regulate concentric-smooth phenotype switching, biofilm formation or stress response in C. parapsilosis. Our analysis supports the hypothesis that Efg1 has an ancient role as regulator of development in fungi, but we have identified a new role in C. parapsilosis as a regulator of colony switching that is distinct from the white-opaque switch in C. albicans. RNA was isolated from C. parapsilosis wild type (three biological replicates, concentric phenotype), and from efg1 deletion strains (three biological replicates from both concentric and smooth phenotype). Gene expression was determined using strand-specific RNA-seq.
2013-06-20 | E-GEOD-41064 | biostudies-arrayexpress
Project description:In Candida albicans the Efg1 transcription factor (a member of the APSES family) is an important regulator of hyphal growth, and of the white-to-opaque transition. In contrast, we show that the Efg1 ortholog in Candida parapsilosis is a major regulator of a different morphological switch at the colony level, from a concentric to smooth morphology. The rate of switching is at least 100-fold increased in an efg1 knockout relative to wild type. Deleting efg1 also reduces biofilm formation, and results in increased sensitivity to SDS, Congo red, caspofungin and calcofluor white in cells of both morphologies. Biofilm reduction is more dramatic in in vitro than in in vivo models. We use ChIP-seq to show that Efg1 binds to 502 promoter regions, including 70 potential transcription factors or regulatory proteins. Several of the transcription factors belong to networks that regulate biofilm development and white-opaque switching in C. albicans. Efg1 also binds to its own promoter. The binding site for C. parapsilosis Efg1 resembles that of orthologs in other fungi. Many Efg1 targets are probably also regulated by the Ndt80 transcription factor. We show that a paralog of Efg1 (Efh1) is restricted to Candida species. Efh1 does not regulate concentric-smooth phenotype switching, biofilm formation or stress response in C. parapsilosis. Our analysis supports the hypothesis that Efg1 has an ancient role as regulator of development in fungi, but we have identified a new role in C. parapsilosis as a regulator of colony switching that is distinct from the white-opaque switch in C. albicans.
2013-06-20 | GSE41064 | GEO
Project description:The APSES Transcription factor Efg1 regulates a novel phenotype switch in Candida parapsilosis.
| PRJNA175659 | ENA
Project description:We use ChIP-seq to identify the targets of Efg1 in Candida parapsilosis. We show that Efg1 binds to 502 promoter regions, including 70 potential transcription factors or regulatory proteins. Several of the transcription factors belong to networks that regulate biofilm development and white-opaque switching in C. albicans. Efg1 also binds to its own promoter. The binding site for C. parapsilosis Efg1 resembles that of orthologs in other fungi. Many Efg1 targets are probably also regulated by the Ndt80 transcription factor.
2013-06-20 | GSE41063 | GEO
Project description:We use ChIP-seq to identify the targets of Efg1 in Candida parapsilosis. We show that Efg1 binds to 502 promoter regions, including 70 potential transcription factors or regulatory proteins. Several of the transcription factors belong to networks that regulate biofilm development and white-opaque switching in C. albicans. Efg1 also binds to its own promoter. The binding site for C. parapsilosis Efg1 resembles that of orthologs in other fungi. Many Efg1 targets are probably also regulated by the Ndt80 transcription factor. Efg1 in C. parapsilosis was tagged in situ using a myc epitope. Examination of Efg1-myc DNA binding sites by ChIP-seq. Three immunoprecipitated samples were sequenced and three input samples (pre-immunoprecipitation) were sequenced as controls.
2013-06-20 | E-GEOD-41063 | biostudies-arrayexpress
Project description:Abstract: Candida parapsilosis and Candida albicans are human fungal pathogens that belong to the CUG clade in the Saccharomycotina. In contrast to C. albicans, relatively little is known about the virulence properties of C. parapsilosis, a pathogen particularly associated with infections of premature neonates. We describe here the construction of >200 C. parapsilosis strains carrying double allele deletions of transcription factors, protein kinases and species-specific genes. Two independent deletions were constructed for each target gene. Growth in > 40 conditions was tested, including carbon source, temperature, and the presence of antifungal drugs. The phenotypes were compared to C. albicans strains with deletions of orthologous transcription factors. We found that many phenotypes are shared between the two species, such as the role of Upc2 as a regulator of azole resistance. Others are unique. For example, Cph2 plays a role in the hypoxic response in C. parapsilosis and not in C. albicans. We found extensive divergence between the biofilm regulators of the two species. We identified 7 transcription factors and one protein kinase that are required for biofilm development in C. parapsilosis. Only three (Efg1, Bcr1, and Ace2) have similar effects on C. albicans biofilms, whereas Cph2, Czf1, Gzf3 and Ume6 have major roles in C. parapsilosis only. In addition, two transcription factors (Brg1 and Tec1) with well-characterized roles in biofilm formation in C. albicans do not have the same function in C. parapsilosis. We also compared the transcription profile of C. parapsilosis and C. albicans biofilms. Our analysis suggests the processes shared between the two species are predominantly metabolic. C. parapsilosis mRNA profiles of wild type (WT) at 37 degree celcius in planktonic growth conditions and ace2-/-, cph2-/-, efg1-/-, czf1-/-, ume6-/-, bcr1-/- and WT in biofilm conditions were generated by deep sequencing, in triplicate, using Illumina HiSeq2000.
2014-07-21 | E-GEOD-57451 | biostudies-arrayexpress
Project description:Abstract: Candida parapsilosis and Candida albicans are human fungal pathogens that belong to the CUG clade in the Saccharomycotina. In contrast to C. albicans, relatively little is known about the virulence properties of C. parapsilosis, a pathogen particularly associated with infections of premature neonates. We describe here the construction of >200 C. parapsilosis strains carrying double allele deletions of transcription factors, protein kinases and species-specific genes. Two independent deletions were constructed for each target gene. Growth in > 40 conditions was tested, including carbon source, temperature, and the presence of antifungal drugs. The phenotypes were compared to C. albicans strains with deletions of orthologous transcription factors. We found that many phenotypes are shared between the two species, such as the role of Upc2 as a regulator of azole resistance. Others are unique. For example, Cph2 plays a role in the hypoxic response in C. parapsilosis and not in C. albicans. We found extensive divergence between the biofilm regulators of the two species. We identified 7 transcription factors and one protein kinase that are required for biofilm development in C. parapsilosis. Only three (Efg1, Bcr1, and Ace2) have similar effects on C. albicans biofilms, whereas Cph2, Czf1, Gzf3 and Ume6 have major roles in C. parapsilosis only. In addition, two transcription factors (Brg1 and Tec1) with well-characterized roles in biofilm formation in C. albicans do not have the same function in C. parapsilosis. We also compared the transcription profile of C. parapsilosis and C. albicans biofilms. Our analysis suggests the processes shared between the two species are predominantly metabolic.
2014-07-21 | GSE57451 | GEO
Project description:Whole genome microarrays were used to compare the transcriptional profile of Candida parapsilosis bcr1 knockout to wild type cells.
2011-11-04 | GSE33461 | GEO
Project description:This SuperSeries is composed of the following subset Series: GSE13717: Transcriptional profile of Candida parapsilosis in SD media GSE13722: Transcriptional response of Candida parapsilosis in low oxygen (hypoxic) conditions in SD media Refer to individual Series
2010-05-06 | E-GEOD-13832 | biostudies-arrayexpress