Gene profile of mid-log phase of SD medium grown Candida albicans rhb1 gene deletion strain
Ontology highlight
ABSTRACT:
ORGANISM(S): Candida albicans
PROVIDER: GSE29128 | GEO | 2012/03/15
SECONDARY ACCESSION(S): PRJNA140395
REPOSITORIES: GEO
Similar Datasets
Project description:Candida albicans is an opportunistic pathogenic yeast that is commensally found in variety of host niches. Rhb1 serves as an positive regulator of Tor1 kinase which is the central component of the TOR signaling in controlling several virulence factors. Here, we used microarray to determined changes in transcript profile while the cell lacks the RHB1 gene. 10 array generated by six batchs of individual experiment (from cell isolation to culture); each included one flask of wild type culture (SC5314) and one flask of rhb1M-bM-^HM-^F (CCT-D1)mutant culture.
2012-03-15 | E-GEOD-29128 | biostudies-arrayexpress
Project description:Eukaryotic cell growth is coordinated in response to nutrient availability, growth factors, and environmental stimuli, enabling cell–cell interactions that promote survival. The rapamycin-sensitive Tor1 protein kinase, which is conserved from yeasts to humans, participates in a signaling pathway central to cellular nutrient responses. To gain insight into Tor-mediated processes in human fungal pathogens, we have characterized Tor signaling in Candida albicans. Global transcriptional profiling revealed evolutionarily conserved roles for Tor1 in regulating the expression of genes involved in nitrogen starvation responses and ribosome biogenesis. Interestingly, we found that in C. albicans Tor1 plays a novel role in regulating the expression of several cell wall and hyphal specific genes, including adhesins and their transcriptional repressors Nrg1 and Tup1. In accord with this transcriptional profile, rapamycin induced extensive cellular aggregation in an adhesin-dependent fashion. Moreover, adhesin gene induction and cellular aggregation of rapamycin-treated cells were strongly dependent on the transactivators Bcr1 and Efg1. These findings support models in which Tor1 negatively controls cellular adhesion by governing the activities of Bcr1 and Efg1. Taken together, these results provide evidence that Tor1-mediated cellular adhesion might be broadly conserved among eukaryotic organisms.
2009-02-21 | GSE13176 | GEO
Project description:This study analyses the effects of truncation of the gene encoding Tor1 kinase in Candida albicans. The study involves a mutant tetO-TOR1-Del381 which has the N terminal regulator HEAT repeats deleted compared to a full length tetO-TOR1 strain and a heterozygous TOR1/tor1 control. Cell were grown in vitro in YEPD broth at 30˚C. In shut off experiments, doxycycline (30 µg.ml) was added to cultures to shut off the tetO promoter and inhibit Tor1 expression.
2021-08-17 | GSE182186 | GEO
Project description:The target of rapamycin (TOR) pathway is an evolutionarily conserved signal transduction system that is activated by varying nutrient and environmental signals and governs a plethora of eukaryotic biological processes, but its role in Cryptococcus neoformans remains elusive. In this study, we investigated the TOR pathway by functionally characterizing two Tor-like kinases, Tor1 and Tlk1, in C. neoformans. We successfully deleted TLK1, but not TOR1. TLK1 deletion did not result in any evident in vitro phenotypes, suggesting that Tlk1 is mainly dispensable for the growth of C. neoformans. We further demonstrated that Tor1, but not Tlk1, is essential and the target of rapamycin by constructing and analyzing conditionally regulated strains and sporulation analysis of heterozygous mutants in the diploid strain background. To analyze the functions of Tor1 in more detail, we constructed constitutive TOR1 overexpression strains. Tor1 negatively regulated thermotolerance and the DNA damage response, which are two important virulence factors of C. neoformans. We also found that TOR1 overexpression reduced Mpk1 phosphorylation, which is required for cell wall integrity and thermoresistance, and Rad53 phosphorylation, which governs the DNA damage response pathway. Tor1 is localized to the cytoplasm but enriched in the vacuole membrane. Phosphoproteomics and transcriptomics revealed that Tor1 regulates a variety of biological processes, including metabolic processes, cytoskeleton organization, ribosome biogenesis, autophagy, and stress response. TOR inhibition by rapamycin caused actin depolarization in a Tor1-dependent manner. Finally, screening rapamycin-sensitive and -resistant kinase and transcription factor mutants revealed that the TOR pathway may crosstalk with a number of signaling pathways, including the Hog1 pathway. In conclusion, our study demonstrates that a single Tor1 kinase plays a variety of roles in the fungal meningitis pathogen C. neoformans.
2019-04-03 | GSE129227 | GEO
Project description:The protein kinase Tor1 regulates adhesin expression in Candida albicans
| PRJNA109719 | ENA
Project description:Candida albicans: response of tor1 mutants to plumbagin, Raw sequence reads
| PRJNA753651 | ENA
Project description:The target of rapamycin (TOR) pathway is an evolutionarily conserved signal transduction system that is activated by varying nutrient and environmental signals and governs a plethora of eukaryotic biological processes. Nevertheless, its role in the human fungal pathogen Cryptococcus neoformans remains elusive. In this study, we investigated the TOR pathway by functionally characterizing two Tor-like kinases, Tor1 and Tlk1, in C. neoformans. We successfully deleted TLK1, but not TOR1. TLK1 deletion did not result in any evident in vitro phenotypes, except for a minor role in diamide and polyene resistance, suggesting that Tlk1 is mainly dispensable for the growth of C. neoformans. We further demonstrated that Tor1, but not Tlk1, is essential and the target of rapamycin by constructing and analyzing conditionally regulated strains and sporulation analysis of heterozygous mutants in the diploid strain background. To analyze the functions of Tor1 in more detail, we constructed constitutive TOR1 overexpression strains. Tor1 negatively regulated thermotolerance and the DNA damage response, which are two important virulence factors of C. neoformans. We also found that TOR1 overexpression reduced Mpk1 phosphorylation, which is required for cell wall integrity and thermoresistance, and Rad53 phosphorylation, which governs the DNA damage response pathway. Tor1 is localized to the cytoplasm but enriched in the vacuole membrane. Phosphoproteomics and transcriptomics revealed that Tor1 regulates a variety of biological processes, including metabolic processes, cytoskeleton organization, ribosome biogenesis, autophagy, and stress response. Finally, screening rapamycin-sensitive and -resistant kinase and transcription factor mutants revealed that the TOR pathway may crosstalk with a number of signaling pathways, including the Hog1 pathway. In conclusion, our study demonstrates that a single Tor1 kinase plays a variety of roles in the fungal meningitis pathogen C. neoformans.
2019-10-10 | PXD012983 | Pride
Project description:The incidence of candidiasis, caused mainly by the opportunistic fungal Candida albicans, remains a major concern in public health due to the emerging antifungal resistance. C. albicans modulates their proteome under different conditions trying to cope with several stressors in host niches. In this study we developed a C. albicans spectral library by analysing a total of 52 samples corresponding to cells treated with 5 and 10 mM hydrogen peroxide, 40 and 60 mM acetic acid and in the interaction with human macrophages (THP-1) at 3, 6 and 9 h (4 biological replicates). This samples represented several morphologies of C. albicans (yeast and hypha) and different culture conditions (temperature, media…) that contributed to the incorporation of different proteins into the library. The analysis of these conditions by DDA mode allowed the construction of a C. albicans spectral library comprising information of 2879 proteins and 25645 peptides which entailed a 46.5% of the total proteome. The C. albicans spectral library created constitutes a powerful proteomic tool available for the scientific community and could be useful for global (DIA) or targeted (SRM and PRM) studies.
2021-09-30 | PXD020195 | Pride
Project description:Global transcriptional profiling revealed that IL-17A induced artificial nutrient starvation conditions in Candida albicans, resulting in a downregulated target of rapamycin (TOR) signaling pathway and in increased autophagic responses and intracellular cAMP.
2012-01-18 | GSE35153 | GEO
Project description:Transcript profiling of Candida albicans tor1 kinase mutants
| PRJNA755282 | ENA