Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Genome-wide analysis of H3K56ac across C. albicans genome in hyphae-inducing conditions

ABSTRACT: In the present study, we investigated whether the acetylation of H3K56, known as relevant for C. albicans virulence, might affect the Candida-macrophages interaction. Therefore, by the mean of the non-specific Hst3 inhibitor nicotinamide (NAM), we evaluated whether the alteration of H3K56 acetylation would affect the secretion of soluble factors by C. albicans. In particular, we tested the effect of the two different Candida growth-conditioned media (with and without NAM) on murine macrophages at the morphological and functional levels. In addition, we analyzed transcriptome modifications and genome enrichment of H3K56ac in the same experimental conditions.

INSTRUMENT(S): NextSeq 500

ORGANISM(S): Candida albicans

SUBMITTER: Marisa Conte

PROVIDER: E-MTAB-13387 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Although Candida albicans and Candida dubliniensis are most closely related, both species significantly behave differently with respect to morphogenesis and virulence. In order to gain further insight into the divergent routes for morphogenetic adaptation in both species, we investigated qualitative along with quantitative differences in the transcriptomes of both organisms by cDNA deep sequencing. Following genome-associated assembly of sequence reads we were able to generate experimentally verified databases containing 6016 and 5972 genes for C. albicans and C. dubliniensis, respectively. About 95% of the transcriptionally active regions (TARs) contain open reading frames while the remaining TARs most likely represent non-coding RNAs. Comparison of our annotations with publically available gene models for C. albicans and C. dubliniensis confirmed approximately 95% of already predicted genes, but also revealed so far unknown novel TARs in both species. Qualitative cross-species analysis of these databases revealed in addition to 5802 orthologs also 399 and 49 species-specific protein coding genes for C. albicans and C. dubliniensis, respectively. Furthermore, quantitative transcriptional profiling using RNA-Seq revealed significant differences in the expression of orthologs across both species. We defined a core subset of 84 hyphal-specific genes required for both species, as well as a set of 42 genes that seem to be specifically induced during hyphal morphogenesis in C. albicans. Species specific adaptation in C. albicans and C. dubliniensis is governed by individual genetic repertoires but also by altered regulation of conserved orthologs on the transcriptional level. We investigated qualitative along with quantitative differences in the transcriptomes of both organisms by cDNA deep sequencing. In a first step, we reevaluated the in silico predicted gene models by collecting experimental data using FLX - technology for sequencing strand-specific and normalized cDNA libraries derived from blastospores and hyphae. In the second step, quantitative RNA-Seq (GAIIX) was applied to C. albicans hyphal cells and C. dubliniensis blastospore and hyphal cells to complement reevaluation of the gene models with FLX data as well as to measure differential gene expression across the species with two biological replicates.

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Genome-wide analysis of H3K56ac across C. albicans genome in hyphae-inducing conditions

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