New Paracoccidioides brasiliensis isolate reveals unexpected genomic variability in this human pathogen.

By means of genealogical concordance phylogenetic species recognition (GCPSR), we have investigated coding and non-coding regions from various genes and the ITS sequences of 7 new and 14 known isolates of Paracoccidioides brasiliensis. Such isolates grouped within the three phylogenetic groups recently reported in the genus Paracoccidioides, with one single exception, i.e.

Transcriptional response of murine macrophages upon infection with opsonized Paracoccidioides brasiliensis yeast cells.

Paracoccidioides brasiliensis is the etiologic agent of the Paracoccidioidomycosis the most common systemic mycosis in Latin America. Little is known about the regulation of genes involved in the innate immune host response to P. brasiliensis.

Cell organisation, sulphur metabolism and ion transport-related genes are differentially expressed in Paracoccidioides brasiliensis mycelium and yeast cells.

Background: Mycelium-to-yeast transition in the human host is essential for pathogenicity by the fungus Paracoccidioides brasiliensis and both cell types are therefore critical to the establishment of paracoccidioidomycosis (PCM), a systemic mycosis endemic to Latin America. The infected population is of about 10 million individuals, 2% of whom will eventually develop the disease. Previously, transcriptome analysis of mycelium and yeast cells resulted in the assembly of 6,022 sequence groups.

Functional genome of the human pathogenic fungus Paracoccidioides brasiliensis.

Paracoccidioides brasiliensis is a dimorphic and thermo-regulated fungus which is the causative agent of paracoccidioidomycosis, an endemic disease widespread in Latin America. Pathogenicity is assumed to be a consequence of the cellular differentiation process that this fungus undergoes from mycelium to yeast cells during human infection. In an effort to elucidate the molecular mechanisms involved in this process a network of Brazilian laboratories carried out a transcriptome project for both cell types.

Transcriptional profiles of the human pathogenic fungus Paracoccidioides brasiliensis in mycelium and yeast cells.

Paracoccidioides brasiliensis is the causative agent of paracoccidioidomycosis, a disease that affects 10 million individuals in Latin America. This report depicts the results of the analysis of 6,022 assembled groups from mycelium and yeast phase expressed sequence tags, covering about 80% of the estimated genome of this dimorphic, thermo-regulated fungus. The data provide a comprehensive view of the fungal metabolism, including overexpressed transcripts, stage-specific genes, and also those that are up- or down-regulated as assessed by in silico electronic subtraction and cDNA microarrays.

Functional and genetic characterization of calmodulin from the dimorphic and pathogenic fungus Paracoccidioides brasiliensis.

Calmodulin (CaM) modulates intracellular calcium signalling and acts on several metabolic pathways and gene expression regulation in many eukaryotic organisms including human fungal pathogens, such as Candida albicans and Histoplasma capsulatum. The temperature-dependent dimorphic fungus Paracoccidioides brasiliensis is the aetiological agent of paracoccidioidomycosis (PCM). The mycelium (M) to yeast (Y) transition has been shown to be essential for establishment of the infection, although the precise molecular mechanisms of dimorphism in P.