Cell signaling pathways in Paracoccidioides brasiliensis: inferred from comparisons with other fungi
Genet. mol. res. (Online)
;
4(2): 216-231, 30 jun. 2005. ilus, tab
Article
Dans Anglais
| LILACS
| ID: lil-445290
ABSTRACT
The human fungal pathogen Paracoccidioides brasiliensis is an ascomycete that displays a temperature-dependent dimorphic transition, appearing as a mycelium at 22 degrees C and as a yeast at 37 degrees C, this latter being the virulent form. We report on the in silico search made of the P. brasiliensis transcriptome-expressed sequence tag database for components of signaling pathways previously known to be involved in morphogenesis and virulence in other species of fungi, including Saccharomyces cerevisiae, Cryptococcus neoformans, Candida albicans, and Aspergillus fumigatus. Using this approach, it was possible to identify several protein cascades in P. brasiliensis, such as i) mitogen-activated protein kinase signaling for cell integrity, cell wall construction, pheromone/mating, and osmo-regulation, ii) the cAMP/PKA system, which regulates fungal development and virulence, iii) the Ras protein, which allows cross-talking between cascades, iv) calcium-calmodulin-calcineurin, which controls cell survival under oxidative stress, high temperature, and membrane/cell wall perturbation, and v) the target of rapamycin pathway, controlling cell growth and proliferation. The ways in which P. brasiliensis responds to the environment and modulates the expression of genes required for its survival and virulence can be inferred through comparison with other fungi for which this type of data is already available.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Paracoccidioides
/
Transcription génétique
/
Protéines fongiques
/
Transduction du signal
/
Étiquettes de séquences exprimées
Limites du sujet:
Humains
Pays comme sujet:
Amérique du Sud
/
Brésil
langue:
Anglais
Texte intégral:
Genet. mol. res. (Online)
Thème du journal:
Biologie moléculaire
/
Génétique
Année:
2005
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Embrapa Recursos Genéticos e Biotecnologia/BR
/
Universidade de Brasília/BR
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