Differential PbP27 expression in the yeast and mycelial forms of the Paracoccidioides brasiliensis species complex
p27 is an antigenic protein produced by Paracoccidioides brasiliensis, the etiologic agent of paracoccidioidomycosis (PCM). Despite its unknown function, it has been suggested as a putative virulence factor, proposed as a suitable target for the design of diagnostic tools and vaccines, and considere...
- Autores:
- Tipo de recurso:
- Fecha de publicación:
- 2011
- Institución:
- Universidad del Rosario
- Repositorio:
- Repositorio EdocUR - U. Rosario
- Idioma:
- eng
- OAI Identifier:
- oai:repository.urosario.edu.co:10336/24108
- Acceso en línea:
- https://doi.org/10.1016/j.fgb.2011.09.001
https://repository.urosario.edu.co/handle/10336/24108
- Palabra clave:
- Cytoplasm protein
Fungus antigen
Mercaptoethanol
Protein p27
Antigen expression
Article
Cell wall
Cellular distribution
Controlled study
Dna polymorphism
Dot hybridization
Fungal gene
Fungal genetics
Fungal phenomena and functions
Fungal strain
Fungus culture
Fungus isolate
Gene sequence
Genetic transcription
Immunohistochemistry
Mycelium
Nonhuman
Nucleotide sequence
Paracoccidioides
Paracoccidioides brasiliensis
Paracoccidioides brasiliensis species complex
Paracoccidioides brasiliensis type pb01 like
Paracoccidioides brasiliensis type ps2
Paracoccidioides brasiliensis type ps3
Paracoccidioides brasiliensis type s1
Paracoccidioides lutzii
Pbp27 gene
Phylogeny
Polyacrylamide gel electrophoresis
Priority journal
Protein localization
Real time polymerase chain reaction
Reverse transcription polymerase chain reaction
Rna translation
Sequence analysis
South american blastomycosis
Strain difference
Western blotting
Yeast
Cell wall
Fungal proteins
Immunohistochemistry
Paracoccidioides
Real-time polymerase chain reaction
Reverse transcriptase polymerase chain reaction
Yeasts
Paracoccidioides
Paracoccidioides brasiliensis
Dimorphism
Dot blot
P27 antigen
Paracoccidioides brasiliensis
Paracoccidioidomycosis
Qpcr
Western blot
polyacrylamide gel
genetic
fungal
fungal
dna
fungal
western
Antigens
Blotting
Electrophoresis
Gene expression regulation
Genes
Polymorphism
Sequence analysis
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Summary: | p27 is an antigenic protein produced by Paracoccidioides brasiliensis, the etiologic agent of paracoccidioidomycosis (PCM). Despite its unknown function, it has been suggested as a putative virulence factor, proposed as a suitable target for the design of diagnostic tools and vaccines, and considered as an enhancer in antifungal treatment of PCM. We evaluated sequence polymorphisms of PbP27 gene sequence among isolates, finding some polymorphisms associated with the isolates' phylogenetic origin. In order to determine if there was a differential expression pattern between morphological states and among isolates, we also evaluated PbP27 expression, at transcriptional and translational levels, in mycelia and yeast cultures in 14 isolates belonging to the P. brasiliensis species complex (S1, PS2, PS3, and 'Pb01-like', proposed to be named Paracoccidioides lutzii) by two techniques, real time RT-PCR (RT-qPCR) and protein dot blot. For the latter, four protein extracts from different cell localizations (SDS or ?-mercaptoethanol, cytoplasmic and extracellular proteins) were analyzed for each isolate. p27 was present in the four extracts evaluated, mainly in the SDS extract, corresponding to an extract containing proteins loosely attached to the cell wall. This information correlates with immunohistochemical analysis, where positive staining of the yeasts' cell wall was observed. We found that p27 was present in all isolates, mainly in the yeast form. This pattern was corroborated by RT-qPCR results, with higher expression levels found in the yeast form for most of the isolates. The results provide new insights into the expression patterns of this protein, and further characterize it in view of potential uses as a diagnostic and/or therapeutic tool. © 2011 Elsevier Inc. |
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