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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Candida parapsilosis secreted aspartic proteinases: processing and secretion
 Vinterová, Zuzana ; Heidingsfeld, Olga (advisor) ; Hodek, Petr (referee) ; Szotáková, Barbora (referee)
Candida parapsilosis is an emerging human opportunistic pathogen causing a wide spectrum of potentially life-threatening infections in immunocompromised hosts. One of the most important virulence factors of Candida spp. is a production of secreted aspartic proteinases (Saps). Presented thesis is mainly focused on the study of secreted aspartic proteinase 1 (Sapp1p) of C. parapsilosis, its processing and secretion under variable conditions and by use of various experimental models. Sapp1p is secreted by C. parapsilosis cells into the extracellular space as a completely processed and fully active enzyme. Experiments studying the C. parapsilosis cell wall (CW) confirmed the prolonged presence of completely processed Sapp1p on the cell surface (CW- Sapp1p). Proteolytic activity assay performed with the intact cells showed that CW-Sapp1p is proteolytically active prior to its release into the extracellular space and is capable of substrate cleavage. Biotinylation experiments with consecutive MS analysis revealed that CW-Sapp1p biotinylation is incomplete but saturable process, leaving partially unlabelled molecules. The accessibility of individual lysine residues in the Sapp1p molecule varied, with exception of four residues that were labelled in all of our experiments performed. The final step of...
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