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Updated: Jun 16, 2025
07:32
Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans
Published on: March 19, 2015
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The Cryptococcus neoformans STRIPAK complex controls genome stability, sexual development, and virulence
Patricia P Peterson1, Jin-Tae Choi2, Ci Fu3
1Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA.
Biorxiv : the Preprint Server for Biology
|August 16, 2024
Summary
The Cryptococcus neoformans STRIPAK complex is crucial for maintaining genome stability and regulating fungal growth, sexual development, and virulence. Mutations disrupt these processes, impacting pathogen fitness and host interaction.
Area of Science:
- Molecular and Cellular Biology
- Mycology
- Genetics
Background:
- The eukaryotic serine/threonine protein phosphatase PP2A is a heterotrimeric enzyme.
- The B' subunit (striatin) interacts with the striatin-interacting phosphatase and kinase (STRIPAK) complex.
- Orthologs of STRIPAK components exist in Cryptococcus neoformans.
Purpose of the Study:
- To functionally characterize STRIPAK components Pph22, Far8, and Mob3 in Cryptococcus neoformans.
- To investigate the role of the C. neoformans STRIPAK complex in genome stability, growth, and virulence.
Main Methods:
- Whole-genome sequencing to identify mutations in STRIPAK subunits.
- Functional characterization of deletion mutants (pph22Δ, far8Δ, mob3Δ).
- Analysis of haploinsufficiency, growth defects, sexual differentiation, and virulence in a murine model.
Main Results:
- Mutations in STRIPAK subunits lead to increased aneuploidy, indicating a role in genome stability.
- STRIPAK components are essential for hyphal growth, sporulation, mating, and sexual differentiation.
- Loss of PPH22 or FAR8 impairs growth, thermotolerance, and virulence, while mob3Δ enhances thermotolerance, capsule production, melanization, and hypervirulence.
Conclusions:
- The C. neoformans STRIPAK complex is vital for genome stability, vegetative growth, and sexual development.
- STRIPAK components differentially regulate virulence and environmental adaptation in C. neoformans.
- Understanding STRIPAK function provides insights into fungal pathogenesis and potential therapeutic targets.
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