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Updated: Jun 7, 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, United States of America.
Plos Pathogens
|November 19, 2024
Summary
The STRIPAK complex in Cryptococcus neoformans is crucial for maintaining genome stability and regulating fungal growth, sexual development, and virulence. Mutations disrupt these processes, impacting pathogen survival and infection.
Area of Science:
- Mycology
- Molecular Biology
- 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.
- STRIPAK complex orthologs were identified 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 STRIPAK complex in maintaining genome stability.
- To assess the impact of STRIPAK mutations on fungal growth, development, and virulence.
Main Methods:
- Whole-genome sequencing to identify mutations.
- Structural modeling and protein domain analysis.
- Functional characterization of deletion mutants (pph22Δ, far8Δ, mob3Δ).
Main Results:
- STRIPAK mutations lead to increased aneuploidy, indicating a role in genome stability.
- PPH22 is haploinsufficient, causing defects in growth and sporulation.
- Mutants exhibit impaired mating, sexual differentiation, and virulence.
- Mob3 deletion enhances thermotolerance, capsule production, melanization, and hypervirulence.
Conclusions:
- The C. neoformans STRIPAK complex is essential for genome stability, vegetative growth, and sexual development.
- STRIPAK components play distinct roles in fungal fitness and pathogenesis.
- The complex is a potential target for antifungal strategies.
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