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Updated: Sep 17, 2025
05:34
Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus
Published on: June 6, 2025
240
STRIPAK complex defects result in pseudosexual reproduction in Cryptococcus neoformans.
Patricia P Peterson1, Sarah Croog1, Yeseul Choi1
1Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America.
Plos Genetics
|June 30, 2025
Summary
The STRIPAK complex is crucial for sexual reproduction in Cryptococcus neoformans, regulating genome stability and inheritance. Disruptions lead to altered reproductive modes and impaired development.
Area of Science:
- Mycology
- Molecular Biology
- Genetics
Background:
- The STRIPAK complex is conserved across species and regulates cellular processes.
- In Cryptococcus neoformans, STRIPAK maintains genome stability and controls development.
- Sexual reproduction in C. neoformans is linked to virulence.
Purpose of the Study:
- Investigate the roles of STRIPAK subunits Pph22 and Far8 in C. neoformans sexual development.
- Determine how STRIPAK influences reproductive modes and genome inheritance.
Main Methods:
- Gene deletion mutants (pph22Δ, far8Δ) were created and analyzed.
- Sexual and pseudosexual reproduction assays were performed.
- Transcriptomic profiling was used to assess gene expression changes.
Main Results:
- pph22Δ mutants showed defects in sexual reproduction and favored pseudosexual reproduction.
- Overexpression of PPG1 rescued developmental defects and restored sexual reproduction.
- far8Δ mutants also exhibited high rates of pseudosexual reproduction.
- Transcriptomic analysis revealed dysregulation of genes involved in nuclear organization, DNA replication, and cell cycle.
Conclusions:
- STRIPAK complex, particularly Pph22 and Far8, plays a key role in modulating reproductive modes in C. neoformans.
- STRIPAK disruption impacts genome integrity and inheritance mechanisms.
- These findings have implications for fungal adaptation and pathogenesis.
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