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Vacuolar protein sorting-associated protein Vps17 regulates sexual reproduction and virulence of Cryptococcus

Meng-Ru Guo1, Jie-Shu Guo1, Jun-Ming Chen1

  • 1State Key Laboratory of Resource Insects, Medical Research Institute, Southwest University, Chongqing, China.

Mycology
|December 3, 2025
PubMed

Insights

The vacuolar protein Vps17 is crucial for Cryptococcus neoformans

Area of Science:

  • Mycology
  • Molecular Biology
  • Pathogenesis

Background:

  • Cryptococcus neoformans is an opportunistic fungal pathogen causing meningitis.
  • Vps17 is a vacuolar protein sorting-associated protein and a Retromer complex component.
  • Vps17 contains PX and BAR domains, characteristic of SNX proteins.

Purpose of the Study:

  • To investigate the role of Vps17 in Cryptococcus neoformans.
  • To understand Vps17's function in fungal cell integrity, reproduction, and virulence.

Main Methods:

  • Sequence analysis of Vps17.
  • Gene expression and protein localization studies.
  • Vps17 deletion mutant construction and phenotypic analysis.
  • Virulence assessment in a murine infection model.

Main Results:

  • VPS17 gene is active throughout C. neoformans development; Vps17 localizes on vesicles.
  • Vps17 deletion resulted in reduced capsule size, increased stress sensitivity, and impaired sexual reproduction (basidiospore formation, meiosis).
  • vps17Δ mutant showed significantly reduced virulence in a murine model.

Conclusions:

  • Vps17 is essential for maintaining cell membrane integrity and regulating sexual reproduction in C. neoformans.
  • Vps17 plays a significant role in fungal pathogenicity.
  • Vps17 influences the expression of genes involved in sexual reproduction and virulence.
Keywords:
Cryptococcus neoformansVps17retromer complexsexual reproductionvirulence

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