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Genetic Manipulation of Cryptococcus neoformans.

Kwang-Woo Jung1, Kyung-Tae Lee2, Yee-Seul So2

  • 1Research Division for Biotechnology, Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea.

Current Protocols in Microbiology
|July 18, 2018
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Summary

This study details genetic manipulation techniques for Cryptococcus neoformans, a fungus causing severe infections. These methods aid in understanding fungal pathogenicity and developing new treatments for cryptococcal meningoencephalitis.

Keywords:
Cryptococcus neoformansbiolistic transformationconstitutive overexpressiondouble-joint PCRprotein-tagging system

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Area of Science:

  • Mycology
  • Medical Mycology
  • Molecular Biology

Background:

  • Cryptococcus neoformans is a significant opportunistic fungal pathogen responsible for over a million infections and 600,000 deaths globally each year.
  • It causes life-threatening meningoencephalitis, particularly in immunocompromised individuals.
  • Limited therapeutic options exist due to similarities between fungal and human cells, highlighting the need for better understanding of fungal pathogenicity.

Purpose of the Study:

  • To describe established protocols for genetic manipulation of Cryptococcus neoformans.
  • To facilitate the identification and functional characterization of genes involved in C. neoformans pathogenicity.
  • To advance research on mechanisms underlying fungal infections.

Main Methods:

  • Utilizing double-joint (DJ) PCR for constructing target gene deletion mutants.
  • Employing the histone H3 gene promoter for creating constitutive overexpression strains.
  • Developing protocols for epitope/fluorescence protein-tagged strains in C. neoformans.

Main Results:

  • Successfully established protocols for creating gene deletion mutants.
  • Demonstrated methods for generating constitutive overexpression strains.
  • Provided techniques for tagging C. neoformans strains with epitope or fluorescence proteins.

Conclusions:

  • Genetic manipulation is crucial for understanding C. neoformans pathogenicity.
  • These described protocols serve as a valuable resource for researchers studying this fungal pathogen.
  • Advances in genetic techniques enhance the utility of C. neoformans as a model system for pathogenic fungi.