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Related Concept Videos

In-vitro Mutagenesis01:16

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
In vitro Mutagenesis01:16

In vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

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Gene-targeted Random Mutagenesis to Select Heterochromatin-destabilizing Proteasome Mutants in Fission Yeast
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Reverse genetics through random mutagenesis in Histoplasma capsulatum.

Brian H Youseff1, Julie A Dougherty, Chad A Rappleye

  • 1Departments of Microbiology and Internal Medicine, The Center for Microbial Interface Biology, Ohio State University, Columbus, OH 43210, USA. youseff.1@osu.edu

BMC Microbiology
|November 19, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a new reverse genetics method to efficiently create gene mutations in Histoplasma capsulatum. This breakthrough aids in understanding fungal pathogens and developing new treatments.

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Area of Science:

  • Mycology
  • Pathogen Biology
  • Molecular Genetics

Background:

  • Histoplasma capsulatum is a dimorphic fungus causing disease in mammals.
  • Understanding its biology and pathogenesis is limited by a lack of gene mutation tools.

Purpose of the Study:

  • To develop and validate a novel reverse genetics methodology for Histoplasma capsulatum.
  • To overcome limitations of existing gene knockout techniques in this fungal pathogen.

Main Methods:

  • Agrobacterium-mediated transformation with random mutagenesis.
  • Screening techniques including PCR-addressing for targeted gene disruption.
  • Optimization of cryopreservation for mutant library banking.

Main Results:

  • Successful isolation of a cbp1 mutant in a recalcitrant Histoplasma strain.
  • Demonstration of a functional reverse genetics system for gene targeting.
  • Established cryopreservation protocols for mutant recovery.

Conclusions:

  • The new methodology significantly enhances the ability to isolate targeted gene mutants in Histoplasma.
  • This approach facilitates molecular genetic analysis of fungal biology and pathogenesis.
  • The technique is broadly applicable to other fungi, especially those with inefficient homologous recombination.