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Related Experiment Videos

Extensive allelic variation in Cryptococcus neoformans.

A Casadevall1, L F Freundlich, L Marsh

  • 1Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461.

Journal of Clinical Microbiology
|May 1, 1992
PubMed
Summary
This summary is machine-generated.

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Cryptococcus neoformans var. neoformans strains exhibit significant genetic diversity in the orotidine monophosphate pyrophosphorylase (OMPPase) gene. This allelic variation in the URA5 gene provides valuable markers for studying fungal population structure and disease.

Area of Science:

  • Microbiology
  • Genetics
  • Molecular Biology

Background:

  • Cryptococcus neoformans is an opportunistic fungal pathogen.
  • Understanding genetic diversity is crucial for epidemiology and pathogenesis studies.

Purpose of the Study:

  • To investigate the genetic polymorphism of the orotidine monophosphate pyrophosphorylase (OMPPase) gene locus (URA5) in Cryptococcus neoformans var. neoformans.
  • To assess the genomic diversity among clinical isolates.

Main Methods:

  • Restriction fragment length polymorphism (RFLP) analysis.
  • Nucleotide sequence analysis of the URA5 gene locus.

Main Results:

  • The OMPPase (URA5) locus is highly polymorphic, with at least six identified alleles.

Related Experiment Videos

  • Nucleotide sequences varied by up to 5%, with most polymorphisms being silent mutations.
  • Strong selection against amino acid changes in OMPPase was inferred.

    • Conclusions:

    • Significant genomic diversity exists among C. neoformans clinical isolates.
    • The identified alleles of the URA5 gene are potential markers for population structure, epidemiology, and pathogenesis research.