Related Experiment Video

Updated: Jul 16, 2026

Determination of the Mating Efficiency of Haploids in Saccharomyces cerevisiae
05:39

Determination of the Mating Efficiency of Haploids in Saccharomyces cerevisiae

Published on: December 2, 2022

The MAT1 locus of Histoplasma capsulatum is responsive in a mating type-specific manner

Meggan Bubnick1, A George Smulian

  • 1Department of Pathology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267-0560, USA.

Eukaryotic Cell
|February 27, 2007
PubMed

Insights

Researchers identified the mating type locus (MAT) in Histoplasma capsulatum, a pathogenic fungus. This discovery aids in understanding fungal mating and potential virulence changes in new strains.

Area of Science:

  • Mycology
  • Genetics
  • Pathogen Biology

Background:

  • Histoplasma capsulatum is a pathogenic fungus with known mating types (+ and -).
  • Sexual reproduction in pathogens can lead to new strains with altered virulence.
  • Understanding mating mechanisms is crucial for studying pathogen evolution.

Purpose of the Study:

  • To identify and characterize the mating type (MAT) locus in Histoplasma capsulatum.
  • To develop tools for molecular studies of mating in this fungus.
  • To investigate the role of the MAT locus in mating compatibility and gene regulation.

Main Methods:

  • Syntenic analysis of genomic sequence databases to identify MAT idiomorph regions (MAT1-1 and MAT1-2).
  • Development of a mating type-specific PCR assay.
  • Genotyping of clinical isolates and a known mating type strain.
  • Assessment of mating compatibility and mating-type-dependent gene regulation.

Main Results:

  • Identified MAT1-1 and MAT1-2 idiomorph regions in different H. capsulatum strains.
  • Developed a PCR assay to distinguish mating types.
  • Identified two clinical isolates (UH1 and VA1) of opposite genotypic mating types.
  • Confirmed mating compatibility between UH1 and VA1.
  • Observed mating-type-dependent regulation of MAT transcription factors.

Conclusions:

  • The identified MAT1 locus plays a role in determining mating type in Histoplasma capsulatum.
  • This research provides a foundation for further molecular studies on mating and its implications for virulence.
  • The developed tools facilitate the identification and study of mating-competent strains.

More Related Videos

CRISPR-Cas9-Mediated Genome Editing in the Filamentous Ascomycete Huntiella omanensis07:25

CRISPR-Cas9-Mediated Genome Editing in the Filamentous Ascomycete Huntiella omanensis

Published on: June 9, 2020

Microscopy of Fission Yeast Sexual Lifecycle07:47

Microscopy of Fission Yeast Sexual Lifecycle

Published on: March 9, 2016

Related Concept Videos

Yeast Signaling01:28

Yeast Signaling

Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
Heterochromatin02:38

Heterochromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...