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The origin of multiple B mating specificities in Coprinus cinereus
Meritxell Riquelme1, Michael P Challen, Lorna A Casselton
1Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom.
Genetics
|May 10, 2005
Summary
Researchers identified 14 new mushroom pheromone receptors and 29 pheromones in Coprinus cinereus. These findings reveal complex evolutionary processes shaping mating-type loci and potential insights into molecular interactions.
Area of Science:
- Mycology
- Genetics
- Molecular Biology
Background:
- Mushrooms like Coprinus cinereus have large families of pheromones and G-protein-coupled receptors.
- These are located at the B mating-type locus and determine mating types through complex pairings.
- This system offers insights into molecular interactions between pheromones and receptors.
Purpose of the Study:
- To identify additional members of pheromone and G-protein-coupled receptor gene families in Coprinus cinereus.
- To analyze the evolutionary relationships and specificities of these mating-related genes.
Main Methods:
- Molecular analysis of Coprinus cinereus strains collected globally.
- Identification of gene alleles within the B mating-type locus.
- Transformation analysis to determine the specificity of newly identified alleles.
Main Results:
- Discovered 70 potential B mating specificities from 14 receptors and 29 pheromones across three gene groups.
- Found that receptor grouping by sequence homology does not align with positional grouping at the B locus.
- Indicated complex evolutionary mechanisms shaped the B mating-type loci.
Conclusions:
- The study expands the known diversity of pheromone and receptor genes in Coprinus cinereus.
- The findings highlight the intricate evolutionary history of mating-type loci in fungi.
- The identified alleles provide a basis for understanding fungal mating specificity and molecular interactions.