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Protein mapping and genome expression variations in the basidiomycete Agrocybe aegerita

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Summary

A procedure suitable for the extraction and mapping of total proteins from the basidiomycete, Agrocybe aegerita, was developed. A. aegerita mycelia were fragmented either with a Dangoumeau grinder, an X-press bomb or a sonicator and the efficiency of these three disruption methods were compared. The extraction buffer composition was optimized to avoid proteolytic activities. 2D-SDS-PAGE analysis of protein extracts showed that the rate of reproducibility depending on extractions and electrophoretic separations was always greater than 96% for all strains. The differences in efficiency observed between the breaking procedures indicate that the A. aegerita cell wall is more mechanically resistant than that of other basidiomycetes. The efficient action of protease inhibitors (PMSF and SDS) showed that A. aegerita mycelia contains numerous and/or highly active proteases. Reproducibility of protein extraction and separation methods allowed the establishment and the comparison of standard maps. Qualitative and quantitative variations in gene products between a wild dikaryotic strain and 11 homokaryotic strains from its progeny were examined. The genetic diversity, determined by comparing the distribution of proteic variations in 11 homokaryons from the same progeny, was comparable to that observed between co-isogenic homokaryons of another basidiomycete.

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Authors and Affiliations

  1. Laboratoire de Génétique Moléculaire et d'Amélioration des Champignons Cultivés, Université de Bordeaux II — INRA, CRA de Bordeaux, Domaine de la Grande Ferrade, F-33140, Pont-de-la-Maye, France

    J. C. Salvado & J. Labarère

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  1. J. C. Salvado
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  2. J. Labarère
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Communicated by H. F. Linskens

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Salvado, J.C., Labarère, J. Protein mapping and genome expression variations in the basidiomycete Agrocybe aegerita . Theoret. Appl. Genetics 78, 505–512 (1989). https://doi.org/10.1007/BF00290834

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  • DOI: https://doi.org/10.1007/BF00290834

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