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Study of oligandrin protein secreted by oomycete Pythium oligandrum
Neykulova, Anastasia ; Bělonožníková, Kateřina (advisor) ; Adámková, Lyubina (referee)
Oomycete Pythium oligandrum acts as a mycoparasite of pathogenic fungi, bacteria and oomycetes in soil due to the production of a number of hydrolytic enzymes for the degradation of polysaccharides and proteins in the cell wall of the host. At the same time, P. oligandrum can interact with plant roots through specific elicitors and stimulate plant defense and growth. Thus, P. oligandrum is a successfully used environmentally friendly biological control agent of plants. Among the secreted elicitors P. oligandrum to the low molecular weight proteins belong oligandrins (~10 kDa), which have a characteristic structure and a conserved sequence among the group of so-called elicitins, and at the same time are not homologous to plant proteins. In the framework of this bachelor thesis, was analyzed the production of oligandrin in various types of growing media after cultivation of P. oligandrum. The total proteolytic activity and the content of phenolic substances as other possible elicitors of plant defense reactions were also observed in culture media. Further, this work focused on the possibility of recombinant oligandrin expression in E. coli and its subsequent purification. Key words: Pythium oligandrum, oligandrin, elicitors, cultivation, recombinant expression [IN CZECH]
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