NDLI: Secretion of proteolytic enzymes by three phytopathogenic microorganisms

Content Provider	Springer Nature Link
Author	Kudryavtseva, N. N. Sofyin, A. V. Revina, T. A. Gvozdeva, E. L. Ievleva, E. V. Valueva, T. A.
Copyright Year	2013
Abstract	Serine proteinases from three phytopathogenic microorganisms that belong to different fungal families and cause diseases in potatoes were studied and characterized. The oomycete Phytophthora infestans (Mont.) de Bary and the fungi Rhizoctonia solani and Fusarium culmorum were shown to secrete serine proteinases. An analysis of the substrate specificity of these enzymes and their sensitivity to synthetic and protein inhibitors allowed us to refer them to trypsin- and subtilisin-like proteinases. The correlation between the trypsin- and subtilisin-like proteinases depended on the composition of the culture medium, particularly on the form of the nitrogen source. A phylogenetic analysis was carried out. In contrast to basidiomycetes R. solani, ascomycetes F. culmorum and oomycetes P. infestans produced a similar set of exoproteinases, although they had more distant phylogenetic positions. This indicated that the secretion of serine proteinases by various phytopathogenic microorganisms also depended on their phylogenetic position. These results allowed us to suggest that exoproteinases from phytopathogenic fungi play a different role in pathogenesis. They may promote the adaptation of fungi if the range of hosts is enlarged. On the other hand, they may play an important role in the survival of microorganisms in hostile environements outside their hosts.
Starting Page	514
Ending Page	520
Page Count	7
File Format	PDF
ISSN	00036838
Journal	Applied Biochemistry and Microbiology
Volume Number	49
Issue Number	5
e-ISSN	16083024
Language	English
Publisher	Springer US
Publisher Date	2013-09-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Microbiology Medical Microbiology
Content Type	Text
Resource Type	Article
Subject	Biochemistry Applied Microbiology and Biotechnology

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