Double-stranded RNA viruses in a mycocinogenic strain of Cystofilobasidium infirmominiatum

The viral particles (about 30 nm in diameter) that contain dsRNAs (2.0 and 6.3 kbp) encapsidated by a coat of protein were detected in a mycocin-secreting strain of Cystofilobasidium infirmominiatum isolated from plants in an oak forest (Moscow region). The mycocin with a molecular mass above 15 kDa...

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Bibliographic Details
Published in:FEMS yeast research 2003-03, Vol.3 (1), p.63-68
Main Authors: Golubev, Wladyslav I, Pfeiffer, Ilona, Churkina, Ludmila G, Golubeva, Ellen W
Format: Article
Language:English
Subjects:
Basidiomycota - drug effects
Basidiomycota - virology
Cystofilobasidium infirmominiatum
dsRNA mycovirus
Electrophoresis, Polyacrylamide Gel
Mycocinogeny
Mycotoxins - metabolism
RNA Viruses - genetics
RNA Viruses - isolation & purification
RNA, Double-Stranded - chemistry
RNA, Double-Stranded - isolation & purification
RNA, Viral - chemistry
RNA, Viral - isolation & purification
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Summary:The viral particles (about 30 nm in diameter) that contain dsRNAs (2.0 and 6.3 kbp) encapsidated by a coat of protein were detected in a mycocin-secreting strain of Cystofilobasidium infirmominiatum isolated from plants in an oak forest (Moscow region). The mycocin with a molecular mass above 15 kDa is fungicidal (maximum activity at pH 4.5) and active mainly against some species of the Cystofilobasidiales and Filobasidiales (‘Cryptococcus aerius’ clade). Curing by incubation at elevated temperature resulted in the concomitant loss of dsRNAs and mycocinogenic activity, and cured derivatives became sensitive to the mycocin produced by the parent strain.
ISSN:1567-1356
1567-1364
DOI:10.1016/S1567-1356(02)00165-4