Molecular characterization of a novel polymycovirus from the phytopathogenic fungus Setosphaeria turcica.
Arch Virol
; 166(8): 2315-2319, 2021 Aug.
Article
em En
| MEDLINE
| ID: mdl-34028604
ABSTRACT
A putative polymycovirus tentatively named "Setosphaeria turcica polymycovirus 1" (StPmV1) was discovered in the phytopathogenic fungus Setosphaeria turcica. StPmV1 has a genome comprising five double-stranded RNAs (dsRNAs). dsRNA1, 2, and 3 each encode a protein sharing significant similarity but lower than 64% sequence identity to the corresponding proteins of other polymycoviruses. dsRNA4 and 5 each encode a protein with a sequence that is not conserved among polymycoviruses. However, the protein encoded by dsRNA4 is rich in proline (P), alanine (A), and serine (S) residues, which is a feature shared by the so-called PAS-rich proteins encoded by all polymycoviruses. Phylogeny reconstruction using the RNA-dependent RNA polymerase (RdRp) sequences of accepted or putative polymycoviruses revealed that StPmV1 is most closely related to Plasmopara viticola lesion associated polymycovirus 1 (PvaPolymyco1), a putative polymycovirus recovered from the phytopathogenic oomycetes Plasmopara viticola. These data suggest that StPmV1 may represent a novel species of the genus Polymycovirus, family Polymycoviridae. To our knowledge, this is the first polymycovirus reported from S. turcica.
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Base de dados:
MEDLINE
Assunto principal:
Ascomicetos
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RNA de Cadeia Dupla
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Micovírus
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Sequenciamento Completo do Genoma
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article