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Discovery and Characterization of a Novel Bipartite Botrexvirus From the Phytopathogenic Fungus . | LitMetric

AI Article Synopsis

Article Abstract

In this study, we describe a novel positive, single-stranded (+ss) RNA mycovirus, named botrexvirus 1 (BdBV1), from a phytopathogenic fungus showing abnormal morphology and attenuated virulence. BdBV1 is phylogenetically related to Botrytis virus X (BotVX) and is the second potential member of the proposed genus in the family . However, it differs from the monopartite BotVX in that BdBV1 possesses a bipartite genome comprised of two ssRNA segments (RNA1 and RNA2 with lengths of 5,035 and 1,063 nt, respectively). BdBV1 RNA1 and RNA2 encode putative RNA-dependent RNA polymerase (RdRp) and coat protein (CP) genes, which share significant identity with corresponding genes in both fungal and plant viruses. Moreover, open reading frames (ORFs) 2-4 of BdBV1 RNA1 shared no detectable identity with any known viral proteins. Immunosorbent electron microscopy (ISEM) analysis using an antibody against the virus CP generated revealed that BdBV1 is encapsidated in filamentous particles. A comparison of the biological effects of BdBV1 infection on symptoms and growth in isogenic lines of virus-free and virus-infected revealed that BdBV1 is probably involved in reduced growth and virulence of the host fungus. This study describes and characterizes a novel bipartite botrexvirus, which is closely related to uni- and multi-partite fungal and plant viruses and contributes useful information to a better understanding of virus evolution.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8280476PMC
http://dx.doi.org/10.3389/fmicb.2021.696125DOI Listing

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