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ICTV Virus Taxonomy Profile: Yadokariviridae 2023
Yukiyo Sato1,2, Subha Das3, Leonardo Velasco4
1Institute of Plant Science and Resources, Okayama University, Kurashiki 710-0046, Japan.
The Yadokariviridae family comprises unique capsidless RNA viruses that hijack capsids from double-stranded RNA viruses. These viruses replicate within these hijacked capsids, impacting their fungal hosts.
Area of Science:
- Virology
- Mycology
- Molecular Biology
Background:
- The family Yadokariviridae includes capsidless, non-segmented, positive-sense RNA viruses.
- These viruses are known to hijack capsids from phylogenetically distant double-stranded RNA (dsRNA) viruses.
Purpose of the Study:
- To summarize the International Committee on Taxonomy of Viruses (ICTV) report on the family Yadokariviridae.
- To elucidate the replication strategy and ecological impact of Yadokariviridae.
Main Methods:
- Phylogenetic analysis to determine viral lineage.
- Replication studies within hijacked heterocapsids.
- Assessment of host-virus interactions.
Main Results:
- Yadokariviridae possess their own RNA-directed RNA polymerase for replication inside hijacked dsRNA virus capsids.
- Despite their (+) RNA genome, their replication mimics dsRNA viruses.
- Yadokarivirids can exert positive or negative effects on host fungi.
Conclusions:
- The Yadokariviridae family represents a unique viral group with a novel replication strategy.
- Interactions between Yadokariviridae, their capsid donors, and host fungi are complex and ecologically significant.
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