Isolation and partial characterization of a new reovirus in the Chinese mitten crab, Eriocheir sinensis H Milne Edwards

A second type of freshwater crab reovirus has been isolated from Chinese mitten crab, Eriocheir sinensis H. Milne Edwards, in China; we named it E. sinensis reovirus (EsRV816). The negatively stained virion is a non‐enveloped icosahedral particle, 60 ± 5 nm in diameter. Its genome is composed of 10...

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Bibliographic Details
Published in:Journal of fish diseases 2012-10, Vol.35 (10), p.733-739
Main Authors: Zhang, S, Bonami, J-R
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Animals
Brachyura - virology
China
Chinese mitten crab
crustacean reovirus
Cypovirus
Decapoda
Eriocheir sinensis
EsRV816
Fijivirus
Fresh Water
Freshwater
Genome, Viral
Microscopy, Electron, Transmission
Molecular Sequence Data
Nilaparvata lugens
Operophtera brumata
Reoviridae
Reoviridae - genetics
Reoviridae - isolation & purification
Reoviridae - physiology
Reoviridae - ultrastructure
Reovirus
Sequence Homology, Amino Acid
Viral Proteins - chemistry
Viral Proteins - genetics
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Summary:A second type of freshwater crab reovirus has been isolated from Chinese mitten crab, Eriocheir sinensis H. Milne Edwards, in China; we named it E. sinensis reovirus (EsRV816). The negatively stained virion is a non‐enveloped icosahedral particle, 60 ± 5 nm in diameter. Its genome is composed of 10 dsRNA linear pieces exhibiting an electrophoretic pattern of 5/3/2. The largest segment (RNA‐1) was cloned and sequenced. The deduced amino acid sequence, corresponding to the RdRp of the virus, showed 26% identity with the RdRp of Operophtera brumata (L.) cypovirus 19 in the genus Cypovirus and 24% identity with RdRp of Nilaparvata lugens (Stal) reovirus in the genus Fijivirus. On the basis of its ultrastructure and physicochemical properties, this virus is quite different from other crab reoviruses, and particularly with another freshwater crab reovirus EsRV905, recently classified in a new genus Cardoreovirus. This virus (EsRV816) possesses all the characters of the members of the reoviridae family and could represent a new genus.
ISSN:0140-7775
1365-2761
DOI:10.1111/j.1365-2761.2012.01398.x