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Roniviridae

This chapter focuses on Roniviridae family whose sole member genus is Okavirus. The virions are enveloped and bacilliform in shape with rounded ends, where the envelope is studded with prominent peplomers projecting approximately 11 nm from the surface. The nucleocapsids are 20–30 nm in diameter and...

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Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7150143/
http://dx.doi.org/10.1016/B978-0-12-384684-6.00069-0
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description This chapter focuses on Roniviridae family whose sole member genus is Okavirus. The virions are enveloped and bacilliform in shape with rounded ends, where the envelope is studded with prominent peplomers projecting approximately 11 nm from the surface. The nucleocapsids are 20–30 nm in diameter and have a helical symmetry with coil periodicity of 5–7 nm. Long filamentous nucleocapsid precursors occur in the cytoplasm of infected cells and acquire envelopes by budding at endoplasmic reticulum membranes. The virions are sensitive to calcium hypochlorite and sodium dodecyl-sulfate, but sensitivity to other treatments is not known. The virions possess a lipid envelope derived from endoplasmic membranes of host cells. Compared to the genomes of vertebrate nidoviruses, the okavirus genome is unique in that the nucleoprotein gene (ORF2) is located upstream of the glycoprotein gene (ORF3), there is no discrete gene encoding a structural membrane (M) protein, and the virion envelope glycoproteins gp116 and gp64 are generated by proteolysis of a pp3 precursor polyprotein encoded by the ORF3 gene. Okaviruses have been detected only in crustaceans and their geographic range mirrors that of its primary penaeid host, extending across the Indo-Pacific from Eastern Africa, Southern and Southeast Asia, and Australia to islands in the South Pacific. Infections have also been detected recently in blue shrimp (P. stylirostris) from the Gulf of California, and they may be chronic or acute and transmitted horizontally or vertically.
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spelling pubmed-71501432020-04-13 Roniviridae Virus Taxonomy Article This chapter focuses on Roniviridae family whose sole member genus is Okavirus. The virions are enveloped and bacilliform in shape with rounded ends, where the envelope is studded with prominent peplomers projecting approximately 11 nm from the surface. The nucleocapsids are 20–30 nm in diameter and have a helical symmetry with coil periodicity of 5–7 nm. Long filamentous nucleocapsid precursors occur in the cytoplasm of infected cells and acquire envelopes by budding at endoplasmic reticulum membranes. The virions are sensitive to calcium hypochlorite and sodium dodecyl-sulfate, but sensitivity to other treatments is not known. The virions possess a lipid envelope derived from endoplasmic membranes of host cells. Compared to the genomes of vertebrate nidoviruses, the okavirus genome is unique in that the nucleoprotein gene (ORF2) is located upstream of the glycoprotein gene (ORF3), there is no discrete gene encoding a structural membrane (M) protein, and the virion envelope glycoproteins gp116 and gp64 are generated by proteolysis of a pp3 precursor polyprotein encoded by the ORF3 gene. Okaviruses have been detected only in crustaceans and their geographic range mirrors that of its primary penaeid host, extending across the Indo-Pacific from Eastern Africa, Southern and Southeast Asia, and Australia to islands in the South Pacific. Infections have also been detected recently in blue shrimp (P. stylirostris) from the Gulf of California, and they may be chronic or acute and transmitted horizontally or vertically. 2012 2011-11-23 /pmc/articles/PMC7150143/ http://dx.doi.org/10.1016/B978-0-12-384684-6.00069-0 Text en © 2012 International Committee on Taxonomy of Viruses Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Roniviridae
title Roniviridae
title_full Roniviridae
title_fullStr Roniviridae
title_full_unstemmed Roniviridae
title_short Roniviridae
title_sort roniviridae
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7150143/
http://dx.doi.org/10.1016/B978-0-12-384684-6.00069-0