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Chloroviruses

Chloroviruses are large dsDNA, plaque-forming viruses that infect certain chlorella-like green algae; the algae are normally mutualistic endosymbionts of protists and metazoans and are often referred to as zoochlorellae. The viruses are ubiquitous in inland aqueous environments throughout the world...

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Autores principales: Van Etten, James L., Agarkova, Irina V., Dunigan, David D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019647/
https://www.ncbi.nlm.nih.gov/pubmed/31878033
http://dx.doi.org/10.3390/v12010020
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author Van Etten, James L.
Agarkova, Irina V.
Dunigan, David D.
author_facet Van Etten, James L.
Agarkova, Irina V.
Dunigan, David D.
author_sort Van Etten, James L.
collection PubMed
description Chloroviruses are large dsDNA, plaque-forming viruses that infect certain chlorella-like green algae; the algae are normally mutualistic endosymbionts of protists and metazoans and are often referred to as zoochlorellae. The viruses are ubiquitous in inland aqueous environments throughout the world and occasionally single types reach titers of thousands of plaque-forming units per ml of native water. The viruses are icosahedral in shape with a spike structure located at one of the vertices. They contain an internal membrane that is required for infectivity. The viral genomes are 290 to 370 kb in size, which encode up to 16 tRNAs and 330 to ~415 proteins, including many not previously seen in viruses. Examples include genes encoding DNA restriction and modification enzymes, hyaluronan and chitin biosynthetic enzymes, polyamine biosynthetic enzymes, ion channel and transport proteins, and enzymes involved in the glycan synthesis of the virus major capsid glycoproteins. The proteins encoded by many of these viruses are often the smallest or among the smallest proteins of their class. Consequently, some of the viral proteins are the subject of intensive biochemical and structural investigation.
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spelling pubmed-70196472020-03-09 Chloroviruses Van Etten, James L. Agarkova, Irina V. Dunigan, David D. Viruses Review Chloroviruses are large dsDNA, plaque-forming viruses that infect certain chlorella-like green algae; the algae are normally mutualistic endosymbionts of protists and metazoans and are often referred to as zoochlorellae. The viruses are ubiquitous in inland aqueous environments throughout the world and occasionally single types reach titers of thousands of plaque-forming units per ml of native water. The viruses are icosahedral in shape with a spike structure located at one of the vertices. They contain an internal membrane that is required for infectivity. The viral genomes are 290 to 370 kb in size, which encode up to 16 tRNAs and 330 to ~415 proteins, including many not previously seen in viruses. Examples include genes encoding DNA restriction and modification enzymes, hyaluronan and chitin biosynthetic enzymes, polyamine biosynthetic enzymes, ion channel and transport proteins, and enzymes involved in the glycan synthesis of the virus major capsid glycoproteins. The proteins encoded by many of these viruses are often the smallest or among the smallest proteins of their class. Consequently, some of the viral proteins are the subject of intensive biochemical and structural investigation. MDPI 2019-12-23 /pmc/articles/PMC7019647/ /pubmed/31878033 http://dx.doi.org/10.3390/v12010020 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Van Etten, James L.
Agarkova, Irina V.
Dunigan, David D.
Chloroviruses
title Chloroviruses
title_full Chloroviruses
title_fullStr Chloroviruses
title_full_unstemmed Chloroviruses
title_short Chloroviruses
title_sort chloroviruses
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019647/
https://www.ncbi.nlm.nih.gov/pubmed/31878033
http://dx.doi.org/10.3390/v12010020
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