Isolation and characterization of a new type of chlorovirus that infects an endosymbiotic strain of the heliozoon Free

Abstract

A novel virus, named (ATCV), that infects endosymbiotic algae of the heliozoon was isolated from freshwater samples. Electron microscopic analysis of ATCV revealed that the viral capsid has a distinct icosahedral shape with a diameter of 140–190 nm. Filamentous structures extending from some of the virus vertices, which may aid attachment of the virus to host cells, were also observed. The capsid is made up of one major coat protein of about 50 kDa and contains a large dsDNA genome. ATCV is a member of the genus , which belongs to the family , a group of large, icosahedral, dsDNA-containing viruses that infect algae and are ubiquitous in natural environments. However, ATCV is clearly distinct from the prototype , (PBCV-1), in some aspects of its genome structure and gene content and therefore must be regarded as a member of a new group of viruses.

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2005-10-01
2024-03-29
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