Bodo saltans virus, an abundant giant aquatic Mimivirus

The discovery of Mimivirus in a French cooling tower amazed virologists and changed our view of the biology and evolution of giant viruses. Since then, many other giant viruses have been identified, and with three exceptions, they all appear to infect species of Acanthamoeba. Now a new member of the Mimivirus family has been discovered …

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A viral nucleus

A unique feature of eukaryotic cells, which distinguishes them from bacteria, is the presence of a membrane-bound nucleus that contains the chromosomal DNA (illustrated; image credit). Surprisingly, a nucleus-like structure that forms during viral infection of bacteria is the site of viral DNA replication (link to paper). During infection of Pseudomonas bacteria with the phage 2O1phi2-1, a …

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Eukaryotic genes in a bacteriophage

Viruses are tidily categorized into three groups according to the hosts they infect – bacteriophages, eukaryotic viruses, and archaeal viruses. Viruses do not infect hosts in another domain of life, and therefore lateral gene transfer is limited (giant DNA viruses might be exceptions). Now there is evidence for lateral gene transfer between eukaryotes and bacteriophages. Proof …

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