Abstract
Viruses have long been viewed as entities relying on the host cell machinery to propagate. Blanc-Mathieu et al. (e02446-20) describe a novel giant alga-infecting virus with a unique structure, an atypical infection profile, and an unprecedented number of genes involved in energy metabolism (such as the tricarboxylic acid [TCA] cycle and the β-oxidation pathway). One of these genes (the succinate dehydrogenase subunit A gene) is transcribed during infection. Moreover, homologs of this gene seem to be widely present in viral genomes of the Tara Oceans data set. This discovery provides evidence that viruses which are able to directly modulate the energy metabolism of their hosts by using their own genetic repertoire are widespread in the global ocean.
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