Marine mimivirus relatives are probably large algal viruses.

Virology Journal
Adam MonierHiroyuki Ogata

Abstract

Acanthamoeba polyphaga mimivirus is the largest known ds-DNA virus and its 1.2 Mb-genome sequence has revealed many unique features. Mimivirus occupies an independent lineage among eukaryotic viruses and its known hosts include only species from the Acanthamoeba genus. The existence of mimivirus relatives was first suggested by the analysis of the Sargasso Sea metagenomic data. We now further demonstrate the presence of numerous "mimivirus-like" sequences using a larger marine metagenomic data set. We also show that the DNA polymerase sequences from three algal viruses (CeV01, PpV01, PoV01) infecting different marine algal species (Chrysochromulina ericina, Phaeocystis pouchetii, Pyramimonas orientalis) are very closely related to their homolog in mimivirus. Our results suggest that the numerous mimivirus-related sequences identified in marine environments are likely to originate from diverse large DNA viruses infecting phytoplankton. Micro-algae thus constitute a new category of potential hosts in which to look for new species of Mimiviridae.

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Apr 12, 2013·The ISME Journal·Pascal HingampHiroyuki Ogata
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Datasets Mentioned

BETA
ABU23716
ABU23718

Software Mentioned

PROTPARS
CAMERA
PhyML
MUSCLE
BLASTP
EMBOSS
PHYLIP
Phylogeny
getorf program

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