Notes on Genus: Mimoreovirus


Type member: Micromonas pusilla reovirus


General Description

This is one of the genera in the family Reoviridae. The only known member has 11 segments, the largest of which is much bigger that that of any other members of the family. It infects a photosynthetic marine protist, Micromonas, from which the genus name is derived.


Virions isometric (icosahedral), probably c.80 nm in diameter.


Linear, double stranded RNA in 11 segments. Each virion contains a single copy of the entire genome. Total genome c.25500 nucleotides long.

Genus Genomic Organization

Each segment has a single ORF.

Type Member Genomic Organization

  • Segment 1 (5792 nt) encodes a putative surface glycoprotein VP1 (201.3 kDa)
  • Segment 2 (4175 nt) encodes a putative viral polymerase VP2 (154.7 kDa)
  • Segment 3 (3129 nt) encodes the VP3 protein (116.2 kDa)
  • Segment 4 (2833 nt) encodes the VP4 protein (102.6 kDa)
  • Segment 5 (2027 nt) encodes the VP5 protein (53.2 kDa)
  • Segment 6 (1687 nt) encodes the VP6 protein (59.0 kDa)
  • Segment 7 (1556 nt) encodes the VP7 protein (55.4 kDa)
  • Segment 8 (1449 nt) encodes the VP8 protein (51.7 kDa)
  • Segment 9 (1296 nt) encodes the VP9 protein (44.3 kDa)
  • Segment 10 (878 nt) encodes the VP10 protein (24.7 kDa)
  • Segment 11 (741 nt) encodes the VP11 protein (22.2 kDa)