Notes on Genus: Emaravirus
Type member: European mountain ash ringspot-associated virus
This genus was created to accommodate a virus with four ssRNA negative sense RNA components. Sequence data show that it is only very distantly related to other ssRNA- viruses, including members of the family Bunyaviridae
. The name is derived directly from the type member, E
In leaf sections, virus-like membrane-bound bodies of 80-100 nm in diameter, resembling particles from members of the genus Tospovirus
have been seen.
Four segments of negative sense ssRNA of approximately 7.0, 2.3, 1.6 and 1.4 kb.
Genus Genomic Organization
Four segments of ssRNA, each containing a single ORF translated from the complementary strand. There is an RNA polymerase encoded on the largest segment and the coat protein is translated from RNA3.
Type Member Genomic Organization
Each RNA encodes a single protein in the complementary (negative) sense:
|Segment||Size (nt)||Protein encoded|
|RNA1||7040||266 kDa RNA polymerase|
|RNA2||2335||75 kDa glycoprotein precursor|
|RNA3||1560||35 kDa coat protein|
|RNA4||1348||27 kDa (function unknown)|