Notes on Genus: Eragrovirus

twinned icosahedra
twinned icosahedra

Type member: Eragrostis curvularia streak virus


General Description

This is one of 7 genera in the family Geminiviridae. The single member is unusual in having a coat protein mostly closely related to members of the genus Mastrevirus but replication proteins that most nearly resemble members of the genus Begomovirus. There are only 4 ORFs and the origin of replication sequence is the unusual TAAGATTCC.


Virions are geminate (twinned) icosahedra, not enveloped, 38 nm long and 22 nm in diameter. 22 capsomeres per nucleocapsid.


Monopartite, closed circular, single stranded DNA, about 2750 nucleotides long.

Genus Genomic Organization

There are two open reading frames (ORFs) in the positive (virion) sense and (probably) two in the negative (complementary) sense.

Type Member Genomic Organization

ORFsense product
V1+29 kDa Coat protein
V2+10 kDa Movement protein
C1-42 kDa Replication initiation protein
C2-18 kDa Posssible transciption activator protein (TrAP)