Notes on Genus: Eragrovirus
Type member: Eragrostis curvularia streak virus
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
|V1||+||29 kDa ||Coat protein|
|V2||+||10 kDa ||Movement protein|
|C1||-||42 kDa ||Replication initiation protein|
|C2||-||18 kDa ||Posssible transciption activator protein (TrAP)|