Notes on Genus: Turncurtovirus
Type member: Turnip curly top virus
This is one of 7 genera in the family Geminiviridae
. Its single member most closely resembles members of the genus Curtovirus
but it is phylogenetically distinct and the genome encodes 6 rather than 7 proteins.
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 2970 nucleotides long.
Genus Genomic Organization
There are two open reading frames (ORFs) in the positive (virion) sense and four in the negative (complementary) sense.
Type Member Genomic Organization
|V1||+||32 kDa ||Coat protein|
|V2||+||15 kDa ||Movement protein|
|C1||-||42 kDa ||Replication initiator protein|
|C2||-||16 kDa ||Transciption activator protein (TrAP)|
|C3||-||17 kDa ||Replication enhancer protein|
|C4||-||10 kDa ||Symptom determinant|