Notes on Genus: Mandarivirus
Type member: Indian citrus ringspot virus
The genus Mandarivirus
is one of the genera in the family Alphaflexiviridae
. In genome organisation and phylogenetic analysis its single member particularly resembles viruses in the genus Potexvirus
but the virions are longer, the coat protein is larger and there is an additional ORF6. It is named from mandarin (Citrus reticulata
), the host of the type species.
Virions filamentous, not enveloped, c.
650 nm long and 13 nm in diameter.
Monopartite, linear, single stranded, positive-sense RNA, c.
7600 nucleotides long. The 3' terminus has a poly(A) tract.
Genus Genomic Organization
There are a total of 6 open reading frames, probably translated by means of subgenomic RNAs.
Type Member Genomic Organization
There are a total of 6 open reading frames, probably translated by means of subgenomic RNAs:
| 1 ||187 kDa ||Polymerase|
|2 ||25 kDa ||ORFs 2-4 (Triple gene block): |
translated from different reading frames
and all involved in cell-to-cell movement
|3 ||12 kDa|
|4 ||6 kDa|
|5 ||36 kDa||Coat protein |
|6 ||25 kDa||Nucleic acid binding protein (NABP) |