Genus: Brambyvirus


Genus: Brambyvirus

Distinguishing features

The genus includes a single species, members of which are distinguished from all other members of the family in that they encode a very large P1 protein (83.6 k Da) containing an AlkB domain, and are also phylogenetically distinct (Susaimuthu et al., 2008).

Virion

Morphology

Virions are flexuous filaments 800×11–15 nm in size.

Nucleic acid

Virions contain a single molecule of linear, positive-sense ssRNA of about 11 kb.

Proteins

There is a single coat (capsid) protein of 40.9 kDa.

Genome organization and replication 

Apart from the size of the P1 coding region, the genome organization is identical to that of most monopartite viruses in the family Potyviridae (Figure 2.Potyviridae).

Antigenicity 

The virus could not be detected by a universal potyvirus monoclonal antibody but there are no additional data.

Biology

Host range

The virus has been reported only from wild and cultivated blackberry (Rubus sp.) where it is often symptomless but is also a component of a complex of viruses. It is not known to cause symptoms in any herbaceous test host.

Transmission

The virus is presumed to be transmitted by an aerial vector that has not yet been identified. 

Species demarcation criteria

See discussion under family description.

Member species 

SpeciesVirus name(s)Exemplar isolateExemplar accession numberExemplar RefSeq numberAvailable sequenceOther isolatesOther isolate accession numbersVirus abbreviationIsolate abbreviation
Blackberry virus Yblackberry virus YArk3AY994084NC_008558Complete genomeBlVY

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.

Derivation of names

Brambyvirus: from bramble, the host of blackberry virus Y, a member of the type species Blackberry virus Y