Genus: Macluravirus


Genus: Macluravirus

Distinguishing features

Macluraviruses resemble members of the genus Potyvirus in their transmission by aphids but virions are slightly shorter. They form a distinct group in phylogenetic analyses and have different polyprotein consensus cleavage sites.

Virion

Morphology

Virions are flexuous filaments mostly 650–675 nm×13–16 nm.

Physicochemical and physical properties

Virion Sedimentation coefficient S20,w is 155–158S; density in CsCl is 1.31–1.33 g cm−3.

Nucleic acid

Virions contain one molecule of linear positive-sense, ssRNA of about 8.0 kb.

Proteins

Macluraviruses have a single coat (capsid) protein (CP) species of 33–34 kDa.

Genome organization and replication

The complete genome sequences of four different macluraviruses are available. The aa sequences of macluravirus CPs show limited (14–23%) identity with CP sequences of some aphid-transmitted potyviruses. Macluraviruses show significant aa sequence identity in portions of the replicase protein with viruses in other genera of the family Potyviridae. The macluraviruses seem to have a genome organization and replication strategy typical of viruses in the family Potyviridae (Figure 2.Potyviridae). 

Antigenicity

Moderately immunogenic. No serological relationships to members of the genus Potyvirus have been found except for a weak reaction between maclura mosaic virus and bean yellow mosaic virus.

Biology

Host range

Current information suggests that most viruses have a narrow host range, infecting species in up to nine host families.

Transmission

The viruses are transmitted by aphids in a non-persistent manner and experimentally by mechanical inoculation.

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
Alpinia mosaic virusAlpinia mosaic virusTWAF499025Partial genomeAlpMV
Artichoke latent virusartichoke latent virusFR37KP405232NC_026759Complete genomeArLV
Artichoke latent virusRanunculus latent virusRN128DQ152193RanLV
Broad-leafed dock virus Abroad-leafed dock virus Aab032KU053507Complete genomeBDVA
Cardamom mosaic viruscardamom mosaic virusKSMF622947Complete genomeCdMV
Chinese yam necrotic mosaic virusChinese yam necrotic mosaic virusPES3AB710145NC_018455Complete genomeCYNMV
Maclura mosaic virusMaclura mosaic virusUKU58771Partial genomeMacMV
Narcissus latent virusNarcissus latent virusNZDQ450199Partial genomeNLV
Yam chlorotic mosaic virusYam chlorotic mosaic virusYSKT724961Complete genomeYCMV

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

Derivation of names

Macluravirus: from the genus name of the host (Maclura) of members of the type species Maclura mosaic virus.

Related, unclassified viruses

Virus name

Accession number

Virus abbreviation

Large cardamom chirke virus

JN257715*

 LCCV

Virus names and virus abbreviations are not official ICTV designations.
* incomplete genome sequence