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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.
Virions are flexuous filaments mostly 650–675 nm×13–16 nm.
Virion Sedimentation coefficient S20,w is 155–158S; density in CsCl is 1.31–1.33 g cm−3.
Virions contain one molecule of linear positive sense, ssRNA. RNA is about 8.0 kb.
Macluraviruses have a single CP species of 33–34 kDa.
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).
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.
Current information suggests that most viruses have a narrow host range, infecting species in up to nine host families.
The viruses are transmitted by aphids in a non-persistent manner and experimentally by mechanical inoculation.
Maclura: the genus name of the host of the type species.
Large cardamom chirke virus
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