Mastrevirus

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Mastrevirus
Virus classification OOjs UI icon edit-ltr.svg
(unranked): Virus
Realm: Monodnaviria
Kingdom: Shotokuvirae
Phylum: Cressdnaviricota
Class: Repensiviricetes
Order: Geplafuvirales
Family: Geminiviridae
Genus:Mastrevirus
Maize streak virus. Picture taken by Kassie Kasdorf, presently at Plant Protection Research Institute, Pretoria, for the University of Cape Town. Good msv 3.jpg
Maize streak virus. Picture taken by Kassie Kasdorf, presently at Plant Protection Research Institute, Pretoria, for the University of Cape Town.

Mastrevirus is a genus of ssDNA viruses, in the family Geminiviridae . Mostly monocotyledonous plants serve as natural hosts. They are vectored by planthoppers. There are 50 species in this genus. Diseases associated with this genus include: maize streak virus: maize streak disease (MSD). [1] [2]

Contents

Capsid proteins

Mastreviruses have an unusually diverse range of capsid proteins among the Geminiviridae. While all other genera have species with essentially identical proteins (and their producing genetic sequences) among themselves, Mastrevirus has seven protein clusters and three species that each constitute their own. [3]

Structure

Viruses in Mastrevirus are non-enveloped, with icosahedral geometries, and T=1 symmetry. The diameter is around 22 nm, with a length of 38 nm. Genomes are circular and non-segmented, around 2.6-2.8kb in length. [1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
MastrevirusTwinned IcosahedralIncomplete T=1Non-envelopedCircularMonopartite

Life cycle

Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription is the method of transcription. The virus exits the host cell by nuclear pore export, and tubule-guided viral movement. Mostly monocotyledonous plants serve as the natural host. The virus is transmitted via a vector (leafhopper). Transmission routes are vector and mechanical. [1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
MastrevirusDicotsNoneViral movement; mechanical inoculationBuddingNucleusNucleusLeafhopper

Taxonomy

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species: [2] [4]

References

  1. 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. 1 2 "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 27 March 2025.
  3. ↑ Lefeuvre, Pierre; Martin, Darren P.; Elena, Santiago F.; Shepherd, Dionne N.; Roumagnac, Philippe; Varsani, Arvind (16 July 2019). "Evolution and ecology of plant viruses". Nature Reviews Microbiology . 17 (10). Nature Research: 632–644. doi:10.1038/s41579-019-0232-3. ISSN   1740-1526. S2CID   197402034. p. 638: Note that one of the geminivirus genera, Mastrevirus, has viruses with capsid proteins so diverse that they fall into seven distinct clusters and three singletons, whereas capsid protein sequences from the other genera all fall within individual clusters. ACSV, Axonopus compressus streak virus; CaCDaV, Camellia chlorotic dwarf-associated virus; CCDaV, Camellia citrus chlorotic dwarf-associated virus; DfasMV, dragonfly-associated mastrevirus; EMSV, Eragrostis minor streak virus; GraGV, grapevine geminivirus; JmaV, Juncus maritimus-associated virus; LaaV, Limeum africanum-associated virus; MCaV, mulberry crinkle-associated virus; MiSV, Miscanthus streak virus; MSMV, maize streak Reunion virus; PCMoV, passion fruit chlorotic mottle virus; PgaV, Polygala garcinii-associated virus; RLV1, rice latent virus 1; RLV2, rice latent virus 2; SMaV, switchgrass mosaic-associated virus; SpSMV1, sweetpotato symptomless mastrevirus 1; SSMV1, Sporobolus striate mosaic virus 1; SSMV2, Sporobolus striate mosaic virus 2; SStV-A, sugarcane striate virus A; SStV-D, sugarcane striate virus D; SWSV, sugarcane white streak virus; TaGV, tomato associated geminivirus; ToALCV, tomato apical leaf curl virus.
  4. ↑ "Species List: Geminiviridae". International Committee on Taxonomy of Viruses. Retrieved 27 March 2025.
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