Mastrevirus


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.

Capsid proteins

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

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.
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. Transmission routes are vector and mechanical.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
MastrevirusDicots-Viral movement; mechanical inoculationBuddingNucleusNucleusLeafhopper

Taxonomy

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:Mastrevirus arietini, Chickpea chlorosis Australia virusMastrevirus avenae, Oat dwarf virusMastrevirus axonopi, Axonopus compressus streak virusMastrevirus bothriochloae, Bothriochloa barbinodis associated virusMastrevirus bourbonense, Maize streak Reunion virusMastrevirus brachypodiumprimi, Brachypodium phoenicoides associated virus 1Mastrevirus brachypodiumsecundi, Brachypodium phoenicoides associated virus 2Mastrevirus bromi, Bromus catharticus striate mosaic virusMastrevirus chloris, Chloris striate mosaic virusMastrevirus cicerosis, Chickpea chlorosis virusMastrevirus cicerparvi, Chickpea chlorotic dwarf virusMastrevirus ciliaris, Digitaria ciliaris striate mosaic virusMastrevirus didactylae, Digitaria didactyla striate mosaic virusMastrevirus digitariae, Digitaria streak virusMastrevirus dilatati, Paspalum dilatatum striate mosaic virusMastrevirus eleusinae, Eleusine indica associated virusMastrevirus eragrostis, Eragrostis streak virusMastrevirus eragrostisminoris, Eragrostis minor streak virusMastrevirus erythrodiplaxis, Dragonfly-associated mastrevirus virusMastrevirus flavaparvi, Chickpea yellow dwarf virusMastrevirus flavi, Chickpea yellows virusMastrevirus fulleri, Maize streak dwarfing virusMastrevirus hordei, Wheat dwarf virusMastrevirus ipomoeae, Sweet potato symptomless virus 1Mastrevirus melenis, Melenis repens associated virusMastrevirus miscanthi, Miscanthus streak virusMastrevirus nomiae, Nomiamastrel virusMastrevirus oryzaprimi, Rice latent virus 1Mastrevirus oryzasecundi, Rice latent virus 2Mastrevirus panici, Panicum streak virusMastrevirus paspali, Paspalum striate mosaic virusMastrevirus rubrumprimi, Chickpea redleaf virusMastrevirus rubrumsecundi, Chickpea redleaf virus 2Mastrevirus sacchari, Saccharum streak virusMastrevirus saccharofficinari, Sugarcane streak virusMastrevirus saccharumalbusvenae, Sugarcane white streak virusMastrevirus saccharumbourbonense, Sugarcane streak Reunion virusMastrevirus saccharumegyptense, Sugarcane streak Egypt virusMastrevirus saccharumpallidi, Sugarcane chlorotic streak virusMastrevirus saccharumstriati, Sugarcane striate virusMastrevirus sorghi, Sorghum arundinaceum associated virusMastrevirus sporoboprimi, Sporolobus striate mosaic virus 1Mastrevirus sporobosecundi, Sporolobus striate mosaic virus 2Mastrevirus storeyi, Maize streak virusMastrevirus striatis, Maize striate mosaic virusMastrevirus tabaci, Tobacco yellow dwarf virusMastrevirus tritici, Wheat dwarf India virusMastrevirus urochloae, Urochloa streak virusMastrevirus urochloareunionense, Urochloa decumbens associated virusMastrevirus virgati, Switchgrass mosaic-associated virus