Simplexvirus

Simplexvirus is a genus of viruses in the order Herpesvirales, in the family Herpesviridae, in the subfamily Alphaherpesvirinae. Humans and mammals serve as natural hosts. Diseases associated with this genus include skin vesicles or mucosal ulcers, rarely encephalitis, and meningitis.[1][2]

Simplexvirus
3D computer reconstruction of a Human alphaherpesvirus 1 capsid
Virus classification Edit this classification
(unranked): Virus
Realm: Duplodnaviria
Kingdom: Heunggongvirae
Phylum: Peploviricota
Class: Herviviricetes
Order: Herpesvirales
Family: Orthoherpesviridae
Subfamily: Alphaherpesvirinae
Genus: Simplexvirus
Species

See text

Species

The following 17 species are assigned to the genus in ICTV 2022:[2]

Structure

Viruses in Simplexvirus are enveloped, with icosahedral, spherical to pleomorphic, and round geometries, and T=16 symmetry. The diameter is around 150-200 nm. Genomes are linear and unsegmented, around 152kb in length.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
SimplexvirusSpherical pleomorphicT=16EnvelopedLinearMonopartite

Lifecycle

Viral replication is nuclear, and is lysogenic. Entry into the host cell is achieved by attachment of the viral gB, gC, gD, and gH proteins to host receptors, which mediates endocytosis. Replication follows the dsDNA bidirectional replication model. DNA-templated transcription, with some alternative splicing mechanism, is the method of transcription. Translation takes place by leaky scanning. The virus exits the host cell by nuclear egress, budding, and microtubular outwards viral transport. Human and mammals serve as the natural hosts. Transmission routes are sexual, contact, and saliva.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
SimplexvirusHumans; mammalsEpithelial mucosaCell receptor endocytosisBuddingNucleusNucleusSaliva

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. "Virus Taxonomy: 2022 Release". International Committee on Taxonomy of Viruses (ICTV). March 2023. Retrieved 16 September 2022.
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