Embecovirus
Embecovirus is a subgenus of coronaviruses in the genus Betacoronavirus. The viruses in this subgenus, unlike other coronaviruses, have a hemagglutinin esterase gene. The viruses in the subgenus were previously known as group 2a coronaviruses.
Taxonomy
The subgenus contains the following species, listed by scientific name and followed by the exemplar virus of the species:Betacoronavirus gravedinis, Human coronavirus OC43Betacoronavirus hongkongense, Human coronavirus HKU1Betacoronavirus muris, Murine hepatitis virusBetacoronavirus myodae, Myodes rufocanus vole coronavirus 2/JL2014Betacoronavirus ratti, Betacoronavirus HKU24
Structure
The viruses of this subgenus, like other coronaviruses, have a lipid bilayer envelope in which the membrane, envelope and spike (S) structural proteins are anchored. Unlike other coronaviruses, viruses in this subgenus also have an additional shorter spike-like structural protein called hemagglutinin esterase.
Recombination
Genetic recombination can occur when two or more viral genomes are present in the same host cell. The dromedary camel beta-coronavirus exhibits genetic diversity in the African camel population. Contributing to this diversity are several recombination events that had taken place in the past between closely related Beta-CoVs of the subgenus Embecovirus.