Pisuviricota

Pisuviricota-collage.png

Pisuviricota is a phylum of RNA viruses within the realm Riboviria. This phylum includes viruses that have a positive-sense single-stranded RNA genome. Members of Pisuviricota are known to infect a wide range of hosts, including plants, animals, and humans.

Taxonomy

The phylum Pisuviricota is divided into several classes, orders, families, and genera. The classification is based on the genetic and structural characteristics of the viruses.

Classes

• Stelpaviricetes
• Duplopiviricetes

Orders

• Picornavirales
• Nidovirales

Families

• Picornaviridae
• Coronaviridae
• Arteriviridae

Characteristics

Pisuviricota viruses possess a positive-sense single-stranded RNA genome. This type of genome allows the viral RNA to be directly translated by the host cell's ribosomes into viral proteins. The replication of these viruses occurs in the cytoplasm of the host cell.

Genome

The genome of Pisuviricota viruses is typically linear and ranges in size from approximately 7 to 30 kilobases. The genome encodes for various structural and non-structural proteins necessary for the virus's replication and assembly.

Structure

The virions of Pisuviricota viruses can be either enveloped or non-enveloped. The structure of the virion varies among different families within the phylum. For example, members of the family Coronaviridae have an enveloped virion with a characteristic crown-like appearance due to the presence of spike proteins.

Host Range

Pisuviricota viruses have a broad host range, infecting various species of plants, animals, and humans. Some notable viruses within this phylum include:

• Poliovirus (family Picornaviridae)
• SARS-CoV-2 (family Coronaviridae)

Diseases

Viruses within the Pisuviricota phylum are responsible for a variety of diseases in their hosts. For instance, Poliovirus causes poliomyelitis in humans, while SARS-CoV-2 is the causative agent of COVID-19.

Research and Importance

The study of Pisuviricota viruses is crucial for understanding viral evolution, pathogenesis, and the development of antiviral therapies. Research on these viruses has led to significant advancements in virology and molecular biology.

See Also

• RNA virus
• Riboviria
• Virus classification