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''Alvernaviridae'' is a family of non-enveloped
positive-strand RNA virus Positive-strand RNA viruses (+ssRNA viruses) are a group of related viruses that have Sense (molecular biology), positive-sense, single-stranded genomes made of ribonucleic acid. The positive-sense genome can act as messenger RNA (mRNA) and can ...
es. Dinoflagellates serve as natural hosts. There is one genus in this family, ''Dinornavirus'', which contains one species: ''Heterocapsa circularisquama RNA virus 01''. Diseases associated with this family include host population control, possibly through
lysis Lysis ( ; from Greek 'loosening') is the breaking down of the membrane of a cell, often by viral, enzymic, or osmotic (that is, "lytic" ) mechanisms that compromise its integrity. A fluid containing the contents of lysed cells is called a ...
of the host cell.


Structure

Viruses in ''Alvernaviridae'' are non-enveloped, with icosahedral and spherical geometries, and T=3
symmetry Symmetry () in everyday life refers to a sense of harmonious and beautiful proportion and balance. In mathematics, the term has a more precise definition and is usually used to refer to an object that is Invariant (mathematics), invariant und ...
. The diameter is around 34 nm.


Genome

Genomes A genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding genes, other functional regions of the genome such as ...
are linear and non-segmented, around 4.4kb in length.


Life cycle

Viral replication is
cytoplasm The cytoplasm describes all the material within a eukaryotic or prokaryotic cell, enclosed by the cell membrane, including the organelles and excluding the nucleus in eukaryotic cells. The material inside the nucleus of a eukaryotic cell a ...
ic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive-strand RNA virus replication model in the cytoplasm. Positive-strand RNA virus transcription is the method of transcription. The virus is assembled in the cytoplasm. Dinoflagellates serve as the natural host.


References


External links


Viralzone: Alvernaviridae

ICTV
{{Taxonbar, from=Q18810538 Virus families Riboviria