Prymnesiovirus

Prymnesiovirus is a genus of viruses, in the family Phycodnaviridae. Alga serve as natural hosts. There is only one species in this genus: Chrysochromulina brevifilum virus PW1 (CbV-PW1, Prymnesiovirus brevifilum). It infects Haptolina brevifila, basionym: Chrysochromulina brevifilum (Edvardsen et al., 2011).^[1][2][3][4]

Prymnesiovirus
Virus classification
(unranked):	Virus
Realm:	Varidnaviria
Kingdom:	Bamfordvirae
Phylum:	Nucleocytoviricota
Class:	Megaviricetes
Order:	Algavirales
Family:	Phycodnaviridae
Genus:	Prymnesiovirus

Structure

Schematic drawing of a typical Phycodnaviridae virion (cross section and side view)

Viruses in Prymnesiovirus are enveloped, with icosahedral and round geometries, and T=169 symmetry. The diameter is around 100-170 nm. Genomes are linear, around 120-485kb in length.^[1]

Genus	Structure	Symmetry	Capsid	Genomic arrangement	Genomic segmentation
Prymnesiovirus	Icosahedral	T=169	Enveloped	Linear	Monopartite

Life cycle

Viral replication is nucleo-cytoplasmic. Replication follows the DNA strand displacement model. DNA-templated transcription is the method of transcription. The virus exits the host cell by lysis via lytic phospholipids. Alga serve as the natural host. Transmission routes are passive diffusion.^[1]

Genus	Host details	Tissue tropism	Entry details	Release details	Replication site	Assembly site	Transmission
Prymnesiovirus	Alga	None	Cell receptor endocytosis	Lysis	Nucleus	Cytoplasm	Passive diffusion