Spiromicrovirus

Spiromicrovirus is a genus of viruses, in the family Microviridae, in the subfamily Gokushovirinae. Spiroplasma bacteria serve as natural hosts. There is only one species in this genus: Spiromicrovirus SpV4.^[1][2]

Spiromicrovirus
Virus classification
(unranked):	Virus
Realm:	Monodnaviria
Kingdom:	Sangervirae
Phylum:	Phixviricota
Class:	Malgrandaviricetes
Order:	Petitvirales
Family:	Microviridae
Subfamily:	Gokushovirinae
Genus:	Spiromicrovirus

Structure

Viruses in Spiromicrovirus are non-enveloped, with icosahedral and round geometries, and T=1 symmetry. The diameter is around 30 nm. Genomes are circular, around 6.1kb in length.^[1]

Genus	Structure	Symmetry	Capsid	Genomic arrangement	Genomic segmentation
Spiromicrovirus	Icosahedral	T=1	Non-enveloped	Circular	Monopartite

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by pilus-mediated adsorption into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription is the method of transcription. The virus exits the host cell by bacteria lysis. Spiroplasma bacteria serve as the natural host.^[1]

Genus	Host details	Tissue tropism	Entry details	Release details	Replication site	Assembly site	Transmission
Spiromicrovirus	Bacteria: spiroplasma	None	Pilus adsorption	Lysis	Cytoplasm	Cytoplasm	Pilus