Virus classification e
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Tymovirales
Family: Gammaflexiviridae
Genus: Mycoflexivirus
Type species
Botrytis virus F

Gammaflexiviridae is a family of viruses in the order Tymovirales. Fungi serve as natural hosts. There are currently only one genus, Mycoflexivirus, and one species in this family: the type species Botrytis virus F.[1][2][3]


Group: ssRNA(+)

Order: Tymovirales



Viruses in Gammaflexiviridae are non-enveloped, with flexuous and Filamentous geometries. The diameter is around 12-13 nm, with a length of 720 nm. Genomes are linear, around 6.8kb in length. The genome has 2 open reading frames.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Mycoflexivirus Filamentous Non-enveloped Linear Monopartite

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Fungi serve as the natural host.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Mycoflexivirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids


  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
  3. ^ Howitt, R. L.; Beever, R. E.; Pearson, M. N.; Forster, R. L. (2001). "Genome characterization of Botrytis virus F, a flexuous rod-shaped mycovirus resembling plant 'potex-like' viruses". The Journal of General Virology. 82 (Pt 1): 67–78. doi:10.1099/0022-1317-82-1-67. PMID 11125160.