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Narnaviridae
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Narnaviridae is a family of positive single stranded RNA viruses. Members of this family have no capsid.[1] Fungi serve as natural hosts. There are currently seven species in this family, divided among 2 genera.[2][3]

Virology

The genome of these viruses is unipartate and between 2.3 and 3.5 kilobases in length. It encodes a single gene—the RNA dependent RNA polymerase. This protein is associated with the genome in the cytoplasm of the host.[4] The viruses do not have a capsid or envelop and do not form any infectious viral particles except lipid vesicles.[5]

They infect fungi (including yeast) and oomycetes.[6] Mitovirues appear to be among the most common fungi viruses.[5]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation Mitovirus No structural proteins Non-enveloped Linear Monopartite Narnavirus No structural proteins Non-enveloped Linear Monopartite

Life cycle

Viral replication is cytoplasmic. Replication follows the positive stranded RNA virus replication model. Positive-stranded RNA-virus transcription is the method of transcription. The virus exits the host cell by cell to cell movement. Fungi serve as the natural host. Transmission routes are parental and sexual.[2]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission Mitovirus Fungi None Horizontal; vertical None Cytoplasm Cytoplasm Horizontal: mating; vertical: parental Narnavirus Fungi None Horizontal; vertical None Cytoplasm Cytoplasm Horizontal: mating; vertical: parental

Taxonomy

Two genera have been recognised to date. Mitoviruses infect the mitochondria of fungi while narnaviruses remain within the cytoplasm of the host cell.[5]

Group: ssRNA(+)

[3]

Other proposed members of the Mitovirus genus are OnuMV1c and OnuMV7.[7]

Their closest relatives among RNA viruses are plant-infecting viruses of genus Ourmiavirus, which, however, have a capsid and a number of other proteins. Other close relatives are bacteriophages of the family Leviviridae.[5]

References

  1. ^ Dolja, V. V.; Koonin, E. V. (2012). "Capsid-Less RNA Viruses". ELS. doi:10.1002/9780470015902.a0023269. ISBN 0470016175..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
  2. ^ a b "Viral Zone". ExPASy. Retrieved 15 June 2015.
  3. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
  4. ^ Solorzano A, Rodríguez-Cousiño N, Esteban R, Fujimura T (2000) Persistent yeast single-stranded RNA viruses exist in vivo as genomic RNA. RNA polymerase complexes in 1:1 stoichiometry. J Biol Chem 275(34):26428–35
  5. ^ a b c d Hillman, B. I.; Cai, G. (2013). "The Family Narnaviridae". Mycoviruses. Advances in Virus Research. 86. p. 149. doi:10.1016/B978-0-12-394315-6.00006-4. ISBN 9780123943156.
  6. ^ Cai G, Myers K, Fry WE, Hillman BI (2011) A member of the virus family Narnaviridae from the plant pathogenic oomycete Phytophthora infestans. Arch Virol
  7. ^ Hintz W, Kassatenko I, Varga A, James D (2013) Two novel mitoviruses from a Canadian isolate of the Dutch elm pathogen Ophiostoma novo-ulmi (93–1224). Virology Journal 10(252). DOI: 10.1186/1743-422X-10-252

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Narnaviridae: Brief Summary
provided by wikipedia EN

Narnaviridae is a family of positive single stranded RNA viruses. Members of this family have no capsid. Fungi serve as natural hosts. There are currently seven species in this family, divided among 2 genera.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN
ID
305fee0229d6fcfa9b311325314352e4