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Totiviridae

Totiviridae

provided by wikipedia EN

Totiviridae is a family of viruses. Giardia lamblia, leishmania, trichomonas vaginalis, and fungi serve as natural hosts. There are currently 28 species in this family, divided among 5 genera.[1][2]

Taxonomy

Group: dsRNA

Order: Unassigned

[2]

Structure

Viruses in Totiviridae are non-enveloped, double-stranded RNA viruses with icosahedral geometries, and T=2 symmetry. The virion consists of a single capsid protein and is about 40 nanometers in diameter.

The genome is composed of a linear double-stranded RNA molecule of 4.6–6.7 kilobases. It contains 2 overlapping open reading frames (ORF)[1]gag and pol—which respectively encode the capsid protein and the RNA-dependent RNA polymerase. Some totiviruses contain a third small potential ORF.

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation Giardiavirus Icosahedral T=2 Non-enveloped Linear Monopartite Leishmaniavirus Icosahedral T=2 Non-enveloped Linear Monopartite Totivirus Icosahedral T=2 Non-enveloped Linear Monopartite Victorivirus Icosahedral T=2 Non-enveloped Linear Trichomonasvirus Icosahedral T=2 Non-enveloped Linear

Life cycle

Viral replication is cytoplasmic. Replication follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription. Translation takes place by -1 ribosomal frameshifting, +1 ribosomal frameshifting, viral initiation, and RNA termination-reinitiation. The virus exits the host cell by cell-to-cell movement. Giardia lamblia protozoa, leishmania protozoa, protozoan trichomonas vaginalis, and fungi serve as the natural host.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission Giardiavirus Protozoa None Cell receptor endocytosis Exocytosis Cytoplasm Cytoplasm Passive diffusion Leishmaniavirus Protozoa: leishmania None Cell receptor endocytosis Cell division Cytoplasm Cytoplasm Cell division Totivirus Fungi: saccharomyces cerevisiae; fungi: smut fungi None Cytoplasmic exchange, sporogenesis; hyphal anastomosis Cytoplasmic exchange, sporogenesis; hyphal anastomosis Cytoplasm Cytoplasm Cell division; sporogenesis; cell fusion Victorivirus Fungi None Unknown Unknown Cytoplasm Cytoplasm Unknown Trichomonasvirus Protozoa Endocytosis Unknown Unknown Cytoplasm Cytoplasm Unknown

References

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015..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 ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.

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Totiviridae: Brief Summary

provided by wikipedia EN

Totiviridae is a family of viruses. Giardia lamblia, leishmania, trichomonas vaginalis, and fungi serve as natural hosts. There are currently 28 species in this family, divided among 5 genera.

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