Sequivirus

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Sequivirus
Description de l'image Defaut 2.svg.
Classification ICTV
Realm Riboviria
Règne Orthornavirae
Embranchement Pisuviricota
Classe Pisoniviricetes
Ordre Picornavirales
Famille Secoviridae

Genre

Sequivirus
ICTV 1993[1]

Espèces de rang inférieur

Voir texte

Sequivirus est un genre de virus de la famille des Secoviridae, qui comprend trois espèces acceptées par l'ICTV. Ce sont des virus à ARN linéaire à simple brin à polarité positive, rattachés au groupe IV de la classification Baltimore, qui infectent les plantes (phytovirus).

Ces virus sont transmis horizontalement par des pucerons (Cavariella aegopodii et Cavariella pastinacae), toutefois la transmission nécessite la présence d'un virus auxiliaire, Anthriscus yellows virus (genre Waikavirus)[2],[3].

Étymologie

Le nom générique, « Sequivirus », est dérivé du verbe latin sequī (suivre, accompagner, assister), en référence à la transmission du virus assistée par un virus auxilaire[3].

Structure

Les virions, non enveloppés, sont des particules à capside quasi-sphérique à symétrie icosaédrique (T=pseudo3) de 25 à 30 nm de diamètre[3].

Le génome, monopartite, est constitué d'une molécule d'ARN simple brin de polarité positive, linéaire, d'environ 9 kb. L'extrémité 5' a une protéine liée au génome (VPg)[3].

Liste d'espèces

Selon NCBI (31 janvier 2021)[4] :

Notes et références

  1. ↑ ICTV. International Committee on Taxonomy of Viruses. Taxonomy history. Published on the Internet https://talk.ictvonline.org/., consulté le 31 janvier 2021
  2. ↑ (en) « Genus: Sequivirus », sur talk.ictvonline.org, ICTV (consulté le ).
  3. ↑ a b c et d (en) « Sequivirus », sur ViralZone (consulté le )..
  4. ↑ NCBI, consulté le 31 janvier 2021

Liens externes

Sur les autres projets Wikimedia :

  • (en) Référence ICTV : Sequivirus (consulté le )
  • (en) « Sequivirus », sur ViralZone (consulté le ).

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