Rodrigo A. Valverde*
Endornaviridae Study Group Chair
Department of Plant Pathology and Crop Physiology
Louisiana State University Agricultural Center
Baton Rouge
LA 70803 USA
E-mail: rvalverde@agcenter.lsu.edu
Betaendornaviruses infect ascomycete fungi. They are characterized by having shorter genomes (<10.7 kb) than alphaendornaviruses, lack of a glucosyltransferase domain which is present in the majority of alphaendornaviruses, but all encode a methyltransferase (Figure 1. Betaendornavirus). Furthermore, studied members lack a site-specific nick near the 5′-end of the positive-sense strand.
Alphaendornaviruses infect plants, fungi and the oomycete Phytophthora sp. They are characterized by longer genomes (>11.9 kb) than those of genus Betaendornavirus and the majority code for a glucosyltransferase domain (Figure 1. Alphaendornavirus). A site-specific nick near the 5′-end of the positive-sense strand of the replicative form has been reported for several alphaendornaviruses.
Rodrigo A. Valverde, Mahmoud E. Khalifa, Ryo Okada, Toshiyuki Fukuhara and Sead Sabanadzovic
The citation for this ICTV Report chapter is the summary published as Valverde et al., (2019):
ICTV Virus Taxonomy Profile: Endornaviridae, Journal of General Virology, 100, 1204–1205.
A summary of this ICTV Report chapter has been published as an ICTV Virus Taxonomy Profile article in the Journal of General Virology, and should be cited when referencing this online chapter as follows:
Hartley, C. J., Greenwood, D. R., Gilbert, R. J., Masoumi, A., Gordon, K. H., Hanzlik, T. N., Fry, E. E., Stuart, D. I. & Scotti, P. D. (2005). Kelp fly virus: a novel group of insect picorna-like viruses as defined by genome sequence analysis and a distinctive virion structure. J Virol 79, 13385-13398. [PubMed]
Katherine Brown
Department of Pathology
University of Cambridge
Cambridge CB2 1QP
UK
E-mail: kab84@cam.ac.uk
Ingrida Olendraite
Department of Pathology
University of Cambridge
Cambridge CB2 1QP
UK
E-mail: io239@cam.ac.uk
The sole member of the only species in this genus infects ants and has a genome organisation characterised by a single major ORF. This contrasts with the genome organisation of Solenopsis invicta virus 3 (genus Invictavirus), which has two major ORFs with ribosomal frameshifting used to express the 3′ ORF.
The sole member of the only species in this genus infects ants and has two major ORFs, with ORF2 (encoding the frameshift domain, FSD, and VP2) being expressed via ribosomal frameshifting.
See discussion under family description.
