Picornaviridae

Genus: Torchivirus


Genus: Torchivirus

Virion

Morphology

No surface morphology is visible by EM (Heuser et al., 2014).

Nucleic acid

Length of the incomplete genome (Farkas et al., 2015): 7,077 nt (5'-UTR: 192 nt; ORF: 6,654 nt; 3'-UTR: 231 nt). The location of the cre has not been identified.

Genome organization and replication

Genome layout:

VPg+5'UTRIRES[L/1A-1B-1C-1D-2Anpgp/2B-2C/3A-3B-3C-3D]3'UTR-poly(A)

The deduced polyprotein has a length of 2,218 amino acids. The L protein has unknown function. Protein 2A has a length of 145 amino acids, exhibits a NPG↓P motif and lacks similarity to other picornaviruses.

Biology

Torchiviruses were isolated from various tortoise species (Testudo graeca, Testudo hermanni, Geochelone sulcata, Pyxis arachnoides) in Hungary and Germany. Viruses were propageted in Terrapene heart permanent cell line (ATCC CCL-50). Torchivirus infections have been associated with various clinical signs and pathological lesions including softening of the carapax of young animals, diphtheroid necrotizing stomatitis and pharyngitis, rhinitis, pneumonia, conjunctivitis, enteritis and ascites, but they have also been isolated from clinically healthy animals (Heuser et al., 2014, Farkas et al., 2015).

Member Species

SpeciesVirus name(s)Exemplar isolateExemplar accession numberExemplar RefSeq numberAvailable sequenceOther isolatesOther isolate accession numbersVirus Abbreviation(s)
Torchivirus Atortoise picornavirus KM873611NC_025890Complete genomeToPV

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.
Download GenBank/EMBL query for sequences listed in the table here.

Derivation of names

Torchi: from tortoise virus X (chi; Greek letter C).

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  • When: Aug 1, 2017 2:06 PM
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  • When: Aug 30, 2017 11:52 PM
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