Virion

Nucleic acid

Length of genome (Woo et al., 2010): c. 7,640-7,678 nt (5'-UTR: 636-646 nt; ORF: 6,765-6,774 nt; 3' UTR: 238-256 nt). The location of the cre has not been identified.

Genome organization and replication

Genome layout:

VPg+5'UTR^IRES-V[L/1AB-1C-1D/2A-2B-2C/3A-3B-3C-3D]3'UTR-poly(A)

The deduced polyprotein has a length of 2,255-2,258 aa. The genome encodes a L protein. 1AB remains uncleaved (with myristoylation signal). 2A protein has unknown function.

Antigenicity

See discussion under family description.

Biology

Viral RNA was detected in faeces of the oriental magpie robin (Copsychus saularis) and the grey-backed thrush (Turdus hortulorum). Two genetic virus types are defined.

Species demarcation criteria

The single species Oscivirus A includes two genetic types classified by means of phylogenetic clustering.

Member species

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.

Derivation of names

Osci: from Oscines (Latin oscen, 'a songbird')