VIRION
Enveloped, spherical. Diameter from 100 to 130nm.
GENOME
Negative-stranded RNA linear genome, about 11.6 kb in size. Encodes for six proteins.
GENE EXPRESSION
The viral RNA dependent RNA polymerase binds the encapsidated genome at the leader region, then sequentially transcribes each genes by recognizing start and stop signals flanking viral genes.
ENZYMES
- RNA-dependent RNA polymerase [L]
- Mononega-type capping
- RNA TPase, GTase, N7 Mtase, 2'O Mtase [L]
REPLICATION
CYTOPLASM
- Attachement of the viral glycoproteins to host receptors.
- Fusion of virus membrane with the vesicle membrane.
- Sequential transcription.
- Replication .
- Cytoplasmic ribo-nucleocapsids buds out of the cell,releasing new virions.