Partitivirus
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. Penicillium stoloniferum virus. Fig. 1 Negatively stained particles with 1% uranyl acetate. Length of bar (nm): 50 (Modified from Bozarth RF, Wood HA, Madelbrot A (1971) Virology 45:516–523)
Virion Morphology:
Icosahedral
Envelope:
No
Diameter (nm):
30–35
Length (nm):
–
Structural components:
Capsid
Buoyant density (g/mL):
1.34–1.36
Buoyant density method: CsCl Lipid composition:
Nonenveloped
Additional information:
Capsid has sixty protrusions (arch-like morphology in PsV-S and PsV-F) that are dimers of the capsid protein
C. Tidona, G. Darai (eds.), The Springer Index of Viruses, DOI 10.1007/978-0-387-95919-1, # Springer Science+Business Media, LLC 2011
1180
Partitivirus
Genome Nucleic acid:
RNA
Strandedness:
Double-stranded
Polarity:
–
Configuration:
Linear
Segment organization:
Segment no. 1 (kb):
1.6–2.4
Segment no. 2 (kb):
1.4–2.3
Two segment(s):
3–4.7 (kb) total (calculated)
G + C content (%):
38.3–54.6
mRNA transcripts:
2
Open reading frames:
2
Additional information:
The two genomic segments are of similar size
Replication Entry mechanism:
Cytoplasmic fusion between compatible host strains
Site of transcription:
In viro (inside the virion; in cytoplasm)
Transcriptase:
Virus-encoded RNA-dependent RNA polymerase
Site of genome replication:
In viro (inside the virion; in cytoplasm)
Replicase:
Virus-encoded RNA-dependent RNA polymerase
Replication Intermediate:
(+) sense RNA transcript as template for ( ) sense synthesis
Site of virion assembly:
Cytoplasm
Egress mechanism:
Viruses have no extracellular phase in their life cycles
Additional information:
Virus transmitted via cytoplasmic exchange between vegetatively compatible host strains
History Year of event
Event
References
1967
First discovery of virus particles of a partitivirus in Penicillium stoloniform
Ellis LF, Kleinschmidt WJ (1967) Nature 215:649–650
1968
First evidence that the isometric particles from Penicillium stoloniferum contain dsRNA
Banks GT et al (1968) Nature 218:542–545
1971
First description of physico-chemical properties of a partitivirus
Bozarth RF et al (1971) Virology 45:516–523
1973
First characterization of density components associated with partitivirus infections
Buck KW, Kempson-Jones GF (1973) J Gen Virol 18:223–235
1995
First complete sequence of a partitivirus
Oh C-S, Hillman BI (1995) J Gen Virol 76:1461–1470
2006
First successful infection using purified partitivirus particles
Saski A et al (2006) Arch Virol 151:697–707
Partitivirus
˚ resolution and viewed . Radially color-cued, shaded-surface representation of PsV-S virion cryo-reconstruction at 7.3-A along a two-fold axis of symmetry. Fig. 2 Each of the sixty arch-like protrusions on the PsV-S surface consists of an asymmetric dimer of the 47-kDa coat protein (With permission (Copyright Elsevier, Structure 16, 776–786, 2008))
Year of event
Event
References
2008
First reported cryoEM reconstruction of a partitivirus
Ochoa WF et al (2008) Structure 16:776–786
2009
First report on
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