Although many components of the<unk> V's RNA play an important role in the virus’ pathology, the nonstructural protein encoded on the S segment (NSs) is the only component that has been found to directly affect the host. NSs is hostile and combative against the hosts interferon (IFNs) antiviral response. IFNs are essential in order for the immune system to fight off viral infections in a host. This inhibitory mechanism is believed to be due to a number of reasons, the first being, competitive inhibition of the formation of the transcription factor. On this transcription factor, NSs interacts with and binds to a subunit that is needed for RNA polymerase I and II. This interaction cause competitive inhibition with another transcription factor component and prevents the assembly process of the transcription factor complex, which results in the suppression of the host antiviral response. Transcription suppression is believed to be another mechanism of this inhibitory process. This occurs when an area of NSs interacts with and binds to the host's protein, SAP30 and forms a complex. This complex causes histone acetylation to regress, which is needed for transcriptional activation of the IFN promoter. This causes IFN expression to be obstructed. Lastly, NSs has also been known to affect regular activity of double-stranded RNA-dependent protein kinase R.. This protein is involved in cellular antiviral responses in the host. When<unk> V is able to enter the hosts DNA, NSs forms a filamentous structure in the nucleus. This allows the virus to interact with specific areas of the hosts DNA that relates to segregation defects and induction of chromosome continuity. This increases host infectivity and decreases the host's antiviral response.
Rift Valley fever
Chikungunya
Zika fever
Ross River fever
Malaria
Yellow fever
Trench fever
Blackwater fever