Polymerase cofactor VP35 - Q05127 (VP35_EBOZM)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q05127: 24
Plays an essential role in viral RNA synthesis and also a role in suppressing innate immune signaling. Acts as a polymerase cofactor in the RNA polymerase transcription and replication complexes. Serves as nucleoprotein/NP monomer chaperone prior to the formation of the large oligomeric RNA-bound complexes. Prevents establishment of cellular antiviral state, thereby suppressing host DC maturation (PubMed:26962215). Acts by inhibiting host DDX58/RIG-I activation both by shielding dsRNA from detection and by preventing PRKRA binding to DDX58 (PubMed:23870315). Blocks virus-induced phosphorylation and activation of interferon regulatory factor 3/IRF3, a transcription factor critical for the induction of interferons alpha and beta. This blockage is produced through the interaction with and inhibition of host IKBKE and TBK1, producing a strong inhibition of the phosphorylation and activation of IRF3. Also inhibits the antiviral effect mediated by the host interferon-induced, double-stranded RNA-activated protein kinase EIF2AK2/PKR (PubMed:17065211). UniProt
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Subunit Structure
Homooligomer. Homomultimerizes via the coiled coil domain. Interacts with nucleoprotein NP and polymerase L (PubMed:25865894); VP35 bridges L and NP. Interacts with VP24. Interacts with VP40; this interaction is important for interaction is sufficient for viral genome packaging. Interacts with VP30 (PubMed:23493393). Interacts with host IKBKE and TBK1; the interactions lead to inhibition of cellular antiviral response by blocking necessary interactions of IKBKE and TBK1 with their substrate IRF3. Interacts with host DYNLL1; this interaction stabilizes VP35 N-terminal oligomerization domain, enhances viral RNA synthesis but does participate in suppressing the host innate immune response. Interacts with host PRKRA; this interaction inhibits the interaction between DDX58 and PRKRA. Interacts with dsRNA (PubMed:23870315, PubMed:19122151, PubMed:20071589). Interacts with host TRIM6; this interaction plays an important role in promoting efficient viral replication (PubMed:28679761). Interacts with host STAU1 (PubMed:30301857). UniProt
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