6gbq

Crystal Structure of the oligomerization domain of Vp35 from Reston virus

spinqualitylabelsall models 6gbq, resolution 2.43Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6gbq is a 8 chain structure with sequence from Ebola virus reston. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: VP35, REBOVgp2 (Ebola virus Reston) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [VP35_EBORR] Acts as a polymerase cofactor in the RNA polymerase transcription and replication complex. Prevents establishment of cellular antiviral state by blocking virus-induced phosphorylation and activation of interferon regulatory factor 3 (IRF3), a transcription factor critical for the induction of interferons alpha and beta. The mechanism by which this blockage occurs remains incompletely defined, a hypothesis suggests that VP35 dsRNA-binding activity prevents activation of IRF3 by sequestering dsRNA. Also inhibits the antiviral effect mediated by the interferon-induced, double-stranded RNA-activated protein kinase EIF2AK2/PKR (By similarity). Publication Abstract from PubMed The multifunctional virion protein 35 (VP35) of ebolaviruses is a critical determinant of virulence and pathogenesis indispensable for viral replication and host innate immune evasion. Essential for VP35 function is homo-oligomerization via a coiled-coil motif. Here we report crystal structures of VP35 oligomerization domains from the prototypic Ebola virus (EBOV) and the non-pathogenic Reston virus (RESTV), together with a comparative biophysical characterization of the domains from all known species of the Ebolavirus genus. EBOV and RESTV VP35 oligomerization domains form bipartite parallel helix bundles with a canonical coiled coil in the N-terminal half and increased plasticity in the highly conserved C-terminal half. The domain assembles into trimers and tetramers in EBOV, whereas it exclusively forms tetramers in all other ebolavirus species. Substitution of coiled-coil leucine residues critical for immune antagonism leads to aberrant oligomerization. A conserved arginine involved in inter-chain salt bridges stabilizes the VP35 oligomerization domain and modulates between coiled-coil oligomeric states. Structures of Ebola and Reston Virus VP35 Oligomerization Domains and Comparative Biophysical Characterization in All Ebolavirus Species.,Zinzula L, Nagy I, Orsini M, Weyher-Stingl E, Bracher A, Baumeister W Structure. 2018 Oct 5. pii: S0969-2126(18)30335-6. doi:, 10.1016/j.str.2018.09.009. PMID:30482729 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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