2k36

Structure ensemble Backbone and side-chain 1H, 13C, and 15N Chemical Shift Assignments, 1H-15N RDCs and 1H-1H nOe restraints for protein K7 from the Vaccinia virus

spinqualitylabelsall models 2k36, 15 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2k36 is a 1 chain structure with sequence from Vaccinia virus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: K7R (Vaccinia virus) Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Poxviruses have evolved numerous strategies to evade host innate immunity. Vaccinia virus K7 is a 149-residue protein with previously unknown structure that is highly conserved in the orthopoxvirus family. K7 bears sequence and functional similarities to A52, which interacts with interleukin receptor-associated kinase 2 and tumor necrosis factor receptor-associated factor 6 to suppress nuclear factor kappaB activation and to stimulate the secretion of the anti-inflammatory cytokine interleukin-10. In contrast to A52, K7 forms a complex with DEAD box RNA helicase DDX3, thereby suppressing DDX3-mediated ifnb promoter induction. We determined the NMR solution structure of K7 to provide insight into the structural basis for poxvirus antagonism of innate immune signaling. The structure reveals an alpha-helical fold belonging to the Bcl-2 family despite an unrelated primary sequence. NMR chemical-shift mapping studies have localized the binding surface for DDX3 on a negatively charged face of K7. Furthermore, thermodynamic studies have mapped the K7-binding region to a 30-residue N-terminal fragment of DDX3, ahead of the core RNA helicase domains. Poxvirus K7 protein adopts a Bcl-2 fold: biochemical mapping of its interactions with human DEAD box RNA helicase DDX3.,Kalverda AP, Thompson GS, Vogel A, Schroder M, Bowie AG, Khan AR, Homans SW J Mol Biol. 2009 Jan 23;385(3):843-53. Epub 2008 Sep 27. PMID:18845156 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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