6bw0

Nipah virus W protein C-terminus in complex with Importin alpha 1

spinqualitylabelsall models 6bw0, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6bw0 is a 2 chain structure with sequence from Mus musculus and Nipah henipavirus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function W_NIPAV Prevent the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta). Interacts with host STAT1 protein in the nucleus, blocking it's phosphorylation by IFN-alpha/beta. Also blocks antiviral state induced by Toll-like receptor 3/TLR3 binding to dsRNA. Publication Abstract from PubMed Seven human isoforms of importin alpha mediate nuclear import of cargo in a tissue- and isoform-specific manner. How nuclear import adaptors differentially interact with cargo harbouring the same nuclear localisation signal (NLS) remains poorly understood, as the NLS recognition region is highly conserved. Here, we provide a structural basis for the nuclear import specificity of W proteins in Hendra and Nipah viruses. We determine the structural interfaces of these cargo bound to importin alpha1 and alpha3, identifying a 2.4-fold more extensive interface and > 50-fold higher binding affinity for importin alpha3. Through the design of importin alpha1 and alpha3 chimeric and mutant proteins, together with structures of cargo-free importin alpha1 and alpha3 isoforms, we establish that the molecular basis of specificity resides in the differential positioning of the armadillo repeats 7 and 8. Overall, our study provides mechanistic insights into a range of important nucleocytoplasmic transport processes reliant on isoform adaptor specificity. Structural basis for importin alpha 3 specificity of W proteins in Hendra and Nipah viruses.,Smith KM, Tsimbalyuk S, Edwards MR, Cross EM, Batra J, Soares da Costa TP, Aragao D, Basler CF, Forwood JK Nat Commun. 2018 Sep 12;9(1):3703. doi: 10.1038/s41467-018-05928-5. PMID:30209309 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Importin 3D structures

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