ArticleCommunications biology2026
Structural insights into the Nipah virus nucleocapsid assembly.
Article in Communications biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Nipah virus (NiV), a lethal zoonotic henipavirus, poses a major public health threat. Its nucleoprotein (N) safeguards the genome by forming a nucleocapsid, which, together with the RNA-dependent RNA polymerase (L) and phosphoprotein (P), constitutes the ribonucleoprotein complex. Here, we report a 2.96 Å cryo-EM structure of the NiV nucleocapsid co-expressed with L and P. The structure, resolved under C1 symmetry without imposing helical or other symmetry restraints, reveals irregular helical packing and axis bending that likely reflect the physiological nucleocapsid. Detailed analysis defines N-N and N-RNA interfaces, including critical salt bridges and hydrogen bonds, and uncovers a previously unrecognized loop-mediated contact bridging adjacent turns. Functional validation by site-directed mutagenesis and minigenome assays establishes their potential role of these interactions in nucleocapsid stability. Collectively, these integrated structural and functional insights refine our understanding of NiV nucleocapsid assembly and highlight structural vulnerabilities that could be targeted for antiviral development.
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