Journal
CHEMBIOCHEM
Volume 16, Issue 2, Pages 268-276Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.201402534
Keywords
intrinsically disordered proteins; NMR spectroscopy; protein-protein interactions; sequence determination; viral proteins
Funding
- French Agence Nationale de la Recherche (ANR) [ANR-08-PCVI-0020-01, ANR-09-BLAN-0100, ANR-11-ASTR-003-01]
- EC [264257, 211252, 261863]
- CNRS
- Fondation pour la Recherche Medicale
- University of Florence (Italy)
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0100] Funding Source: Agence Nationale de la Recherche (ANR)
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We provide an atomic-resolution description based on NMR spectroscopy, of the intrinsically disordered C-terminal domain of the Nipah virus nucleoprotein (N-TAIL), both in its isolated state and within the nucleocapsid (NC). Within the NC the second half of N-TAIL retains conformational behavior similar to that of isolated N-TAIL, whereas the first half of N-TAIL becomes much more rigid. In spite of the mostly disordered nature of N-TAIL, chemical shifts and relaxation measurements show a significant degree of alpha-helical sampling in the molecular recogni-tion element (MoRE) involved in binding to the X domain (XD) of the phosphoprotein, with this preconfiguration being more pronounced than in the N-TAIL domain from the cognate Hendra virus. Outside the MoRE, an additional region exhibiting reduced flexibility was identified within N-TAIL and found to be involved in binding to the XD. H-1-and C-13-detected titration NMR experiments support a highly dynamic binding of N-TAIL at the surface of the XD.
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