6N9Y

Atomic structure of Non-Structural protein 1 of bluetongue virus


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Atomic structure of the translation regulatory protein NS1 of bluetongue virus.

Kerviel, A.Ge, P.Lai, M.Jih, J.Boyce, M.Zhang, X.Zhou, Z.H.Roy, P.

(2019) Nat Microbiol 4: 837-845

  • DOI: 10.1038/s41564-019-0369-x
  • Primary Citation of Related Structures:  
    6N9Y

  • PubMed Abstract: 
  • Bluetongue virus (BTV) non-structural protein 1 (NS1) regulates viral protein synthesis and exists as tubular and non-tubular forms in infected cells, but how tubules assemble and how protein synthesis is regulated are unknown. Here, we report near-a ...

    Bluetongue virus (BTV) non-structural protein 1 (NS1) regulates viral protein synthesis and exists as tubular and non-tubular forms in infected cells, but how tubules assemble and how protein synthesis is regulated are unknown. Here, we report near-atomic resolution structures of two NS1 tubular forms determined by cryo-electron microscopy. The two tubular forms are different helical assemblies of the same NS1 monomer, consisting of an amino-terminal foot, a head and body domains connected to an extended carboxy-terminal arm, which wraps atop the head domain of another NS1 subunit through hydrophobic interactions. Deletion of the C terminus prevents tubule formation but not viral replication, suggesting an active non-tubular form. Two zinc-finger-like motifs are present in each NS1 monomer, and tubules are disrupted by divalent cation chelation and restored by cation addition, including Zn 2+ , suggesting a regulatory role of divalent cations in tubule formation. In vitro luciferase assays show that the NS1 non-tubular form upregulates BTV mRNA translation, whereas zinc-finger disruption decreases viral mRNA translation, tubule formation and virus replication, confirming a functional role for the zinc-fingers. Thus, the non-tubular form of NS1 is sufficient for viral protein synthesis and infectious virus replication, and the regulatory mechanism involved operates through divalent cation-dependent conversion between the non-tubular and tubular forms.


    Organizational Affiliation

    Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, UK. Polly.Roy@lshtm.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Non-structural protein 1A552Bluetongue virus 23Mutation(s): 0 
Gene Names: NS1
Find proteins for L7WU69 (Bluetongue virus 23)
Explore L7WU69 
Go to UniProtKB:  L7WU69
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI094386
Wellcome TrustUnited Kingdom100218
National Science Foundation (NSF, United States)United StatesMCB140140

Revision History 

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2019-05-01
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.3: 2019-12-18
    Changes: Other