2N74 | pdb_00002n74

Solution Structure of the RNA-Binding domain of non-structural protein 1 from the 1918 H1N1 influenza virus

• PDB DOI: https://doi.org/10.2210/pdb2N74/pdb
• BMRB: 25793

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus (A/Brevig Mission/1/1918(H1N1))
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-09-03 Released: 2015-09-30 
• Deposition Author(s): Jureka, A.S., Kleinpeter, A.B., Cornilescu, G., Cornilescu, C.C., Schwieters, C.D., Petit, C.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 

Literature

Structural Basis for a Novel Interaction between the NS1 Protein Derived from the 1918 Influenza Virus and RIG-I.

Jureka, A.S., Kleinpeter, A.B., Cornilescu, G., Cornilescu, C.C., Petit, C.M.

(2015) Structure 23: 2001-2010

• PubMed: 26365801 
• DOI: https://doi.org/10.1016/j.str.2015.08.007
• Primary Citation Related Structures: 
  2N74


• PubMed Abstract: 
  

  The influenza non-structural protein 1 (NS1) plays a critical role in antagonizing the innate immune response to infection. One interaction that facilitates this function is between NS1 and RIG-I, one of the main sensors of influenza virus infection. While NS1 and RIG-I are known to interact, it is currently unclear whether this interaction is direct or if it is mediated by other biomolecules. Here we demonstrate a direct, strain-dependent interaction between the NS1 RNA binding domain (NS1(RBD)) of the influenza A/Brevig Mission/1918 H1N1 (1918(H1N1)) virus and the second caspase activation and recruitment domain of RIG-I. Solving the solution structure of the 1918(H1N1) NS1(RBD) revealed features in a functionally novel region that may facilitate the observed interaction. The biophysical and structural data herein suggest a possible mechanism by which strain-specific differences in NS1 modulate influenza virulence.

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Organizational Affiliation: 
• Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, WI 53706, USA.
Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 16.82 kDa 
• Atom Count: 1,178 
• Modeled Residue Count: 146 
• Deposited Residue Count: 146 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Non-structural protein 1	A, B	73	Influenza A virus (A/Brevig Mission/1/1918(H1N1))	Mutation(s): 0  Gene Names: NS
UniProt
Find proteins for Q99AU3 (Influenza A virus (strain A/Brevig Mission/1/1918 H1N1)) Explore Q99AU3  Go to UniProtKB:  Q99AU3

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-09-30 
Deposition Author(s): Jureka, A.S., Kleinpeter, A.B., Cornilescu, G., Cornilescu, C.C., Schwieters, C.D., Petit, C.M.

Revision History  

• Version 1.0: 2015-09-30
  Type: Initial release
  
• Version 1.1: 2015-11-18
  Changes: Database references
• Version 1.2: 2023-06-14
  Changes: Data collection, Database references, Other
• Version 1.3: 2024-05-15
  Changes: Data collection, Database references