1AIL | pdb_00001ail

N-TERMINAL FRAGMENT OF NS1 PROTEIN FROM INFLUENZA A VIRUS

• PDB DOI: https://doi.org/10.2210/pdb1AIL/pdb

• Classification: RNA BINDING PROTEIN
• Organism(s): Influenza A virus (A/Udorn/307/1972(H3N2))
• Mutation(s): No 


• Deposited: 1997-04-21 Released: 1997-10-22 
• Deposition Author(s): Liu, J., Lynch, P.A., Chien, C., Montelione, G.T., Krug, R.M., Berman, H.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 
  0.229 (Depositor), 0.224 (DCC) 
• R-Value Work: 
  0.182 (Depositor), 0.177 (DCC) 

Literature

Crystal structure of the unique RNA-binding domain of the influenza virus NS1 protein.

Liu, J., Lynch, P.A., Chien, C.Y., Montelione, G.T., Krug, R.M., Berman, H.M.

(1997) Nat Struct Biol 4: 896-899

• PubMed: 9360602 
• DOI: https://doi.org/10.1038/nsb1197-896
• Primary Citation Related Structures: 
  1AIL


• PubMed Abstract: 
  

  The nonstructural protein (NS1 protein) of the influenza A virus binds to several types of RNAs. X-ray crystallographic analysis of the RNA-binding domain reveals a unique topology for the monomer as well as a novel six-helix structure for the dimer.

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,PQS (software)

Macromolecule Content 

• Total Structure Weight: 8.34 kDa 
• Atom Count: 592 
• Modeled Residue Count: 70 
• Deposited Residue Count: 73 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NONSTRUCTURAL PROTEIN NS1	A	73	Influenza A virus (A/Udorn/307/1972(H3N2))	Mutation(s): 0
UniProt
Find proteins for P03495 (Influenza A virus (strain A/Udorn/307/1972 H3N2)) Explore P03495  Go to UniProtKB:  P03495

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free:  0.229 (Depositor), 0.224 (DCC) 
• R-Value Work:  0.182 (Depositor), 0.177 (DCC) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.651	α = 90
b = 38.651	β = 90
c = 82.928	γ = 90

Software Package:

Software Name	Purpose
PHASES	phasing
SOLOMON	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-10-22 
Deposition Author(s): Liu, J., Lynch, P.A., Chien, C., Montelione, G.T., Krug, R.M., Berman, H.M.

Revision History  

• Version 1.0: 1997-10-22
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Structure summary