1XOE

N9 Tern influenza neuraminidase complexed with (2R,4R,5R)-5-(1-Acetylamino-3-methyl-butyl-pyrrolidine-2, 4-dicarobyxylic acid 4-methyl esterdase complexed with

• PDB DOI: https://doi.org/10.2210/pdb1XOE/pdb

• Classification: HYDROLASE
• Organism(s): Influenza A virus
• Mutation(s): No 


• Deposited: 2004-10-06 Released: 2005-01-11 
• Deposition Author(s): Wang, G.T., Wang, S., Gentles, R., Sowin, T., Maring, C.J., Kempf, D.J., Kati, W.M., Stoll, V., Stewart, K.D., Laver, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.315 
• R-Value Work: 0.265 

Literature

Design, synthesis, and structural analysis of inhibitors of influenza neuraminidase containing a 2,3-disubstituted tetrahydrofuran-5-carboxylic acid core.

Wang, G.T., Wang, S., Gentles, R., Sowin, T., Maring, C.J., Kempf, D.J., Kati, W.M., Stoll, V., Stewart, K.D., Laver, G.

(2005) Bioorg Med Chem Lett 15: 125-128

• PubMed: 15582424 
• DOI: https://doi.org/10.1016/j.bmcl.2004.10.022
• Primary Citation of Related Structures:  
  1XOE, 1XOG


• PubMed Abstract: 
  

  (+/-)-(2R,3R,5R)-[2-(1'-S-acetamido-3'-methyl)butyl-3-methoxycarbonyl]tetrahydrofuran-5-carboxylic acid (9) and (+/-)-(2R,3R,5R)-[2-(1'-S-acetamido-3'-methyl)butyl-3-(4'-imidazolyl)]tetrahydrofuran 5-carboxylic acid (14) were synthesized as inhibitors of influenza neuraminidase (NA). Both compounds 9 and 14 inhibit influenza NA A with an IC(50) of about 0.5 microM and NA B with an IC(50) of 1.0 microM.

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Organizational Affiliation: 

Global Pharmaceutical Research & Development, Abbott Laboratories, Abbott Park, IL 60064, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 45.56 kDa 
• Atom Count: 3,525 
• Modelled Residue Count: 387 
• Deposited Residue Count: 387 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Neuraminidase	A	387	Influenza A virus	Mutation(s): 0  EC: 3.2.1.18
UniProt
Find proteins for P03472 (Influenza A virus (strain A/Tern/Australia/G70C/1975 H11N9)) Explore P03472  Go to UniProtKB:  P03472

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	B	6		N/A
Glycosylation Resources
GlyTouCan:  G01760ZU GlyCosmos:  G01760ZU GlyGen:  G01760ZU

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ABX	F [auth A]	5-[1-(ACETYLAMINO)-3-METHYLBUTYL]-4-(METHOXYCARBONYL)PROLINE C14 H24 N2 O5 OXAVBPLKPVSWSQ-WRWGMCAJSA-N
NAG	D [auth A], E [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
MAN	C [auth A]	alpha-D-mannopyranose C6 H12 O6 WQZGKKKJIJFFOK-PQMKYFCFSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
ABX	PDBBind:  1XOE	IC50: 41 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.315 
• R-Value Work: 0.265 
• Space Group: I 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 180.364	α = 90
b = 180.364	β = 90
c = 180.364	γ = 90

Software Package:

Software Name	Purpose
CNX	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-01-11 
Deposition Author(s): Wang, G.T., Wang, S., Gentles, R., Sowin, T., Maring, C.J., Kempf, D.J., Kati, W.M., Stoll, V., Stewart, K.D., Laver, G.

Revision History  

• Version 1.0: 2005-01-11
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary