2QWK

THE X-RAY STRUCTURE OF A COMPLEX OF 5-N-ACETYL-5-AMINO-3-(1-ETHYLPROPOXY)-1-CYCLOHEXENE-1-CARBOXYLIC ACID (GS4071) AND WILDTYPE TERN N9 INFLUENZA VIRUS NEURAMINIDASE

• PDB DOI: https://doi.org/10.2210/pdb2QWK/pdb

• Classification: HYDROLASE
• Organism(s): Influenza A virus
• Expression System: Gallus gallus
• Mutation(s): No 


• Deposited: 1998-04-07 Released: 1998-11-11 
• Deposition Author(s): Varghese, J.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.172 
• R-Value Observed: 0.172 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 45.97 kDa 
• Atom Count: 3,564 
• Modelled Residue Count: 388 
• Deposited Residue Count: 388 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NEURAMINIDASE	A	388	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)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	B	7		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G46836GH GlyCosmos:  G46836GH GlyGen:  G46836GH

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
G39	E [auth A]	(3R,4R,5S)-4-(acetylamino)-5-amino-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylic acid C14 H24 N2 O4 NENPYTRHICXVCS-YNEHKIRRSA-N
NAG	D [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
CA	F [auth A], G [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
G39	Binding MOAD:  2QWK	IC50: 2 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.172 
• R-Value Observed: 0.172 
• Space Group: I 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 180.95	α = 90
b = 180.95	β = 90
c = 180.95	γ = 90

Software Package:

Software Name	Purpose
R-AXISII	data collection
PROTEIN	data reduction
X-PLOR	model building
X-PLOR	refinement
R-AXIS	data reduction
PROTEIN	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-11-11 
Deposition Author(s): Varghese, J.N.

Revision History  

• Version 1.0: 1998-11-11
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary
• Version 2.1: 2024-04-03
  Changes: Advisory, Data collection, Database references, Refinement description, Structure summary