4ZF7 | pdb_00004zf7

Crystal structure of ferret interleukin-2

• PDB DOI: https://doi.org/10.2210/pdb4ZF7/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mustela putorius furo
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2015-04-21 Released: 2015-11-04 
• Deposition Author(s): Ren, B., Newman, J., McKinstry, W.J., Adams, T.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.89 Å
• R-Value Free: 
  0.197 (Depositor), 0.194 (DCC) 
• R-Value Work: 
  0.165 (Depositor), 0.165 (DCC) 
• R-Value Observed: 
  0.167 (Depositor) 

Literature

Structural and functional characterisation of ferret interleukin-2.

Ren, B., McKinstry, W.J., Pham, T., Newman, J., Layton, D.S., Bean, A.G., Chen, Z., Laurie, K.L., Borg, K., Barr, I.G., Adams, T.E.

(2015) Dev Comp Immunol 55: 32-38

• PubMed: 26472619 
• DOI: https://doi.org/10.1016/j.dci.2015.10.007
• Primary Citation Related Structures: 
  4ZF7


• PubMed Abstract: 
  

  While the ferret is a valuable animal model for a number of human viral infections, such as influenza, Hendra and Nipah, evaluating the cellular immune response following infection has been hampered by the lack of a number of species-specific immunological reagents. Interleukin 2 (IL-2) is one such key cytokine. Ferret recombinant IL-2 incorporating a C-terminal histidine tag was expressed and purified and the three-dimensional structure solved and refined at 1.89 Å by X-ray crystallography, which represents the highest resolution and first non-human IL-2 structure. While ferret IL-2 displays the classic cytokine fold of the four-helix bundle structure, conformational flexibility was observed at the second helix and its neighbouring region in the bundle, which may result in the disruption of the spatial arrangement of residues involved in receptor binding interactions, implicating subtle differences between ferret and human IL-2 when initiating biological functions. Ferret recombinant IL-2 stimulated the proliferation of ferret lymph node cells and induced the expression of mRNA for IFN-γ and Granzyme A.

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Organizational Affiliation: 
• CSIRO Manufacturing, Parkville, VIC 3052, Australia.
CSIRO Health and Biosecurity, Geelong, VIC 3219, Australia.
Department of Microbiology and Immunology, The University of Melbourne at the Doherty Institute, Melbourne, VIC 3000, Australia.
WHO Collaborating Centre for Reference and Research on Influenza (VIDRL), Peter Doherty Institute for Infection & Immunity, Melbourne, Australia.
CSIRO Manufacturing, Parkville, VIC 3052, Australia. Electronic address: [e-mail].

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 33.08 kDa 
• Atom Count: 2,371 
• Modeled Residue Count: 253 
• Deposited Residue Count: 276 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin 2	A, B	138	Mustela putorius furo	Mutation(s): 0
UniProt
Find proteins for A3FBE6 (Mustela putorius furo) Explore A3FBE6  Go to UniProtKB:  A3FBE6

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1PE	H [auth B]	PENTAETHYLENE GLYCOL C10 H22 O6 JLFNLZLINWHATN-UHFFFAOYSA-N
PG4	D [auth A], E [auth A]	TETRAETHYLENE GLYCOL C8 H18 O5 UWHCKJMYHZGTIT-UHFFFAOYSA-N
PEG	F [auth A]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
SO4	C [auth A], G [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.89 Å
• R-Value Free:  0.197 (Depositor), 0.194 (DCC) 
• R-Value Work:  0.165 (Depositor), 0.165 (DCC) 
• R-Value Observed: 0.167 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 92.938	α = 90
b = 92.938	β = 90
c = 89.352	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
Blu-Ice	data collection
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-11-04 
Deposition Author(s): Ren, B., Newman, J., McKinstry, W.J., Adams, T.E.

Revision History  

• Version 1.0: 2015-11-04
  Type: Initial release
  
• Version 1.1: 2015-11-11
  Changes: Database references
• Version 1.2: 2017-11-01
  Changes: Author supporting evidence, Data collection, Derived calculations
• Version 1.3: 2024-10-30
  Changes: Data collection, Database references, Structure summary