4HR9 | pdb_00004hr9

Human interleukin 17A

• PDB DOI: https://doi.org/10.2210/pdb4HR9/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): Yes 


• Deposited: 2012-10-26 Released: 2013-05-22 
• Deposition Author(s): Liu, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 
  0.233 (Depositor), 0.238 (DCC) 
• R-Value Work: 
  0.210 (Depositor), 0.213 (DCC) 
• R-Value Observed: 
  0.211 (Depositor) 

Literature

Crystal structures of interleukin 17A and its complex with IL-17 receptor A.

Liu, S., Song, X., Chrunyk, B.A., Shanker, S., Hoth, L.R., Marr, E.S., Griffor, M.C.

(2013) Nat Commun 4: 1888-1888

• PubMed: 23695682 
• DOI: https://doi.org/10.1038/ncomms2880
• Primary Citation Related Structures: 
  4HR9, 4HSA


• PubMed Abstract: 
  

  The constituent polypeptides of the interleukin-17 family form six different homodimeric cytokines (IL-17A-F) and the heterodimeric IL-17A/F. Their interactions with IL-17 receptors A-E (IL-17RA-E) mediate host defenses while also contributing to inflammatory and autoimmune responses. IL-17A and IL-17F both preferentially engage a receptor complex containing one molecule of IL-17RA and one molecule of IL-17RC. More generally, IL-17RA appears to be a shared receptor that pairs with other members of its family to allow signaling of different IL-17 cytokines. Here we report crystal structures of homodimeric IL-17A and its complex with IL-17RA. Binding to IL-17RA at one side of the IL-17A molecule induces a conformational change in the second, symmetry-related receptor site of IL-17A. This change favors, and is sufficient to account for, the selection of a different receptor polypeptide to complete the cytokine-receptor complex. The structural results are supported by biophysical studies with IL-17A variants produced by site-directed mutagenesis.

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Organizational Affiliation: 
• Structural Biology and Biophysics Group, Pfizer Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, USA. [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: 28.24 kDa 
• Atom Count: 1,611 
• Modeled Residue Count: 189 
• Deposited Residue Count: 244 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin-17A	A, B	122	Homo sapiens	Mutation(s): 2  Gene Names: IL17A, CTLA8, IL17
UniProt & NIH Common Fund Data Resources
Find proteins for Q16552 (Homo sapiens) Explore Q16552  Go to UniProtKB:  Q16552
PHAROS:  Q16552 GTEx:  ENSG00000112115

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free:  0.233 (Depositor), 0.238 (DCC) 
• R-Value Work:  0.210 (Depositor), 0.213 (DCC) 
• R-Value Observed: 0.211 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.35	α = 90
b = 85.25	β = 90
c = 119.86	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-05-22 
Deposition Author(s): Liu, S.

Revision History  

• Version 1.0: 2013-05-22
  Type: Initial release
  
• Version 1.1: 2013-06-05
  Changes: Database references
• Version 1.2: 2013-06-19
  Changes: Database references
• Version 1.3: 2024-11-20
  Changes: Data collection, Database references, Structure summary