4NUX

Structure of receptor A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the unique SEFIR domain from human interleukin 17 receptor A reveals a composite ligand-binding site containing a conserved alpha-helix for Act1 binding and IL-17 signaling.

Zhang, B.Liu, C.Qian, W.Han, Y.Li, X.Deng, J.

(2014) Acta Crystallogr D Biol Crystallogr 70: 1476-1483

  • DOI: 10.1107/S1399004714005227
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Interleukin 17 (IL-17) cytokines play a crucial role in mediating inflammatory and autoimmune diseases. A unique intracellular signaling domain termed SEFIR is found within all IL-17 receptors (IL-17Rs) as well as the key adaptor protein Act1. SEFIR- ...

    Interleukin 17 (IL-17) cytokines play a crucial role in mediating inflammatory and autoimmune diseases. A unique intracellular signaling domain termed SEFIR is found within all IL-17 receptors (IL-17Rs) as well as the key adaptor protein Act1. SEFIR-mediated protein-protein interaction is a crucial step in IL-17 cytokine signaling. Here, the 2.3 Å resolution crystal structure of the SEFIR domain of IL-17RA, the most commonly shared receptor for IL-17 cytokine signaling, is reported. The structure includes the complete SEFIR domain and an additional α-helical C-terminal extension, which pack tightly together to form a compact unit. Structural comparison between the SEFIR domains of IL-17RA and IL-17RB reveals substantial differences in protein topology and folding. The uniquely long insertion between strand βC and helix αC in IL-17RA SEFIR is mostly well ordered, displaying a helix (αCC'ins) and a flexible loop (CC'). The DD' loop in the IL-17RA SEFIR structure is much shorter; it rotates nearly 90° with respect to the counterpart in the IL-17RB SEFIR structure and shifts about 12 Å to accommodate the αCC'ins helix without forming any knots. Helix αC was identified as critical for its interaction with Act1 and IL-17-stimulated gene expression. The data suggest that the heterotypic SEFIR-SEFIR association via helix αC is a conserved and signature mechanism specific for IL-17 signaling. The structure also suggests that the downstream motif of IL-17RA SEFIR together with helix αC could provide a composite ligand-binding surface for recruiting Act1 during IL-17 signaling.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-17 receptor A
A
216Homo sapiensMutation(s): 0 
Gene Names: IL17RAIL17R
Find proteins for Q96F46 (Homo sapiens)
Go to UniProtKB:  Q96F46
NIH Common Fund Data Resources
PHAROS  Q96F46
Protein Feature View
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.195 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.256α = 90
b = 136.13β = 90
c = 55.433γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-05-14
    Type: Initial release
  • Version 1.1: 2014-09-24
    Changes: Database references