3QWR

Crystal structure of IL-23 in complex with an adnectin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of adnectin/protein complexes reveal an expanded binding footprint.

Ramamurthy, V.Krystek, S.R.Bush, A.Wei, A.Emanuel, S.L.Das Gupta, R.Janjua, A.Cheng, L.Murdock, M.Abramczyk, B.Cohen, D.Lin, Z.Morin, P.Davis, J.H.Dabritz, M.McLaughlin, D.C.Russo, K.A.Chao, G.Wright, M.C.Jenny, V.A.Engle, L.J.Furfine, E.Sheriff, S.

(2012) Structure 20: 259-269

  • DOI: 10.1016/j.str.2011.11.016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Adnectins are targeted biologics derived from the tenth type III domain of human fibronectin (¹⁰Fn3), a member of the immunoglobulin superfamily. Target-specific binders are selected from libraries generated by diversifying the three ¹⁰Fn3 loops that ...

    Adnectins are targeted biologics derived from the tenth type III domain of human fibronectin (¹⁰Fn3), a member of the immunoglobulin superfamily. Target-specific binders are selected from libraries generated by diversifying the three ¹⁰Fn3 loops that are analogous to the complementarity determining regions of antibodies. The crystal structures of two Adnectins were determined, each in complex with its therapeutic target, EGFR or IL-23. Both Adnectins bind different epitopes than those bound by known monoclonal antibodies. Molecular modeling suggests that some of these epitopes might not be accessible to antibodies because of the size and concave shape of the antibody combining site. In addition to interactions from the Adnectin diversified loops, residues from the N terminus and/or the β strands interact with the target proteins in both complexes. Alanine-scanning mutagenesis confirmed the calculated binding energies of these β strand interactions, indicating that these nonloop residues can expand the available binding footprint.


    Organizational Affiliation

    Bristol-Myers Squibb Research & Development, Princeton, NJ 08543-4000, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-12 subunit beta
A
306Homo sapiensMutation(s): 0 
Gene Names: IL12B (NKSF2)
Find proteins for P29460 (Homo sapiens)
Go to Gene View: IL12B
Go to UniProtKB:  P29460
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Interleukin-23 subunit alpha
B
170Homo sapiensMutation(s): 0 
Gene Names: IL23A (SGRF)
Find proteins for Q9NPF7 (Homo sapiens)
Go to Gene View: IL23A
Go to UniProtKB:  Q9NPF7
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ADNECTIN
D
109N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAN
Query on MAN

Download SDF File 
Download CCD File 
A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.234 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 77.700α = 90.00
b = 91.700β = 90.00
c = 225.800γ = 90.00
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
d*TREKdata reduction
PHASERphasing
AMoREphasing
PDB_EXTRACTdata extraction
BUSTERrefinement
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-02-28 
  • Released Date: 2012-02-01 
  • Deposition Author(s): Wei, A., Sheriff, S.

Revision History 

  • Version 1.0: 2012-02-01
    Type: Initial release
  • Version 1.1: 2012-02-29
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description