1LK3

ENGINEERED HUMAN INTERLEUKIN-10 MONOMER COMPLEXED TO 9D7 FAB FRAGMENT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Noncompetitive antibody neutralization of IL-10 revealed by protein engineering and x-ray crystallography.

Josephson, K.Jones, B.C.Walter, L.J.DiGiacomo, R.Indelicato, S.R.Walter, M.R.

(2002) Structure 10: 981-987


  • PubMed Abstract: 
  • IL-10 is a dimeric cytokine that must engage its high-affinity cell surface receptor, IL-10R1, to induce multiple cellular activities. Here we report the 1.9 A crystal structure of an engineered IL-10 monomer (IL-10M1) in complex with a neutralizing ...

    IL-10 is a dimeric cytokine that must engage its high-affinity cell surface receptor, IL-10R1, to induce multiple cellular activities. Here we report the 1.9 A crystal structure of an engineered IL-10 monomer (IL-10M1) in complex with a neutralizing Fab fragment (9D7Fab). 9D7Fab and IL-10R1 bind distinct nonoverlapping surfaces on IL-10M1. Antagonism of the IL-10M1/IL-10R1 interaction is the result of 9D7Fab-induced conformational changes in the CD loop of IL-10M1 that indirectly alter the structure of the IL-10R1 binding site. A single mutation (Ile87Ala) in the same CD loop region of the Epstein-Barr virus IL-10 (ebvIL-10) also reduces IL-10R1 binding affinity, suggesting that ebvIL-10 and 9D7Fab use similar allosteric mechanisms to modulate IL-10R1 affinity and biological activity.


    Related Citations: 
    • Design and Analysis of an Engineered Human Interleukin-10 Monomer
      Josephson, K.,DiGiacomo, R.,Indelicato, S.R.,Iyo, A.H.,Nagabhushan, T.L.,Parker, M.H.,Walter, M.R.,Ayo, A.H.
      (2000) J.Biol.Chem. 275: 13552


    Organizational Affiliation

    Center for Biophysical Sciences and Engineering, University of Alabama, Birmingham, 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-10
A, B
160Homo sapiensMutation(s): 0 
Gene Names: IL10
Find proteins for P22301 (Homo sapiens)
Go to Gene View: IL10
Go to UniProtKB:  P22301
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
9D7 Light Chain
L, M
210Rattus norvegicusMutation(s): 0 
Find proteins for P01835 (Rattus norvegicus)
Go to UniProtKB:  P01835
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
9D7 Heavy Chain
H, I
219Rattus norvegicusMutation(s): 0 
Find proteins for P20759 (Rattus norvegicus)
Go to UniProtKB:  P20759
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 82.554α = 90.00
b = 75.616β = 96.85
c = 111.975γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
CNSrefinement
MOSFLMdata reduction
AMoREphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-07-17
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance