1ICW

INTERLEUKIN-8, MUTANT WITH GLU 38 REPLACED BY CYS AND CYS 50 REPLACED BY ALA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural change and receptor binding in a chemokine mutant with a rearranged disulfide: X-ray structure of E38C/C50AIL-8 at 2 A resolution.

Eigenbrot, C.Lowman, H.B.Chee, L.Artis, D.R.

(1997) Proteins 27: 556-566


  • PubMed Abstract: 
  • The characteristic CXC chemokine disulfide core of interleukin-8 (IL-8) has been rearranged in a variant replacing the 9-50 disulfide with a 9-38 disulfide. The new variant has been characterized by its binding affinity to IL-8 receptors A and B and ...

    The characteristic CXC chemokine disulfide core of interleukin-8 (IL-8) has been rearranged in a variant replacing the 9-50 disulfide with a 9-38 disulfide. The new variant has been characterized by its binding affinity to IL-8 receptors A and B and the erythrocyte receptor DARC. This variant binds the three receptors with affinities between 500- and 2,500-fold lower than wild-type IL-8. Binding affinity results are also reported for the variant with alanine substituted for both cysteines 9 and 50. The Glu38-->Cys/Cys50-->Ala IL-8 crystallizes in space group P2(1)2(1)2(1) with cell parameters a = 46.4, b = 49.2, and c = 69.5 A, and has been refined to an R-value of 19.4% for data from 10 to 2 A resolution. Analysis of the structure confirms the new disulfide arrangement and suggests that changes at Ile10 may be the principal cause of the lowered affinities.


    Related Citations: 
    • Crystal Structure of Interleukin 8: Symbiosis of NMR and Crystallography
      Baldwin, E.T.,Weber, I.T.,Charles, R.St.,Xuan, J.C.,Appella, E.,Yamada, M.,Matsushima, K.,Edwards, B.F.,Clore, G.M.,Gronenborn, A.M.,al., et
      (1991) Proc.Natl.Acad.Sci.USA 88: 502


    Organizational Affiliation

    Department of Protein Engineering, Genentech, Inc., South San Francisco, California 94080-4990, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTERLEUKIN-8
A, B
72Homo sapiensMutation(s): 2 
Gene Names: CXCL8 (IL8)
Find proteins for P10145 (Homo sapiens)
Go to Gene View: CXCL8
Go to UniProtKB:  P10145
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.400α = 90.00
b = 49.200β = 90.00
c = 69.500γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
X-PLORphasing
X-PLORmodel building
XDSdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance