1IKL

NMR study of monomeric human interleukin-8 (minimized average structure)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

1H NMR solution structure of an active monomeric interleukin-8.

Rajarathnam, K.Clark-Lewis, I.Sykes, B.D.

(1995) Biochemistry 34: 12983-12990

  • Primary Citation of Related Structures:  1IKM

  • PubMed Abstract: 
  • The solution structure of a monomeric form of interleukin-8 (IL-8) has been solved using 1H NMR spectroscopy. The chemically synthesized nonnatural analog [IL-8 (4-72) L25 NH-->NCH3] has the same activity as that of native IL-8. Thirty structures wer ...

    The solution structure of a monomeric form of interleukin-8 (IL-8) has been solved using 1H NMR spectroscopy. The chemically synthesized nonnatural analog [IL-8 (4-72) L25 NH-->NCH3] has the same activity as that of native IL-8. Thirty structures were generated using the hybrid distance geometry and simulated annealing protocol using the program X-PLOR. The structure is well-defined except for N-terminal residues 4-6 and C-terminal residues 67-72. The rms distribution about the average structure for residues 7-66 is 0.38 A for the backbone atoms and 0.87 A for all heavy atoms. The structure consists of a series of turns and loops followed by a triple-stranded beta sheet and a C-terminal alpha helix. The structure of the monomer is largely similar to the native dimeric IL-8 structures previously determined by both NMR and X-ray methods. The major difference is that, in the monomeric analog, the C-terminal residues 67-72 are disordered whereas they are helical in the two dimeric structures. The best fit superposition of the backbone atoms of residues 7-66 of the monomer structure on the dimeric IL-8 structures showed rms differences of 1.5 and 1.2 A respectively. The turn (residues 31-35), which is disulfide linked to the N-terminal region, adopts a conformation in the monomer similar to that seen in the dimeric X-ray structure (rms difference 1.4 A) and different from that seen in the dimeric NMR structure (rms difference 2.7 A).(ABSTRACT TRUNCATED AT 250 WORDS)


    Related Citations: 
    • Neutrophil Activation by Monomeric Interleukin-8
      Rajarathnam, K.,Sykes, B.D.,Kay, C.M.,Dewald, B.,Geiser, T.,Baggiolini, M.,Clark-Lewis, I.
      (1994) Science 264: 90


    Organizational Affiliation

    Protein Engineering Network of Centres of Excellence, University of Alberta, Edmonton, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HUMAN INTERLEUKIN-8 (MONOMERIC)
A
72Homo sapiensGene Names: CXCL8 (IL8)
Find proteins for P10145 (Homo sapiens)
Go to Gene View: CXCL8
Go to UniProtKB:  P10145
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MLE
Query on MLE
A
L-PEPTIDE LINKINGC7 H15 N O2LEU
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance