1P9J

Solution structure and dynamics of the EGF/TGF-alpha chimera T1E


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 98 
  • Conformers Submitted: 36 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of an Epidermal Growth Factor/Transforming Growth Factor-alpha Chimera with Unique ErbB Binding Specificity.

Wingens, M.Walma, T.Van Ingen, H.Stortelers, C.Van Leeuwen, J.E.Van Zoelen, E.J.Vuister, G.W.

(2003) J.Biol.Chem. 278: 39114-39123

  • DOI: 10.1074/jbc.M305603200

  • PubMed Abstract: 
  • Various chimeras of the ErbB1-specific ligands epidermal growth factor (EGF) and transforming growth factor-alpha (TGFalpha) display an enlarged repertoire as activators of ErbB2.ErbB3 heterodimers. Mutational analysis indicated that particularly res ...

    Various chimeras of the ErbB1-specific ligands epidermal growth factor (EGF) and transforming growth factor-alpha (TGFalpha) display an enlarged repertoire as activators of ErbB2.ErbB3 heterodimers. Mutational analysis indicated that particularly residues in the N terminus and B-loop region of these ligands are involved in the broadened receptor specificity. In order to understand the receptor specificity of T1E, a chimeric ligand constructed by the introduction of the linear N-terminal region of TGFalpha into EGF, we determined in this study the solution structure and dynamics of T1E by multidimensional NMR analysis. Subsequently, we studied the structural characteristics of T1E binding to both ErbB1 and ErbB3 by superposition modeling of its structure on the known crystal structures of ErbB3 and liganded ErbB1 complexes. The results show that the overall structure of T1E in solution is very similar to that of native EGF and TGFalpha but that its N terminus shows an extended structure that is appropriately positioned to form a triple beta-sheet with the large antiparallel beta-sheet in the B-loop region. This conformational effect of the N terminus together with the large overall flexibility of T1E, as determined by 15N NMR relaxation analysis, may be a facilitative property for its broad receptor specificity. The structural superposition models indicate that hydrophobic and electrostatic interactions of the N terminus and B-loop of T1E are particularly important for its binding to ErbB3.


    Organizational Affiliation

    Department of Cell Biology, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands. m.wingens@sci.kun.nl




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
chimera of Epidermal growth factor(EGF) and Transforming growth factor alpha (TGF-alpha)
A
54Homo sapiensMutation(s): 0 
Gene Names: EGF
Find proteins for P01133 (Homo sapiens)
Go to Gene View: EGF
Go to UniProtKB:  P01133
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 98 
  • Conformers Submitted: 36 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1P9J Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-07
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance