Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

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This is version 1.3 of the entry. See complete history


High-resolution solution structure of the EGF-like domain of heregulin-alpha.

Jacobsen, N.E.Abadi, N.Sliwkowski, M.X.Reilly, D.Skelton, N.J.Fairbrother, W.J.

(1996) Biochemistry 35: 3402-3417

  • DOI: https://doi.org/10.1021/bi952626l
  • Primary Citation of Related Structures:  
    1HAE, 1HAF

  • PubMed Abstract: 

    The solution structure of the 63-residue heregulin-alpha (HRG-alpha) epidermal growth factor (EGF)-like domain, corresponding to residues 177-239 of HRG-alpha, has been determined to high resolution using data from two-dimensional and three-dimensional homo- and heteronuclear NMR spectroscopy. The structure is based on a total of 887 internuclear distance and dihedral restraints derived from data obtained using unlabeled and uniformly 15N-labeled protein samples, at pH 4.5, 20 degrees C. A total of 20 structures were calculated using a hybrid distance geometry-simulated annealing approach with the program DGII, followed by restrained molecular dynamics using the program DISCOVER. The average maximum violations are 0.12 +/- 0.01 angstroms and 1.4 +/- 0.3 degrees for distance and dihedral restraints, respectively. The backbone (N,C(alpha),C) atomic rms distribution about the mean coordinates for residues 3-23 and 31-49 is 0.29 +/- 0/07 angstroms. The N-and C-terminal residues (1-2 and 50-63) and 24-30 are disordered. Comparison of the HRG-alpha EGF-like domain structure with the previously determined structure of human EGF [Hommel et al. (1992) J. Mol. Biol. 227, 271-282] reveals a high degree of structural similarity; excluding the N-terminal region (residues 1-13), the disordered phi-loop region (residues 24-30) that contains a three-residue insertion in HRG-alpha relative to hEGF, and the disordered C-terminal region (residues 50-63), the C(alpha) alignment between the HRG-alpha and hEGF minimized mean structures has a rms difference of approximately 1 angstrom. In HRG-alpha the N-terminal residues 2-6 form a well-defined beta strand rather than being disordered as found for hEGF. This structural difference correlates with functional data which suggest that the N-terminal region of the HRG-alpha EGF-like domain is responsible for the observed receptor specificity differences between HRG-alpha and EGF.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HEREGULIN-ALPHA63Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q02297 (Homo sapiens)
Explore Q02297 
Go to UniProtKB:  Q02297
PHAROS:  Q02297
GTEx:  ENSG00000157168 
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UniProt GroupQ02297
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-07-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations, Other