1IGL

SOLUTION STRUCTURE OF HUMAN INSULIN-LIKE GROWTH FACTOR II RELATIONSHIP TO RECEPTOR AND BINDING PROTEIN INTERACTIONS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution structure of human insulin-like growth factor II. Relationship to receptor and binding protein interactions.

Torres, A.M.Forbes, B.E.Aplin, S.E.Wallace, J.C.Francis, G.L.Norton, R.S.

(1995) J.Mol.Biol. 248: 385-401


  • PubMed Abstract: 
  • The three-dimensional structure of human insulin-like growth factor (IGF) II in aqueous solution at pH 3.1 and 300 K has been determined from nuclear magnetic resonance data and restrained molecular dynamics calculations. Structural constraints consi ...

    The three-dimensional structure of human insulin-like growth factor (IGF) II in aqueous solution at pH 3.1 and 300 K has been determined from nuclear magnetic resonance data and restrained molecular dynamics calculations. Structural constraints consisting of 502 NOE-derived distance constraints, 11 dihedral angle restraints, and three disulfide bridges were used as input for distance geometry calculations in DIANA and X-PLOR, followed by simulated annealing refinement and energy minimization in X-PLOR. The resulting family of 20 structures was well defined in the regions of residues 5 to 28 and 41 to 62, with an average pairwise root-mean-square deviation of 1.24 A for the backbone heavy-atoms (N, C2, C) and 1.90 A for all heavy atoms. The poorly defined regions consist of the N and C termini, part of the B-domain, and the C-domain loop. Resonances from these regions of the protein gave stronger cross peaks in two dimensional NMR spectra, consistent with significant motional averaging. The main secondary structure elements in IGF-II are alpha-helices encompassing residues 11 to 21, 42 to 49 and 53 to 59. A small anti-parallel beta-sheet is formed by residues 59 to 61 and 25 to 27, while residues 26 to 28 appear to participate in intermolecular beta-sheet formation. The structure of IGF-II in the well-defined regions is very similar to those of the corresponding regions of insulin and IGF-I. Significant differences between IGF-II and IGF-I occur near the start of the third helix, in a region known to modulate affinity for the type 2 IGF receptor, and at the C terminus. The IGF II structure is discussed in relation to its binding sites for the insulin and IGF receptors and the IGF binding proteins.


    Related Citations: 
    • Insulin-Like Growth Factors I and II
      Humbel, R.E.
      (1990) Eur.J.Biochem. 190: 445
    • Insulin-Like Growth Factor: A Model for Tertiary Structure Accounting for Immmunoreactivity and Receptor Binding
      Blundell, T.L.,Bedarkar, S.,Rinderknecht, E.,Humbel, R.E.
      (1978) Proc.Natl.Acad.Sci.USA 75: 180
    • Tertiary Structures, Receptor Binding, and Antigenicity of Insulinlike Growth Factors
      Blundell, T.L.,Bedarkar, S.,Humbel, R.E.
      (1983) FED.PROC. 42: 2592


    Organizational Affiliation

    NMR Laboratory Biomolecular Research Institute, Parkville, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INSULIN-LIKE GROWTH FACTOR II
A
67Homo sapiensGene Names: IGF2
Find proteins for P01344 (Homo sapiens)
Go to Gene View: IGF2
Go to UniProtKB:  P01344
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1IGL Olderado
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-02-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other