1MHJ

SOLUTION STRUCTURE OF THE SUPERACTIVE MONOMERIC DES-[PHE(B25)] HUMAN INSULIN MUTANT. ELUCIDATION OF THE STRUCTURAL BASIS FOR THE MONOMERIZATION OF THE DES-[PHE(B25)] INSULIN AND THE DIMERIZATION OF NATIVE INSULIN


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 the superactive monomeric des-[Phe(B25)] human insulin mutant: elucidation of the structural basis for the monomerization of des-[Phe(B25)] insulin and the dimerization of native insulin.

Jorgensen, A.M.Olsen, H.B.Balschmidt, P.Led, J.J.

(1996) J.Mol.Biol. 257: 684-699

  • DOI: 10.1006/jmbi.1996.0194

  • PubMed Abstract: 
  • The three-dimensional solution structure of des-[Phe(B25)] human insulin has been determined by nuclear magnetic resonance spectroscopy and restrained molecular dynamics calculations. Thirty-five structures were calculated by distance geometry from 5 ...

    The three-dimensional solution structure of des-[Phe(B25)] human insulin has been determined by nuclear magnetic resonance spectroscopy and restrained molecular dynamics calculations. Thirty-five structures were calculated by distance geometry from 581 nuclear Overhauser enhancement-derived distance constraints, ten phi torsional angle restraints, the restraints from 16 helical hydrogen bonds, and three disulfide bridges. The distance geometry structures were optimized using simulated annealing and restrained energy minimization. The average root-mean-square (r.m.s.) deviation for the best 20 refined structures is 1.07 angstroms for the backbone and 1.92 angstroms for all atoms if the less well-defined N and C-terminal residues are excluded. The helical regions are more well defined, with r.m.s. deviations of 0.64 angstroms for the backbone and 1.51 angstroms for all atoms. It is found that the des-[Phe(B25)] insulin is a monomer under the applied conditions (4.6 to 4.7 mM, pH 3.0, 310 K), that the overall secondary and tertiary structures of the monomers in the 2Zn crystal hexamer of native insulin are preserved, and that the conformation-averaged NMR solution structure is close to the structure of molecule 1 in the hexamer. The structure reveals that the lost ability of des-[Phe(B25)] insulin to self-associate is caused by a conformational change of the C-terminal region of the B-chain, which results in an intra-molecular hydrophobic interaction between Pro(B28) and the hydrophobic region Leu(B11)-Leu(B15) of the B-chain alpha-helix. This interaction interferes with the inter-molecular hydrophobic interactions responsible for the dimerization of native insulin, depriving the mutant of the ability to dimerize. Further, the structure displays a series of features that may explain the high potency of the mutant on the basis of the current model for the insulin-receptor interaction. These features are: a change in conformation of the C-terminal region of the B-chain, the absence of strong hydrogen bonds between this region and the rest of the molecule, and a relatively easy accessibility to the Val(A3) residue.


    Related Citations: 
    • Structural Details of Asp(B9) Human Insulin at Low Ph from 2D NMR Titration Studies
      Sorensen, M.D.,Led, J.J.
      (1994) Biochemistry 33: 13727
    • A New Linear Prediction Model Method for the Determination of Slow Amide Proton Exchange Rates from a Series of One-Dimensional 1H NMR Spectra
      Moss, R.,Gesmar, H.,Led, J.J.
      (1994) J.Am.Chem.Soc. 116: 747
    • Three-Dimensional Solution Structure of an Insulin Dimer. A Study of the B9(Asp) Mutant of Human Insulin Using Nuclear Magnetic Resonance Distance Geometry and Restrained Molecular Dynamics
      Jorgensen, A.M.M.,Kristensen, S.M.,Led, J.J.,Balschmidt, P.
      (1992) J.Mol.Biol. 227: 1146
    • Proton Nuclear Magnetic Resonance Study of the B9(Asp) Mutant of Human Insulin. Sequential Assignment and Secondary Structure
      Kristensen, S.M.,Jorgensen, A.M.M.,Led, J.J.,Balschmidt, P.,Hansen, F.B.
      (1991) J.Mol.Biol. 218: 221
    • A Carbon-13 NMR Study of the B9(Asp) Mutant of Human Insulin
      Kristensen, S.M.,Led, J.J.
      (1995) Magn.Reson.Chem. 33: 461
    • Slow Amide Proton Exchange Rates from the Line Widths in a Single Two-Dimensional 1H NMR Spectrum
      Olsen, H.B.,Gesmar, H.,Led, J.J.
      (1993) J.Am.Chem.Soc. 115: 1457


    Organizational Affiliation

    Department of Chemistry, University of Copenhagen, The H.C. Orsted Institute, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INSULIN
A
21Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INSULIN
B
29Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1MHJ Olderado

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
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other