1XDA

STRUCTURE OF INSULIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a prolonged-acting insulin with albumin-binding properties.

Whittingham, J.L.Havelund, S.Jonassen, I.

(1997) Biochemistry 36: 2826-2831

  • DOI: 10.1021/bi9625105

  • PubMed Abstract: 
  • The fatty acid acylated insulin, Lys(B29)-tetradecanoyl, des-(B30) human insulin, has been crystallized and the structure determined by X-ray crystallography. The fatty acid substituent on residue B29 Lys binds reversibly to circulating albumin prote ...

    The fatty acid acylated insulin, Lys(B29)-tetradecanoyl, des-(B30) human insulin, has been crystallized and the structure determined by X-ray crystallography. The fatty acid substituent on residue B29 Lys binds reversibly to circulating albumin protein in vivo, and by this mechanism the hormone's action is prolonged. Crystals of the fatty acid insulin grow in space group R3, with two dimers in the asymmetric unit, and diffract to 1.8 A spacing. The structure has been solved by molecular replacement and refined using a maximum likelihood method. The crystal structure consists of R6 zinc insulin hexamers which contain phenol. The fatty acids can be seen bound between the hexamers, making specific interactions with the side chains of residue B1 Phe; however, the lysine side chains to which the fatty acids are covalently attached are mostly disordered. The mode of binding of the fatty acids appears to be determined by crystal packing, and whether or not they interact with the protein in this way in solution remains uncertain.


    Related Citations: 
    • Soluble, Fatty Acid Acylated Insulins Bind to Albumin and Show Protracted Action in Pigs
      Markussen, J.,Havelund, S.,Kurtzhals, P.,Andersen, A.S.,Halstrom, J.,Hasselager, E.,Larsen, U.D.,Ribel, U.,Schaffer, L.,Vad, K.,Jonassen, I.
      (1996) Diabetologia 39: 281
    • The Structure of a Rhombohedral R6 Insulin Hexamer that Binds Phenol
      Smith, G.D.,Dodson, G.G.
      (1992) Biopolymers 32: 441


    Organizational Affiliation

    Department of Chemistry, University of York, Heslington, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FATTY ACID ACYLATED INSULIN
A, C, E, G
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
FATTY ACID ACYLATED INSULIN
B, D, F, H
29Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MYR
Query on MYR

Download SDF File 
Download CCD File 
B, D, F, H
MYRISTIC ACID
C14 H28 O2
TUNFSRHWOTWDNC-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
B, D, F, H
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
B, D, F, H
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
IPH
Query on IPH

Download SDF File 
Download CCD File 
A, C, E, G
PHENOL
C6 H6 O
ISWSIDIOOBJBQZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.174 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 78.752α = 90.00
b = 78.752β = 90.00
c = 79.199γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
AMoREphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance