4E7T

The structure of T6 bovine insulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structures of T(6), T(3)R(3) and R(6) bovine insulin: combining X-ray diffraction and absorption spectroscopy.

Frankar, C.G.Knudsen, M.V.Noren, K.Nazarenko, E.Stahl, K.Harris, P.

(2012) Acta Crystallogr.,Sect.D 68: 1259-1271

  • DOI: 10.1107/S090744491202625X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The crystal structures of three conformations, T(6), T(3)R(3) and R(6), of bovine insulin were solved at 1.40, 1.30 and 1.80 Å resolution, respectively. All conformations crystallized in space group R3. In contrast to the T(6) and T(3)R(3) structures ...

    The crystal structures of three conformations, T(6), T(3)R(3) and R(6), of bovine insulin were solved at 1.40, 1.30 and 1.80 Å resolution, respectively. All conformations crystallized in space group R3. In contrast to the T(6) and T(3)R(3) structures, different conformations of the N-terminal B-chain residue PheB1 were observed in the R(6) insulin structure, resulting in an eightfold doubling of the unit-cell volume upon cooling. The zinc coordination in each conformation was studied by X-ray absorption spectroscopy (XAS), including both EXAFS and XANES. Zinc adopts a tetrahedral coordination in all R(3) sites and an octahedral coordination in T(3) sites. The coordination distances were refined from XAS with a standard deviation of <0.01 Å. In contrast to the distances determined from the medium-resolution crystal structures, the XAS results were in good agreement with similar coordination geometries found in small molecules, as well as in other high-resolution insulin structures. As the radiation dose for XRD experiments is two orders of magnitude higher compared with that of XAS experiments, the single crystals were exposed to a higher degree of radiation damage that affected the zinc coordination in the T(3) sites in particular. Furthermore, XANES spectra for the zinc sites in T(6) and R(6) insulin were successfully calculated using finite difference methods and the bond distances and angles were optimized from a quantitative XANES analysis.


    Organizational Affiliation

    Department of Chemistry, Technical University of Denmark, Kemitorvet B207, 2800 Kgs. Lyngby, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin A chain
A, C
21Bos taurusMutation(s): 0 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin B chain
B, D
30Bos taurusMutation(s): 0 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 80.980α = 90.00
b = 80.980β = 90.00
c = 33.490γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
XDSdata reduction
PHENIXrefinement
MAR345dtbdata collection
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-10-03
    Type: Database references
  • Version 1.2: 2018-03-07
    Type: Data collection