1ZT5

C-terminal domain of Insulin-like Growth Factor Binding Protein-1 isolated from human amniotic fluid complexed with Iron(II)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.818 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Properties of the C-terminal Domain of Insulin-like Growth Factor-binding Protein-1 Isolated from Human Amniotic Fluid

Sala, A.Capaldi, S.Campagnoli, M.Faggion, B.Labo, S.Perduca, M.Romano, A.Carrizo, M.E.Valli, M.Visai, L.Minchiotti, L.Galliano, M.Monaco, H.L.

(2005) J.Biol.Chem. 280: 29812-29819

  • DOI: 10.1074/jbc.M504304200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Insulin-like growth factor (IGF)-binding protein-1 (IGFBP-1) regulates the activity of the insulin-like growth factors in early pregnancy and is, thus, thought to play a key role at the fetal-maternal interface. The C-terminal domain of IGFBP-1 and t ...

    Insulin-like growth factor (IGF)-binding protein-1 (IGFBP-1) regulates the activity of the insulin-like growth factors in early pregnancy and is, thus, thought to play a key role at the fetal-maternal interface. The C-terminal domain of IGFBP-1 and three isoforms of the intact protein were isolated from human amniotic fluid, and sequencing of the four N-terminal polypeptide chains showed them to be highly pure. The addition of both intact IGFBP-1 and its C-terminal fragment to cultured fibroblasts has a similar stimulating effect on cell migration, and therefore, the domain has a biological activity on its own. The three-dimensional structure of the C-terminal domain was determined by x-ray crystallography to 1.8 Angstroms resolution. The fragment folds as a thyroglobulin type I domain and was found to bind the Fe(2+) ion in the crystals through the only histidine residue present in the polypeptide chain. Iron (II) decreases the binding of intact IGFBP-1 and the C-terminal domain to IGF-II, suggesting that the metal binding site is close to or part of the surface of interaction of the two molecules.


    Organizational Affiliation

    Department of Biochemistry A. Castellani, University of Pavia, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin-like growth factor binding protein 1
A
80Homo sapiensMutation(s): 0 
Gene Names: IGFBP1 (IBP1)
Find proteins for P08833 (Homo sapiens)
Go to Gene View: IGFBP1
Go to UniProtKB:  P08833
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE2
Query on FE2

Download SDF File 
Download CCD File 
A
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
DIO
Query on DIO

Download SDF File 
Download CCD File 
A
1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.818 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 38.210α = 90.00
b = 59.600β = 90.00
c = 31.060γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
CCP4data scaling
XFITdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance