Crystal Structure of Unactivated APO Insulin-like Growth Factor-1 Receptor Kinase Domain

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.229 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Crystal structure of the Apo, unactivated insulin-like growth factor-1 receptor kinase. Implication for inhibitor specificity.

Munshi, S.Kornienko, M.Hall, D.L.Reid, J.C.Waxman, L.Stirdivant, S.M.Darke, P.L.Kuo, L.C.

(2002) J Biol Chem 277: 38797-38802

  • DOI: https://doi.org/10.1074/jbc.M205580200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The x-ray structure of the unactivated kinase domain of insulin-like growth factor-1 receptor (IGFRK-0P) is reported here at 2.7 A resolution. IGFRK-0P is composed of two lobes connected by a hinge region. The N-terminal lobe of the kinase is a twisted beta-sheet flanked by a single helix, and the C-terminal lobe comprises eight alpha-helices and four short beta-strands. The ATP binding pocket and the catalytic center reside at the interface of the two lobes. Despite the overall similarity to other receptor tyrosine kinases, three notable conformational modifications are observed: 1) this kinase adopts a more closed structure, with its two lobes rotated further toward each other; 2) the conformation of the proximal end of the activation loop (residues 1121-1129) is different; 3) the orientation of the nucleotide-binding loop is altered. Collectively, these alterations lead to a different ATP-binding pocket that might impact on inhibitor designs for IGFRK-0P. Two molecules of IGFRK-0P are seen in the asymmetric unit; they are associated as a dimer with their ATP binding clefts facing each other. The ordered N terminus of one monomer approaches the active site of the other, suggesting that the juxtamembrane region of one molecule could come into close proximity to the active site of the other.

  • Organizational Affiliation

    Department of Structural Biology, Merck Research Laboratories, West Point, Pennsylvania 19486, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin-like growth factor I receptor
A, B
322Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P08069 (Homo sapiens)
Explore P08069 
Go to UniProtKB:  P08069
GTEx:  ENSG00000140443 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08069
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.88α = 90
b = 78.06β = 99.17
c = 78.97γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-07
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references