1K3A

Structure of the Insulin-like Growth Factor 1 Receptor Kinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and autoregulation of the insulin-like growth factor 1 receptor kinase.

Favelyukis, S.Till, J.H.Hubbard, S.R.Miller, W.T.

(2001) Nat.Struct.Mol.Biol. 8: 1058-1063

  • DOI: 10.1038/nsb721

  • PubMed Abstract: 
  • The insulin-like growth factor 1 (IGF1) receptor is closely related to the insulin receptor. However, the unique biological functions of IGF1 receptor make it a target for therapeutic intervention in human cancer. Using its isolated tyrosine kinase d ...

    The insulin-like growth factor 1 (IGF1) receptor is closely related to the insulin receptor. However, the unique biological functions of IGF1 receptor make it a target for therapeutic intervention in human cancer. Using its isolated tyrosine kinase domain, we show that the IGF1 receptor is regulated by intermolecular autophosphorylation at three sites within the kinase activation loop. Steady-state kinetic analyses of the isolated phosphorylated forms of the IGF1 receptor kinase (IGF1RK) reveal that each autophosphorylation event increases enzyme turnover number and decreases Km for ATP and peptide. We have determined the 2.1 A-resolution crystal structure of the tris-phosphorylated form of IGF1RK in complex with an ATP analog and a specific peptide substrate. The structure of IGF1RK reveals how the enzyme recognizes peptides containing hydrophobic residues at the P+1 and P+3 positions and how autophosphorylation stabilizes the activation loop in a conformation that facilitates catalysis. Although the nucleotide binding cleft is conserved between IGF1RK and the insulin receptor kinase, sequence differences in the nearby interlobe linker could potentially be exploited for anticancer drug design.


    Organizational Affiliation

    Department of Physiology and Biophysics, School of Medicine State University of New York at Stony Brook, Stony Brook, New York 11794, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
insulin-like growth factor 1 receptor
A
299Homo sapiensGene Names: IGF1R
EC: 2.7.10.1
Find proteins for P08069 (Homo sapiens)
Go to Gene View: IGF1R
Go to UniProtKB:  P08069
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
insulin receptor substrate 1
B
14Homo sapiensGene Names: IRS1
Find proteins for P35568 (Homo sapiens)
Go to Gene View: IRS1
Go to UniProtKB:  P35568
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACP
Query on ACP

Download SDF File 
Download CCD File 
A
PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
ADENOSINE-5'-[BETA, GAMMA-METHYLENE]TRIPHOSPHATE
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
A
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 80.624α = 90.00
b = 111.018β = 90.00
c = 93.297γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance