4XLV

Crystal structure of the activated insulin receptor tyrosine kinase dimer

  • Classification: TRANSFERASE
  • Organism(s): Homo sapiens
  • Expression System: Spodoptera frugiperda
  • Mutation(s): 

  • Deposited: 2015-01-13 Released: 2015-03-25 
  • Deposition Author(s): Hubbard, S.R., Li, S.
  • Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The insulin and IGF1 receptor kinase domains are functional dimers in the activated state.

Cabail, M.Z.Li, S.Lemmon, E.Bowen, M.E.Hubbard, S.R.Miller, W.T.

(2015) Nat Commun 6: 6406-6406

  • DOI: 10.1038/ncomms7406

  • PubMed Abstract: 
  • The insulin receptor (IR) and insulin-like growth factor-1 receptor (IGF1R) are highly related receptor tyrosine kinases with a disulfide-linked homodimeric architecture. Ligand binding to the receptor ectodomain triggers tyrosine autophosphorylation ...

    The insulin receptor (IR) and insulin-like growth factor-1 receptor (IGF1R) are highly related receptor tyrosine kinases with a disulfide-linked homodimeric architecture. Ligand binding to the receptor ectodomain triggers tyrosine autophosphorylation of the cytoplasmic domains, which stimulates catalytic activity and creates recruitment sites for downstream signalling proteins. Whether the two phosphorylated tyrosine kinase domains within the receptor dimer function independently or cooperatively to phosphorylate protein substrates is not known. Here we provide crystallographic, biophysical and biochemical evidence demonstrating that the phosphorylated kinase domains of IR and IGF1R form a specific dimeric arrangement involving an exchange of the juxtamembrane region proximal to the kinase domain. In this dimer, the active position of α-helix C in the kinase N lobe is stabilized, which promotes downstream substrate phosphorylation. These studies afford a novel strategy for the design of small-molecule IR agonists as potential therapeutic agents for type 2 diabetes.


    Organizational Affiliation

    Department of Physiology and Biophysics, Stony Brook University, Stony Brook, New York 11794, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin receptor
A
328Homo sapiensMutation(s): 2 
Gene Names: INSR
EC: 2.7.10.1
Find proteins for P06213 (Homo sapiens)
Go to Gene View: INSR
Go to UniProtKB:  P06213
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
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: 2.3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.204 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 66.982α = 90.00
b = 66.982β = 90.00
c = 136.580γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-01-13 
  • Released Date: 2015-03-25 
  • Deposition Author(s): Hubbard, S.R., Li, S.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney DiseaseUnited StatesDK052916

Revision History 

  • Version 1.0: 2015-03-25
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Derived calculations, Source and taxonomy