3FUR

Crystal Structure of PPARg in complex with INT131


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

INT131: a selective modulator of PPAR gamma.

Motani, A.Wang, Z.Weiszmann, J.McGee, L.R.Lee, G.Liu, Q.Staunton, J.Fang, Z.Fuentes, H.Lindstrom, M.Liu, J.Biermann, D.H.Jaen, J.Walker, N.P.Learned, R.M.Chen, J.L.Li, Y.

(2009) J Mol Biol 386: 1301-1311

  • DOI: 10.1016/j.jmb.2009.01.025
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The nuclear hormone receptor peroxisome proliferator-activated receptor gamma (PPAR gamma; NR1C3) plays a central role in adipogenesis and is the molecular target of the thiazolidinedione class of antidiabetic drugs. To overcome the well-known shortc ...

    The nuclear hormone receptor peroxisome proliferator-activated receptor gamma (PPAR gamma; NR1C3) plays a central role in adipogenesis and is the molecular target of the thiazolidinedione class of antidiabetic drugs. To overcome the well-known shortcomings of thiazolidinediones, we have identified INT131 (formerly T131 and AMG131) as a potent selective ligand for PPAR gamma that is structurally and pharmacologically distinct from glitazone agonists. In vitro biochemical and cell-based functional assays showed that INT131 mediates a distinct pattern of coregulator recruitment to PPAR gamma. In adipocytes, INT131 showed minimal stimulation of adipocyte differentiation and partially activated PPAR gamma target genes involved in adipogenesis and, at the same time, showed more agonistic activity on another set of target genes that may influence insulin sensitivity directly. These unique properties of INT131 may provide a mechanistic basis for its distinct pharmacological profile. In vivo, increases in glucose tolerance were observed in Zucker (fa/fa) rats following a 14-day oral treatment with INT131. Although the maximal efficacies of INT131 and rosiglitazone were similar with respect to improvements in glucose tolerance, INT131 had less effect on heart and lung weights, weight gain, hemodilution, and plasma volume. Thus, INT131 appears to selectively modulate PPAR gamma responses in an in vivo preclinical model, showing antidiabetic efficacy while exhibiting an improved hemodynamic and cardiovascular adverse effect profile compared to the full agonist rosiglitazone. X-ray crystallography revealed that INT131 interacts with PPAR gamma through a distinct binding mode, forming primarily hydrophobic contacts with the ligand-binding pocket without direct hydrogen-bonding interactions to key residues in helix 12 that are characteristic of full agonists. Mutagenesis studies on Tyr473 in helix 12 demonstrated this residue as essential for rosiglitazone-induced receptor activation, but nonessential for INT131 function in vitro, providing one possible molecular determinant for INT131's distinct pharmacology. INT131 is currently being evaluated in a clinical setting as a therapeutic agent for the treatment of type 2 diabetes.


    Organizational Affiliation

    Amgen, Inc., 1120 Veterans Boulevard, South San Francisco, CA 94080, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peroxisome proliferator-activated receptor gamma
A
272Homo sapiensMutation(s): 0 
Gene Names: PPARgammaPPARGNR1C3
Find proteins for P37231 (Homo sapiens)
Go to UniProtKB:  P37231
NIH Common Fund Data Resources
PHAROS  P37231
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 1
H
12synthetic constructMutation(s): 0 
EC: 2.3.1.48
Find proteins for Q15788 (Homo sapiens)
Go to UniProtKB:  Q15788
NIH Common Fund Data Resources
PHAROS  Q15788
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Z12
Query on Z12

Download CCD File 
A
2,4-dichloro-N-[3,5-dichloro-4-(quinolin-3-yloxy)phenyl]benzenesulfonamide
C21 H12 Cl4 N2 O3 S
NMRWDFUZLLQSBN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
Z12IC50:  17   nM  BindingDB
Z12Ki:  10   nM  BindingDB
Z12EC50:  4   nM  BindingDB
Z12Ki :  10   nM  PDBBind
Z12EC50:  150   nM  BindingDB
Z12EC50:  170   nM  BindingDB
Z12Ki:  10   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.995α = 90
b = 68.074β = 90
c = 86.956γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2019-10-16
    Changes: Data collection, Database references, Source and taxonomy