4MBJ

Human B-Raf Kinase Domain in Complex with an Imidazopyridine-based Inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.276 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Imidazo[4,5-b]pyridine inhibitors of B-Raf kinase.

Newhouse, B.J.Wenglowsky, S.Grina, J.Laird, E.R.Voegtli, W.C.Ren, L.Ahrendt, K.Buckmelter, A.Gloor, S.L.Klopfenstein, N.Rudolph, J.Wen, Z.Li, X.Feng, B.

(2013) Bioorg.Med.Chem.Lett. 23: 5896-5899

  • DOI: 10.1016/j.bmcl.2013.08.086

  • PubMed Abstract: 
  • This Letter details the synthesis and evaluation of imidazo[4,5-b]pyridines as inhibitors of B-Raf kinase. These compounds bind in a DFG-in, αC-helix out conformation of B-Raf, which is a binding mode associated with significant kinase selectivity. S ...

    This Letter details the synthesis and evaluation of imidazo[4,5-b]pyridines as inhibitors of B-Raf kinase. These compounds bind in a DFG-in, αC-helix out conformation of B-Raf, which is a binding mode associated with significant kinase selectivity. Structure-activity relationship studies involved optimization of the ATP-cleft binding region of these molecules, and led to compound 23, an inhibitor with excellent enzyme/cell potency, and kinase selectivity.


    Organizational Affiliation

    Array BioPharma Inc., 3200 Walnut Street, Boulder, CO 80301, USA. Electronic address: bnewhouse@arraybiopharma.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase B-raf
A, B
304Homo sapiensMutation(s): 0 
Gene Names: BRAF (BRAF1, RAFB1)
EC: 2.7.11.1
Find proteins for P15056 (Homo sapiens)
Go to Gene View: BRAF
Go to UniProtKB:  P15056
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DFS
Query on DFS

Download SDF File 
Download CCD File 
A, B
2,6-difluoro-N-(1H-imidazo[4,5-b]pyridin-6-yl)-3-[(propylsulfonyl)amino]benzamide
C16 H15 F2 N5 O3 S
CWDHWLRBSAIDBH-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DFSIC50: 61 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.276 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 106.970α = 90.00
b = 106.970β = 90.00
c = 152.440γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
Blu-Icedata collection
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-08-19 
  • Released Date: 2013-10-02 
  • Deposition Author(s): Voegtli, W.C.

Revision History 

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2013-11-06
    Type: Database references