3Q4C

Crystal Structure of Wild Type BRAF kinase domain in complex with organometallic inhibitor CNS292

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

The crystal structure of BRAF in complex with an organoruthenium inhibitor reveals a mechanism for inhibition of an active form of BRAF kinase.

Xie, P., Streu, C., Qin, J., Bregman, H., Pagano, N., Meggers, E., Marmorstein, R.

(2009) Biochemistry 48: 5187-5198

  • DOI: 10.1021/bi802067u

  • PubMed Abstract: 

    • Substitution mutations in the BRAF serine/threonine kinase are found in a variety of human cancers. Such mutations occur in approximately 70% of human malignant melanomas, and a single hyperactivating V600E mutation is found in the activation segment ...

    Substitution mutations in the BRAF serine/threonine kinase are found in a variety of human cancers. Such mutations occur in approximately 70% of human malignant melanomas, and a single hyperactivating V600E mutation is found in the activation segment of the kinase domain and accounts for more than 90% of these mutations. Given this correlation, the molecular mechanism for BRAF regulation as well as oncogenic activation has attracted considerable interest, and activated forms of BRAF, such as BRAF(V600E), have become attractive targets for small molecule inhibition. Here we report on the identification and subsequent optimization of a potent BRAF inhibitor, CS292, based on an organometallic kinase inhibitor scaffold. A cocrystal structure of CS292 in complex with the BRAF kinase domain reveals that CS292 binds to the ATP binding pocket of the kinase and is an ATP competitive inhibitor. The structure of the kinase-inhibitor complex also demonstrates that CS292 binds to BRAF in an active conformation and suggests a mechanism for regulation of BRAF by phosphorylation and BRAF(V600E) oncogene-induced activation. The structure of CS292 bound to the active form of the BRAF kinase also provides a novel scaffold for the design of BRAF(V600E) oncogene selective BRAF inhibitors for therapeutic application.

    Organizational Affiliation: 

    The Wistar Institute, Philadelphia, Pennsylvania 19104-6323, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase B-raf
A, B
307Homo 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
RSW
Query on RSW
Download SDF File 
Download CCD File 
A
[(1,2,3,4,5,6-eta)-(1S,2R,3R,4R,5S,6S)-1-carboxycyclohexane-1,2,3,4,5,6-hexayl](chloro)(3-methyl-5,7-dioxo-6,7-dihydro-5H-pyrido[2,3-a]pyrrolo[3,4-c]carbazol-12-ide-kappa~2~N~1~,N~12~)ruthenium(1+)
C25 H16 Cl N3 O4 Ru
LOEHCDRAMDJWEG-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RSWIC50: 370 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.232 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 94.905α = 90.00
b = 94.905β = 90.00
c = 163.349γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction
MOLREPphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance