ISDA

Deposition Date 2013-08-19

Release Date 2013-10-02

Last Version Date 2024-02-28

Entry Detail

PDB ID:

4MBJ

Keywords:

TRANSFERASE/TRANSFERASE INHIBITOR

Title:

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

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Trichoplusia ni

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.60 Å

R-Value Free:

0.32

R-Value Work:

0.27

R-Value Observed:

0.27

Space Group:

P 41 21 2

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Serine/threonine-protein kinase B-raf
Gene (Uniprot):BRAF
Chain IDs:A, B
Chain Length:304
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P15056 Pfam ID:PF07714 EC:2.7.10.2

Ligand Molecules

DFS

Primary Citation

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.Show

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

PMID: 24042006 DOI: 10.1016/j.bmcl.2013.08.086

Abstact

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.

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Primary Citation of related structures