5TOB image
Entry Detail
PDB ID:
5TOB
Title:
Selectivity switch between FAK and Pyk2: Macrocyclization of FAK inhibitors improves Pyk2 potency
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2016-10-17
Release Date:
2017-11-29
Method Details:
Experimental Method:
Resolution:
2.12 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Protein-tyrosine kinase 2-beta
Chain IDs:A
Chain Length:282
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Selectivity switch between FAK and Pyk2: Macrocyclization of FAK inhibitors improves Pyk2 potency.
Bioorg. Med. Chem. Lett. 26 5926 5930 (2016)
PMID: 27876318 DOI: 10.1016/j.bmcl.2016.10.092

Abstact

Herein, we describe the synthesis of Pyk2 inhibitors via macrocyclization of FAK and dual Pyk2-FAK inhibitors. We identified macrocycle 25a as a highly potent Pyk2 inhibitor (IC50=0.7nM), with ∼175-fold improvement in Pyk2 potency as compared to its acyclic counterpart. In many cases, macrocyclization improved Pyk2 potency while weakening FAK potency, thereby improving the Pyk2/FAK selectivity ratio for this structural class of inhibitors. Various macrocyclic linkers were studied in an attempt to optimize Pyk2 selectivity. We observed macrocyclic atropisomerism during the synthesis of 19-membered macrocycles 10a-d, and successfully obtained crystallographic evidence of one atropisomer (10a-AtropB) preferentially bound to Pyk2.

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