ISDA

Entry Detail

PDB ID:

3VQU

Keywords:

Title:

CRYSTAL STRUCTURE OF HUMAN MPS1 CATALYTIC DOMAIN IN COMPLEX WITH 4-[(4-amino-5-cyano-6-ethoxypyridin-2- yl)amino]benzamide

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Cell-free Synthesis

PDB Version:

Deposition Date:

2012-03-30

Release Date:

2012-06-27

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.40 Å

R-Value Free:

0.28

R-Value Work:

0.24

R-Value Observed:

0.25

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Dual specificity protein kinase TTK
Chain IDs:A
Chain Length:320
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P33981 Pfam ID:PF00069 EC:2.7.12.1

Ligand Molecules

IOD

O22

Primary Citation

Diaminopyridine-based potent and selective mps1 kinase inhibitors binding to an unusual flipped-Peptide conformation.

Kusakabe, K, Ide, N, Daigo, Y, Itoh, T, Higashino, K, Okano, Y, Tadano, G, Tachibana, Y, Sato, Y, Inoue, M, Wada, T, Iguchi, M, Kanazawa, T, Ishioka, Y, Dohi, K, Tagashira, S, Kido, Y, Sakamoto, S, Yasuo, K, Maeda, M, Yamamoto, T, Higaki, M, Endoh, T, Ueda, K, Shiota, T, Murai, H, Nakamura, Y.Show

Acs Med.Chem.Lett. 3 560 564 (2012)

PMID: 24900510 DOI: 10.1021/ml3000879

Abstact

Monopolar spindle 1 (Mps1) is an attractive cancer drug target due to the important role that it plays in centrosome duplication, the spindle assembly checkpoint, and the maintenance of chromosomal stability. A design based on JNK inhibitors with an aminopyridine scaffold and subsequent modifications identified diaminopyridine 9 with an IC50 of 37 nM. The X-ray structure of 9 revealed that the Cys604 carbonyl group of the hinge region flips to form a hydrogen bond with the aniline NH group in 9. Further optimization of 9 led to 12 with improved cellular activity, suitable pharmacokinetic profiles, and good in vivo efficacy in the mouse A549 xenograft model. Moreover, 12 displayed excellent selectivity over 95 kinases, indicating the contribution of its unusual flipped-peptide conformation to its selectivity.

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Primary Citation of related structures