ISDA

Entry Detail

PDB ID:

2HOG

Keywords:

TRANSFERASE

Title:

crystal structure of Chek1 in complex with inhibitor 20

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Spodoptera frugiperda

PDB Version:

Deposition Date:

2006-07-14

Release Date:

2007-04-24

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.23

R-Value Work:

0.20

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Serine/threonine-protein kinase Chk1
Chain IDs:A
Chain Length:322
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O14757 Pfam ID:PF00069 EC:2.7.11.1

Ligand Molecules

710

Primary Citation

3-(Indol-2-yl)indazoles as Chek1 kinase inhibitors: Optimization of potency and selectivity via substitution at C6.

Fraley, M.E, Steen, J.T, Brnardic, E.J, Arrington, K.L, Spencer, K.L, Hanney, B.A, Kim, Y, Hartman, G.D, Stirdivant, S.M, Drakas, B.A, Rickert, K, Walsh, E.S, Hamilton, K, Buser, C.A, Hardwick, J, Tao, W, Beck, S.C, Mao, X, Lobell, R.B, Sepp-Lorenzino, L, Yan, Y, Ikuta, M, Munshi, S.K, Kuo, L.C, Kreatsoulas, C.Show

Bioorg.Med.Chem.Lett. 16 6049 6053 (2006)

PMID: 16978863 DOI: 10.1016/j.bmcl.2006.08.118

Abstact

The development of 3-(indol-2-yl)indazoles as inhibitors of Chek1 kinase is described. Introduction of amides and heteroaryl groups at the C6 position of the indazole ring system provided sufficient Chek1 potency and selectivity over Cdk7 to permit escape from DNA damage-induced arrest in a cellular assay. Enzyme potency against Chek1 was optimized by the incorporation of a hydroxymethyl triazole moiety in compound 21 (Chek1 IC(50)=0.30nM) that was shown by X-ray crystallography to displace one of three highly conserved water molecules in the HI region of the ATP-binding cleft.

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Primary Citation of related structures