ISDA

Deposition Date 2007-08-21

Release Date 2007-10-30

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2R0U

Keywords:

TRANSFERASE

Title:

Crystal Structure of Chek1 in Complex with Inhibitor 54

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Spodoptera frugiperda

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.21

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Serine/threonine-protein kinase Chk1
Gene (Uniprot):CHEK1
Chain IDs:A
Chain Length:323
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O14757 Pfam ID:PF00069 EC:2.7.11.1

Ligand Molecules

M54

Primary Citation

Synthesis and evaluation of substituted benzoisoquinolinones as potent inhibitors of Chk1 kinase.

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

Bioorg.Med.Chem.Lett. 17 6280 6285 (2007)

PMID: 17900896 DOI: 10.1016/j.bmcl.2007.09.007

Abstact

From HTS lead 1, a novel benzoisoquinolinone class of ATP-competitive Chk1 inhibitors was devised and synthesized via a photochemical route. Using X-ray crystallography as a guide, potency was rapidly enhanced through the installation of a tethered basic amine designed to interact with an acidic residue (Glu91) in the enzyme pocket. Further SAR was explored at the solvent front and near to the H1 pocket and resulted in the discovery of low MW, sub-nanomolar inhibitors of Chk1.

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Primary Citation of related structures