ISDA

Deposition Date 2007-07-02

Release Date 2008-03-18

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2QHN

Keywords:

TRANSFERASE

Title:

Crystal Structure of Chek1 in Complex with Inhibitor 1a

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Spodoptera frugiperda

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.70 Å

R-Value Free:

0.22

R-Value Work:

0.20

R-Value Observed:

0.20

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

582

Primary Citation

Optimization of a pyrazoloquinolinone class of Chk1 kinase inhibitors.

Brnardic, E.J, Garbaccio, R.M, Fraley, M.E, Tasber, E.S, Steen, J.T, Arrington, K.L, Dudkin, V.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. 17 5989 5994 (2007)

PMID: 17804227 DOI: 10.1016/j.bmcl.2007.07.051

Abstact

The development of 2,5-dihydro-4H-pyrazolo[4,3-c]quinolin-4-ones as inhibitors of Chk1 kinase is described. Introduction of a fused ring at the C7/C8 positions of the pyrazoloquinolinone provided an increase in potency while guidance from overlapping inhibitor bound Chk1 X-ray crystal structures contributed to the discovery of a potent and solubilizing propyl amine moiety in compound 52 (Chk1 IC(50)=3.1 nM).

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Primary Citation of related structures