ISDA

Deposition Date 2007-04-21

Release Date 2007-05-08

Last Version Date 2024-03-13

Entry Detail

PDB ID:

2YWP

Keywords:

TRANSFERASE

Title:

Crystal Structure of CHK1 with a Urea Inhibitor

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Free:

0.29

R-Value Work:

0.21

R-Value Observed:

0.24

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:269
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O14757 Pfam ID:PF00069 EC:2.7.11.1

Ligand Molecules

A42

Primary Citation

Synthesis and biological evaluation of 1-(2,4,5-trisubstituted phenyl)-3-(5-cyanopyrazin-2-yl)ureas as potent Chk1 kinase inhibitors

Li, G, Hasvold, L.A, Tao, Z.-F, Wang, G.T, Gwaltney II, S.L, Patel, J, Kovar, P, Credo, R.B, Chen, Z, Zhang, H, Park, C, Sham, H.L, Sowin, T, Rosenberg, S.H, Lin, N.-H.Show

Bioorg.Med.Chem.Lett. 16 2293 2298 (2006)

PMID: 16446090 DOI: 10.1016/j.bmcl.2006.01.028

Abstact

Based on the X-ray crystallography of our lead compound 1-(5-chloro-2,4-dimethoxyphenyl)-3-(5-cyanopyrazin-2-yl)urea in the checkpoint kinase 1 (Chk1) enzyme, we modified R4, and to a lesser extent, R2, and R5 of the phenyl ring, and made a variety of N-aryl-N'-pyrazinylurea Chk1 inhibitors. Enzymatic activity less than 20 nM was observed in 15 of 41 compounds. Compound 8i provided the best overall results in the cellular assays as it abrogated doxorubicin-induced cell cycle arrest (IC50=1.7 microM) and enhanced doxorubicin cytotoxicity (IC50=0.44 microM) while displaying no single agent activity.

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Primary Citation of related structures