Abstract:
:Anaplastic lymphoma kinase (ALK) is a valid target for anticancer therapy; however, potent ALK inhibitors suitable for clinical use are lacking. Because the majority of described kinase inhibitors bind in the ATP pocket of the kinase domain, we have characterized this pocket in ALK using site-directed mutagenesis, inhibition studies, and molecular modeling. Mutation of the gatekeeper residue, a key structural determinant influencing inhibitor binding, rendered the fusion protein, NPM/ALK, sensitive to inhibition by SKI-606 in the nanomolar range, while PD173955 inhibited the NPM/ALK mutant at micromolar concentrations. In contrast, both wild type and mutant NPM/ALK were insensitive to imatinib. Computer modeling indicated that docking solutions obtained with a homology model representing the intermediate conformation of the ALK kinase domain reflected closely experimental data. The good agreement between experimental and virtual results indicate that the ALK molecular models described here are useful tools for the rational design of ALK selective inhibitors. In addition, 4-phenylamino-quinoline compounds may have potential as templates for ALK inhibitors.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Gunby RH,Ahmed S,Sottocornola R,Gasser M,Redaelli S,Mologni L,Tartari CJ,Belloni V,Gambacorti-Passerini C,Scapozza Ldoi
10.1021/jm060380ksubject
Has Abstractpub_date
2006-09-21 00:00:00pages
5759-68issue
19eissn
0022-2623issn
1520-4804journal_volume
49pub_type
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