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Molly M. He,1
Annemarie Stroustrup Smith,2
Johan D. Oslob,1
William M. Flanagan,1
Andrew C. Braisted,1
Adrian Whitty,3
Mark T. Cancilla,1
Jun Wang,4
Alexey A. Lugovskoy,3
Josh C. Yoburn,1
Amy D. Fung,1
Graham Farrington,3
John K. Eldredge,3
Eric S. Day,3
Leslie A. Cruz,5
Teresa G. Cachero,3
Stephan K. Miller,3
Jessica E. Friedman,3
Ingrid C. Choong,1
Brian C. Cunningham1*
Abstract:
We have identified a small-molecule inhibitor of tumor necrosisfactor (TNF-) that promotes subunit disassembly of this trimericcytokine family member. The compound inhibits TNF- activityin biochemical and cell-based assays with median inhibitoryconcentrations of 22 and 4.6 micromolar, respectively. Formationof an intermediate complex between the compound and the intacttrimer results in a 600-fold accelerated subunit dissociationrate that leads to trimer dissociation. A structure solved byx-ray crystallography reveals that a single compound moleculedisplaces a subunit of the trimer to form a complex with a dimerof TNF- subunits.
1 Sunesis Pharmaceuticals, Incorporated, 341 Oyster Point Boulevard, South San Francisco, CA 94080, USA. 2 Kravis Children's Hospital, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1198, New York, NY 10029, USA. 3 Department of Drug Discovery, BiogenIdec, 14 Cambridge Center, Cambridge, MA 02142, USA. 4 Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 021394307, USA. 5 Chemistry and Chemical Biology Program, University of California, San Francisco, 600 16th Street, Box 2280, San Francisco, CA 94143, USA.
* To whom correspondence should be addressed. E-mail: bcc{at}sunesis.com
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