Journal
SCIENCE
Volume 310, Issue 5750, Pages 1022-1025Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1116304
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We have identified a small-molecule inhibitor of tumor necrosis factor a (TNF-alpha) that promotes subunit disassembly of this trimeric cytokine family member. The compound inhibits TNF-alpha activity in biochemical and cell-based assays with median inhibitory concentrations of 22 and 4.6 micromolar, respectively. Formation of an intermediate complex between the compound and the intact trimer results in a 600-fold accelerated subunit dissociation rate that leads to trimer dissociation. A structure solved by x-ray crystallography reveals that a single compound molecule displaces a subunit of the trimer to form a complex with a dimer of TNF-alpha subunits.
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