Abstract
Tumor metastasis is the primary cause of death of cancer patients. Development of new therapeutics preventing tumor metastasis is urgently needed. Migrastatin is a natural product secreted by Streptomyces 1,2, and synthesized migrastatin analogues are potent inhibitors of metastatic tumor cell migration, invasion and tumor metastasis 3–6. Here we show that these migrastatin analogues target the actin-bundling protein fascin to inhibit its activity. X-ray crystal structural studies reveal that migrastatin analogues bind to one of the actin-binding sites on fascin. Our data demonstrate that actin cytoskeletal proteins, such as fascin, can be explored as new molecular targets for cancer treatment, similar to the microtubule protein tubulin.
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