Abstract
Lactate dehydrogenase A (LDHA) is a key enzyme in Warburg's effect, a characteristic of cancer cells. LDHA is a target of anticancer agents that inhibit the metabolism of cancer cells. Gossypol is a known cancer therapeutic agent that inhibits LDHA by competitive inhibition. However, the mechanisms of inhibition of LDHA by gossypol is unknown. Here, we elucidate the binding of gossypol and LDHA using biochemical and biophysical methods. The crystal structure of the complex between LDHA and gossypol is presented. The binding of gossypol affects LDHA activity by a conformational change in the active-site loop.Our research contributes to the structural insight into LDHA with gossypol and approaches gossypol as a novel therapeutic candidate targeting the metabolic pathways for cancer cells.
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