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Mitochondrial trifunctional protein (MTP) is a protein attached to the inner mitochondrial membrane which catalyzes three out of the four steps in beta oxidation. MTP is hetero-octamer composed of four alpha and four beta subunits: * HADHA * HADHB The three functions are long-chain 3-hydroxy acyl-coenzyme A dehydrogenase, 2-enoyl coenzyme A (CoA) hydratase, and long-chain 3-ketoacyl CoA thiolase. ==Association with the Electron Transport Chain== Fatty acid beta-oxidation (FAO) and oxidative phosphorylation (OXPHOS) are two major metabolism pathways in the mitochondria. Reducing equivalents from FAO enter OXPHOS at the level of Complexes I and III. In 2010, Wang et al. discovered a functional and physical association between MTP and ETC respirasomes. Not only does MTP appear to be bound to Complex I, but it also appears to channel substrates between the two enzymes. This is especially interesting, because up until then it was unknown exactly how MTP was associated with the inner mitochondrial membrane, and this discovery may provide the explanation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「mitochondrial trifunctional protein」の詳細全文を読む スポンサード リンク
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