Abstract
Deleted in liver cancer 2 (DLC2) is a candidate tumor suppressor frequently found to be deleted in hepatocellular carcinoma. In this study, we determined the subcellular localization of DLC2. Co-localization and biochemical fractionation studies revealed that DLC2 localized to mitochondria. In addition, the DLC2-containing cytoplasmic speckles were in proximity to lipid droplets. A DLC2 mutant containing the steroidogenic acute regulatory protein-related lipid transfer (START) domain only showed a localization pattern identical to that of DLC2. Taken together, we have provided the first evidence for mitochondrial localization of DLC2 through the START domain. These findings might have implications in liver physiology and carcinogenesis.
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