Abstract

We previously reported that the CP diet (a diet containing 5% cholestyramine and 0.1% pravastatin)-induced new species of 37-kDa mevalonate pyrophosphate decarboxylase (MPD) was characteristically and immunologically very similar to the well-known 45-kDa MPD. In the present study, we found a difference in subcellular distribution between 45- and 37-kDa MPD by cell fractionation and immunoblot analysis. The cytosol fraction contained 45- and 37-kDa MPD. Peroxisomal fraction contained a small amount of 45-kDa MPD, but not 37-kDa MPD. Also, 45-kDa MPD in peroxisome is localized in the matrix. From these data, the difference in subcellular distribution between 45- and 37-kDa MPD may be due to differences in the physiological role of cholesterol biosynthesis in rat liver.

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