title: Mevalonate pyrophosphate decarboxylase is predominantly located in the cytosol of rat hepatocytes.
abstract: Mevalonate pyrophosphate decarboxylase (MPD) is found in the 100000 x g supernatant fraction of cells or tissues and is considered to be a cytosolic protein. Recently, other groups reported that MPD is mostly located in the peroxisomes. In this study, we used two different methods to determine whether MPD is predominantly located in the peroxisomes or the cytosol of rat hepatocytes. 1) In permeabilized rat hepatocytes or normal rat kidney cells treated with digitonin, which lack cytosolic enzyme, MPD was mainly present in the medium. 2) Double immunofluorescent labeling of cells with both anti-MPD antibody and anti-hexokinase antibody yielded an immunofluorescent pattern for both enzymes typical of the cytosolic protein. These results indicate that MPD is predominantly located in the cytosol of rat hepatocytes.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Hiroshima, Japan. mitihara@fupharm.fukuyama-u.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Michihara
authors.forename: M
authors.initials: M
authors.lastname: Sawamura
authors.forename: Y
authors.initials: Y
authors.lastname: Yamori
authors.forename: K
authors.initials: K
authors.lastname: Akasaki
authors.forename: H
authors.initials: H
authors.lastname: Tsuji
mesh_terms: D000818:Animals; D002262:Carboxy-Lyases / Q000032:analysis* / Q000378:metabolism; D002460:Cell Line; D002463:Cell Membrane Permeability; D002478:Cells, Cultured; D003600:Cytosol / Q000201:enzymology* / Q000378:metabolism; D004789:Enzyme Activation; D022781:Hepatocytes / Q000201:enzymology* / Q000378:metabolism; D007668:Kidney / Q000166:cytology / Q000378:metabolism; D008297:Male; D008856:Microscopy, Fluorescence; D051381:Rats; D017208:Rats, Wistar
chemical_list: D002262:Carboxy-Lyases; C022503:pyrophosphomevalonate decarboxylase