Cytidine-5'-diphosphate-1,2-diacyl-sn-glycerol import into mitochondria through mitochondrial membrane contact sites in permeabilized rat liver hepatocytes.
The location of cytidine-5'-diphosphate-1,2-diacylsn-glycerol import into mictochondria was examined in permeabilized rat liver hepatocytes. The model utilized the ability of intact mitochondria to freely import [14C]glycerol-3-phosphate. Import of cytidine-5'-diphosphate-1,2-diacyl-sn-glycerol was measured by the synthesis of phosphatidyl[14C]glycerol. Phosphatidyl [14C]glycerol was synthesized in a time- and concentration-dependent manner in the presence of cytidine-5'-diphosphate-1,2-diacyl-sn-glycerol. The presence of ATP in the incubations stimulated phosphatidyl[14C]glycerol formation. The presence of adriamycin, at concentrations that block import of proteins into mitochondria, inhibited the formation of phosphatidyl [14C]glycerol. In addition, adriamycin, inhibited in vitro biosynthesis of phosphatidyl[14C]glycerol in mitochondrial but not microsomal fractions. 1,4-Dinitrophenol, which may decrease the number of mitochondrial inner and outer membrane contact sites, inhibited formation of phosphatidyl[14C]glycerol in permeabilized hepatocytes. The results demonstrate that cytidine-5'-diphosphate-1,2-diacyl-sn-glycerol may be imported into mitochondria through inner and outer mitochondrial membrane contact sites in hepatocytes.
Xu
F Y
FY
Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, Canada.
Hatch
G M
GM
D000818:Animals; D001665:Binding Sites; D001692:Biological Transport; D007425:Intracellular Membranes / Q000378:metabolism; D008930:Mitochondria, Liver / Q000378:metabolism*; D009702:Nucleoside Diphosphate Sugars / Q000378:metabolism*; D051381:Rats
D009702:Nucleoside Diphosphate Sugars; C100068:cytidine diphosphate glycerol