title: On the biosynthesis of ubiquinones in plant mitochondria.
abstract: Isolated mitochondria from potato tubers, spinach leaves, and daffodil petals from intermediates of the ubiquinone biosynthetic pathway (prenylated 4-hydroxybenzoate, prenylated phenols, and quinoid compounds) from [1-14C]isopentenyl diphosphate and endogenous or exogenous 4-hydroxybenzoate. In contrast [2-14C]mevalonate 5-diphosphate, the immediate precursor of isopentenyl diphosphate was not accepted as a substrate. These results suggest that plant mitochondria have their own prenyltransferase and prenylation system, similar to the plastid compartment which also starts by the use of isopentenyl diphosphate [see Kreuz, K. and Kleinig, H. (1984) Eur. J. Biochem. 141, 531-535].
mesh_terms: D002458:Cell Fractionation / Q000379:methods; D045782:Hemiterpenes; D062385:Hydroxybenzoates / Q000378:metabolism; D008928:Mitochondria / Q000378:metabolism*; D009943:Organophosphorus Compounds / Q000378:metabolism; D010226:Parabens; D010944:Plants / Q000378:metabolism* / Q000648:ultrastructure; D014451:Ubiquinone / Q000031:analogs & derivatives / Q000096:biosynthesis*
chemical_list: D045782:Hemiterpenes; D062385:Hydroxybenzoates; D009943:Organophosphorus Compounds; D010226:Parabens; D014451:Ubiquinone; C004809:isopentenyl pyrophosphate; C038193:4-hydroxybenzoic acid