title: UK114, a YjgF/Yer057p/UK114 family protein highly conserved from bacteria to mammals, is localized in rat liver peroxisomes.
abstract: Mammalian UK114 belongs to a highly conserved family of proteins with unknown functions. Although it is believed that UK114 is a cytosolic or mitochondrial protein there is no detailed study of its intracellular localization. Using analytical subcellular fractionation, electron microscopic colloidal gold technique, and two-dimensional gel electrophoresis of peroxisomal matrix proteins combined with mass spectrometric analysis we show here that a large portion of UK114 is present in rat liver peroxisomes. The peroxisomal UK114 is a soluble matrix protein and it is not inducible by the peroxisomal proliferator clofibrate. The data predict involvement of UK114 in peroxisomal metabolism.
authors.affiliation: Department of Biochemistry, Biocenter Oulu, University of Oulu, Linnanmaa, P.O. Box 3000, FIN-90014 Oulu, Finland. vasily.antonenkov@oulu.fi
authors.forename: Vasily D
authors.initials: VD
authors.lastname: Antonenkov
authors.forename: Steffen
authors.initials: S
authors.lastname: Ohlmeier
authors.forename: Raija T
authors.initials: RT
authors.lastname: Sormunen
authors.forename: J Kalervo
authors.initials: JK
authors.lastname: Hiltunen
mesh_terms: D000818:Animals; D001419:Bacteria / Q000378:metabolism; D002478:Cells, Cultured; D017124:Conserved Sequence; D022781:Hepatocytes / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D008297:Male; D008322:Mammals / Q000378:metabolism; D009363:Neoplasm Proteins / Q000737:chemistry / Q000378:metabolism*; D020675:Peroxisomes / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014018:Tissue Distribution
chemical_list: D009363:Neoplasm Proteins; C101630:UK114 antigen