1987
Import and processing of human ornithine transcarbamoylase precursor by mitochondria from Saccharomyces cerevisiae.
Cheng M, Pollock R, Hendrick J, Horwich A. Import and processing of human ornithine transcarbamoylase precursor by mitochondria from Saccharomyces cerevisiae. Proceedings Of The National Academy Of Sciences Of The United States Of America 1987, 84: 4063-4067. PMID: 3295876, PMCID: PMC305022, DOI: 10.1073/pnas.84.12.4063.Peer-Reviewed Original ResearchConceptsMitochondrial membraneEnzymatic activityNH2-terminal leader peptideMitochondrial matrix fractionWild-type precursorS. cerevisiae strainMitochondrial importMammalian mitochondriaMature subunitSubunit precursorOperon promoterS. cerevisiaeSelective growth conditionsLeader peptideYeast cellsArtificial mutationsOTCase activityMatrix fractionOrnithine transcarbamoylaseCerevisiae strainSaccharomycesGrowth conditionsMatrix compartmentMitochondriaSubunits
1985
Expression of amplified DNA sequences for ornithine transcarbamylase in HeLa cells: arginine residues may be required for mitochondrial import of enzyme precursor.
Horwich A, Fenton W, Firgaira F, Fox J, Kolansky D, Mellman I, Rosenberg L. Expression of amplified DNA sequences for ornithine transcarbamylase in HeLa cells: arginine residues may be required for mitochondrial import of enzyme precursor. Journal Of Cell Biology 1985, 100: 1515-1521. PMID: 3988798, PMCID: PMC2113848, DOI: 10.1083/jcb.100.5.1515.Peer-Reviewed Original ResearchConceptsMitochondrial importOTC precursorsHeLa cellsOrnithine transcarbamylaseArginine residuesMouse dihydrofolate reductaseNH2-terminal leader sequenceRate of importArginine analog canavanineViral regulatory elementsImmunoprecipitation of extractsMitochondrial localizationCDNA sequenceRegulatory elementsLeader sequenceDNA sequencesEnzyme precursorsMitochondrial enzymesCell extractsDihydrofolate reductaseEnzymatic activityBlot analysisNormal precursorsResiduesSubunitsA leader peptide is sufficient to direct mitochondrial import of a chimeric protein.
Horwich A, Kalousek F, Mellman I, Rosenberg L. A leader peptide is sufficient to direct mitochondrial import of a chimeric protein. The EMBO Journal 1985, 4: 1129-1135. PMID: 3891325, PMCID: PMC554314, DOI: 10.1002/j.1460-2075.1985.tb03750.x.Peer-Reviewed Original ResearchConceptsChimeric precursor proteinsMitochondrial importLeader peptideChimeric precursorsDihydrofolate reductaseMost mitochondrial proteinsPost-translational importMutant CHO cell linesCloned nucleotide sequencePrecursor proteinOrnithine transcarbamylaseCell-free systemCHO cell linesEnzyme dihydrofolate reductaseMitochondrial proteinsMitochondrial localizationRegulatory elementsLeader sequenceNucleotide sequenceStable transformantsAdditional proteinsSelectable markerChimeric proteinLarger precursorIntact cells