Proteasome Endopeptidase ComplexProteolysisUbiquitinUbiquitin-Protein LigasesUbiquitinsUbiquitinationCysteine EndopeptidasesMuscle ProteinsMethylhistidinesMultienzyme ComplexesEndoplasmic Reticulum-Associated DegradationProteinsProteasome InhibitorsPeptide HydrolasesLeupeptinsSKP Cullin F-Box Protein LigasesMolecular Sequence DataAutophagyMuscular AtrophyAmino Acid SequenceLeucineCysteine Proteinase InhibitorsF-Box ProteinsCell LineBiodegradation, EnvironmentalEndoplasmic ReticulumProtein Processing, Post-TranslationalEndopeptidase ClpEndopeptidasesLysosomesMutationProtein StabilityProtease InhibitorsHydrolysisAmino AcidsUbiquitin-Conjugating EnzymesPolyubiquitinProtein BindingSignal TransductionKineticsLigasesSaccharomyces cerevisiaeAdenosine TriphosphatasesCells, CulturedUbiquitinated ProteinsCullin ProteinsRNA, MessengerATP-Dependent ProteasesProtein TransportModels, BiologicalSaccharomyces cerevisiae ProteinsProtein BiosynthesisCalpainMolecular ChaperonesProtein Structure, TertiaryCell Cycle ProteinsMuscle, SkeletalUbiquitin-Protein Ligase ComplexesTime FactorsCycloheximidePhosphorylationCachexiaGene Expression RegulationBlotting, WesternProtein FoldingCarrier ProteinsProtein Degradation End ProductsCell Line, TumorSubstrate SpecificityHeLa CellsProtease LaDown-RegulationCathepsinsProtein Synthesis InhibitorsRNA InterferenceHEK293 CellsBase SequenceFungal ProteinsMembrane ProteinsImmunoblottingImmunoprecipitationMusclesHalf-LifeRecombinant Fusion ProteinsChloroquineHSP90 Heat-Shock ProteinsLiverUbiquitin-Activating EnzymesValeratesNuclear ProteinsMyofibrilsFibroblastsNitrogenTranscription FactorsUbiquitin ThiolesteraseAdenosine TriphosphateElectrophoresis, Polyacrylamide GelCattleVacuolesRecombinant Proteins