Search results for "HTT protein"

showing 3 items of 3 documents

Pharmacological disruption of the MID1/α4 interaction reduces mutant Huntingtin levels in primary neuronal cultures.

2017

Expression of mutant Huntingtin (HTT) protein is central to the pathophysiology of Huntington's Disease (HD). The E3 ubiquitin ligase MID1 appears to have a key role in facilitating translation of the mutant HTT mRNA suggesting that interference with the function of this complex could be an attractive therapeutic approach. Here we describe a peptide that is able to disrupt the interaction between MID1 and the α4 protein, a regulatory subunit of protein phosphatase 2A (PP2A). By fusing this peptide to a sequence from the HIV-TAT protein we demonstrate that the peptide can disrupt the interaction within cells and show that this results in a decrease in levels of ribosomal S6 phosphorylation a…

0301 basic medicinecongenital hereditary and neonatal diseases and abnormalitiesHuntingtinMid1 protein mouseProtein subunitUbiquitin-Protein LigasesMutantPrimary Cell CulturePeptide03 medical and health sciencesMiceHuntington's diseasemental disordersmedicineAnimalsHumansHtt protein mouseddc:610Protein Phosphatase 2Neuronschemistry.chemical_classificationMessenger RNAHuntingtin ProteinbiologyChemistryGeneral NeuroscienceProteinsgenetics [Huntingtin Protein]metabolism [Protein Phosphatase 2]metabolism [Proteins]Protein phosphatase 2medicine.diseaseUbiquitin ligaseCell biology030104 developmental biologyHEK293 Cellsmetabolism [Neurons]metabolism [Huntingtin Protein]Mutationbiology.proteinProtein Binding
researchProduct

A protein quality control pathway regulated by linear ubiquitination.

2019

Neurodegenerative diseases are characterized by the accumulation of misfolded proteins in the brain. Insights into protein quality control mechanisms to prevent neuronal dysfunction and cell death are crucial in developing causal therapies. Here, we report that various disease-associated protein aggregates are modified by the linear ubiquitin chain assembly complex (LUBAC). HOIP, the catalytic component of LUBAC, is recruited to misfolded Huntingtin in a p97/VCP-dependent manner, resulting in the assembly of linear polyubiquitin. As a consequence, the interactive surface of misfolded Huntingtin species is shielded from unwanted interactions, for example with the low complexity sequence doma…

MaleHuntingtinSp1 protein humanProtein aggregationHTT protein humanDeubiquitinating enzymegenetics [Huntington Disease]Micegenetics [Sp1 Transcription Factor]0302 clinical medicineUbiquitinpathology [Brain]Valosin Containing Proteincytology [Fibroblasts]pathology [Neurons]PolyubiquitinCells CulturedMice Knockout0303 health sciencesHuntingtin ProteinGeneral NeuroscienceNF-kappa Bgenetics [Huntingtin Protein]Middle AgedCell biologymetabolism [Polyubiquitin]pathology [Huntington Disease]metabolism [Neurons]metabolism [NF-kappa B]Protein foldingFemalemetabolism [Fibroblasts]Protein BindingSignal TransductionAdultmetabolism [Valosin Containing Protein]Sp1 Transcription Factorcytology [Embryo Mammalian]genetics [Valosin Containing Protein]BiologyGeneral Biochemistry Genetics and Molecular Biologymetabolism [Sp1 Transcription Factor]03 medical and health sciencesddc:570Gene silencingAnimalsHumansmetabolism [Huntington Disease]Protein Interaction Domains and MotifsMolecular Biologymetabolism [Embryo Mammalian]030304 developmental biologyAgedSp1 transcription factorGeneral Immunology and MicrobiologyUbiquitinationProteotoxicitymetabolism [Brain]Case-Control Studiesmetabolism [Huntingtin Protein]biology.proteinProtein Processing Post-Translational030217 neurology & neurosurgerygenetics [NF-kappa B]
researchProduct

Translation of HTT mRNA with expanded CAG repeats is regulated by the MID1-PP2A protein complex.

2012

Expansion of CAG repeats is a common feature of various neurodegenerative disorders, including Huntington's disease. Here we show that expanded CAG repeats bind to a translation regulatory protein complex containing MID1, protein phosphatase 2A and 40S ribosomal S6 kinase. Binding of the MID1-protein phosphatase 2A protein complex increases with CAG repeat size and stimulates translation of the CAG repeat expansion containing messenger RNA in a MID1-, protein phosphatase 2A- and mammalian target of rapamycin-dependent manner. Our data indicate that pathological CAG repeat expansions upregulate protein translation leading to an overproduction of aberrant protein and suggest that the MID1-com…

metabolism [Microtubule Proteins]General Physics and AstronomyHTT protein humanRibosomal s6 kinaseMice0302 clinical medicinemetabolism [Transcription Factors]Protein Phosphatase 2Luciferasesgenetics [Nerve Tissue Proteins]genetics [Protein Biosynthesis]0303 health sciencesHuntingtin ProteinMultidisciplinarybiologyTOR Serine-Threonine KinasesNuclear ProteinsTranslation (biology)3. Good healthmetabolism [Luciferases]Microtubule Proteinsddc:500metabolism [Nuclear Proteins]genetics [Trinucleotide Repeat Expansion]Protein Bindingcongenital hereditary and neonatal diseases and abnormalitiesMTOR protein humanUbiquitin-Protein LigasesBlotting WesternNerve Tissue Proteinsmetabolism [TOR Serine-Threonine Kinases]metabolism [RNA Messenger]General Biochemistry Genetics and Molecular Biology03 medical and health sciencesgenetics [RNA Messenger]mental disordersHuntingtin ProteinAnimalsHumansEukaryotic Small Ribosomal SubunitRNA MessengerNucleotide Motifs030304 developmental biologyMessenger RNAmetabolism [Nerve Tissue Proteins]RNAmetabolism [Protein Phosphatase 2]General ChemistryProtein phosphatase 2Molecular biologynervous system diseasesProtein Biosynthesisbiology.proteinTrinucleotide repeat expansionTrinucleotide Repeat Expansion030217 neurology & neurosurgeryMid1 protein humanHeLa CellsTranscription FactorsNature communications
researchProduct