Search results for "TAP2"

showing 6 items of 6 documents

Regulation of Dendritic Spine Morphology in Hippocampal Neurons by Copine-6.

2015

Dendritic spines compartmentalize information in the brain, and their morphological characteristics are thought to underly synaptic plasticity. Here we identify copine-6 as a novel modulator of dendritic spine morphology. We found that brain-derived neurotrophic factor (BDNF) - a molecule essential for long-term potentiation of synaptic strength - upregulated and recruited copine-6 to dendritic spines in hippocampal neurons. Overexpression of copine-6 increased mushroom spine number and decreased filopodia number, while copine-6 knockdown had the opposite effect and dramatically increased the number of filopodia, which lacked PSD95. Functionally, manipulation of post-synaptic copine-6 level…

0301 basic medicineDendritic spineVesicular Inhibitory Amino Acid Transport Proteinsdrug effects [Synapses]Tropomyosin receptor kinase BHippocampal formationgenetics [Carrier Proteins]pharmacology [Brain-Derived Neurotrophic Factor]Hippocampusmetabolism [Vesicular Inhibitory Amino Acid Transport Proteins]Mtap2 protein ratMice0302 clinical medicineNeurotrophic factorsdrug effects [Synaptic Vesicles]genetics [Nerve Tissue Proteins]Cells Culturedultrastructure [Neurons]NeuronsChemistryLong-term potentiationSynaptic Potentialsphysiology [Neurons]physiology [Dendritic Spines]Cell biologyultrastructure [Dendritic Spines]metabolism [Receptor trkB]Synaptic VesiclesFilopodiaultrastructure [Synaptosomes]Disks Large Homolog 4 ProteinMicrotubule-Associated ProteinsCognitive NeuroscienceDendritic Spinesmetabolism [Disks Large Homolog 4 Protein]Nerve Tissue Proteinsgenetics [Receptor trkB]03 medical and health sciencesCellular and Molecular NeuroscienceOrgan Culture Techniquesphysiology [Synaptic Vesicles]metabolism [Vesicular Glutamate Transport Protein 1]TrkB protein ratdrug effects [Synaptic Potentials]Synaptic vesicle recyclingAnimalsHumansReceptor trkBddc:610metabolism [Synaptosomes]metabolism [Nerve Tissue Proteins]Viaat protein ratBrain-Derived Neurotrophic Factormetabolism [Microtubule-Associated Proteins]Rats030104 developmental biologygenetics [Synaptic Potentials]nervous systemcytology [Hippocampus]Synaptic plasticityultrastructure [Synapses]SynapsesVesicular Glutamate Transport Protein 1CPNE6 protein ratphysiology [Synapses]Carrier Proteins030217 neurology & neurosurgerymetabolism [Carrier Proteins]SynaptosomesCerebral cortex (New York, N.Y. : 1991)
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Defects in the Human Leukocyte Antigen Class I Antigen Processing Machinery in Head and Neck Squamous Cell Carcinoma: Association with Clinical Outco…

2005

AbstractPurpose: Human leukocyte antigen (HLA) class I antigen defects, which are frequently present in head and neck squamous cell carcinoma (HNSCC) cells may provide the tumor with an escape mechanism from immune surveillance. Scanty information is available about mechanisms underlying HLA class I antigen defects in both lesions and cell lines from HNSCC. In this study, we investigate the role of antigen processing machinery (APM) component abnormalities in the generation of deficient HLA class I surface expression of HNSCC cells.Experimental Design: Using immunohistochemistry, Western blot, and RT-PCR analyses we correlated the expression of the IFN-γ inducible proteasome subunits and of…

AdultMaleProteasome Endopeptidase ComplexCancer ResearchPathologymedicine.medical_specialtyBlotting WesternDown-RegulationHuman leukocyte antigenBiologyCell LineInterferon-gammaATP Binding Cassette Transporter Subfamily B Member 3HLA AntigensMultienzyme ComplexesCell Line TumorTumor Cells Culturedotorhinolaryngologic diseasesmedicineCarcinomaHumansATP Binding Cassette Transporter Subfamily B Member 2AgedReverse Transcriptase Polymerase Chain ReactionAntigen processingHistocompatibility Antigens Class ICancerMiddle Agedmedicine.diseaseImmunohistochemistrySurvival AnalysisHead and neck squamous-cell carcinomaGene Expression Regulation NeoplasticCysteine Endopeptidasesstomatognathic diseasesOncologyHead and Neck NeoplasmsCarcinoma Squamous Cellbiology.proteinImmunohistochemistryTAP2ATP-Binding Cassette TransportersFemaleTAP1Clinical Cancer Research
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High frequency of a non-functional TAP1/LMP2 promoter polymorphism in human tumors

2002

The Tap1 and Tap2 genes encoding for a heterodimeric peptide transporter play a key role in antigen processing and presentation. The TAP complex mediates the transport of peptides generated by the IFN-gamma-inducible proteasome subunits LMP2, 7 and 10 from the cytosol into the endoplasmic reticulum (ER), where they bind to MHC class I molecules. In contrast to the frequent polymorphisms within the rat Tap genes which exert functional differences, polymorphic regions within the human Tap genes have been demonstrated, but not systematically analyzed in terms of their functional significance. Both the Tap1 and Lmp2 genes are transcribed from a bidirectional intergenic promoter which is regulat…

Cancer ResearchTransfectionViral Matrix ProteinsIntergenic regionGene FrequencyGenotypeMHC class ITumor Cells CulturedAnimalsHumansRNA MessengerATP Binding Cassette Transporter Subfamily B Member 2Promoter Regions GeneticCarcinoma Renal CellMelanomaGeneGeneticsPolymorphism GeneticbiologyReverse Transcriptase Polymerase Chain ReactionAntigen processingEndoplasmic reticulumMolecular biologyGene Expression Regulation NeoplasticOncologyCOS Cellsbiology.proteinTAP2ATP-Binding Cassette TransportersTAP1International Journal of Oncology
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TAP-polymorphisms in juvenile onset psoriasis and psoriatic arthritis.

1996

Abstract Juvenile onset psoriasis is strongly associated with the HLA-class I genes Cw6 and B57 whereas patients with psoriatic arthritis show an increased frequency of HLA-B27. It is unclear whether additional major histocompatibility genes also increase disease susceptibility. The TAP genes (transporter associated with antigen processing) encode two membrane-spanning proteins that translocate antigenic peptides from the cytoplasm into the endoplasmic reticulum. Comparison of 60 patients with juvenile onset psoriasis, 63 psoriatic arthritis patients, and 101 caucasoid controls revealed an increase of the TAP1 ∗ 0101 allele in the psoriasis group, that could not be explained by linkage to o…

ImmunologyLinkage DisequilibriumMajor Histocompatibility ComplexPsoriatic arthritisATP Binding Cassette Transporter Subfamily B Member 3PsoriasismedicineImmunology and AllergyHumansPsoriasisAlleleATP Binding Cassette Transporter Subfamily B Member 2GenePolymorphism Geneticbiologybusiness.industryEndoplasmic reticulumArthritis PsoriaticHistocompatibility Antigens Class IGeneral MedicineTransporter associated with antigen processingHLA-DR Antigensmedicine.diseaseImmunologybiology.proteinTAP2ATP-Binding Cassette TransportersTAP1businessHuman immunology
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Analysis of the structural integrity of the TAP2 gene in renal cell carcinoma.

2003

The transporter associated with antigen processing (TAP) gene products is involved in the processing of endogenous peptides that bind to MHC class I molecules. Mutations and/or polymorphism within these genes could alter the efficacy of the immune response which might be relevant for the development of autoimmune diseases and cancer. In this study we examined both the structural integrity and the polymorphism of TAP2 in renal cell carcinoma lesions by sequencing TAP2 in renal cell carcinoma lesions and autologous normal kidney epithelium. TAP2 sequence analysis of 31 renal cell carcinoma lesions, one oncocytoma and respective autologous normal kidney epithelium revealed no mutation in the T…

MaleCancer ResearchPathologymedicine.medical_specialtyHeterozygoteBiologyKidneyEpitheliumLoss of heterozygosityRenal cell carcinomaATP Binding Cassette Transporter Subfamily B Member 3GenotypeCarcinomamedicineHumansCarcinoma Renal CellAllelesAgedAged 80 and overKidneyPolymorphism GeneticReverse Transcriptase Polymerase Chain ReactionHomozygoteTransporter associated with antigen processingDNADNA Restriction EnzymesMiddle Agedmedicine.diseaseMolecular biologyKidney Neoplasmsmedicine.anatomical_structureOncologyMutationbiology.proteinTAP2RNAATP-Binding Cassette TransportersFemaleGene polymorphismPeptidesInternational journal of oncology
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Functional cysteine-less subunits of the transporter associated with antigen processing (TAP1 and TAP2) by de novo gene assembly

2002

AbstractWithin the adaptive immune system the transporter associated with antigen processing (TAP) plays a pivotal role in loading of peptides onto major histocompatibility (MHC) class I molecules. As a central tool to investigate the structure and function of the TAP complex, we created cysteine-less human TAP subunits by de novo gene synthesis, replacing all 19 cysteines in TAP1 and TAP2. After expression in TAP-deficient human fibroblasts, cysteine-less TAP1 and TAP2 are functional with respect to adenosine triphosphate (ATP)-dependent peptide transport and inhibition by ICP47 from herpes simplex virus. Cysteine-less TAP1 and TAP2 restore maturation and intracellular trafficking of MHC c…

Models MolecularBiophysicsBiological Transport ActiveBiologyMajor histocompatibility complexTransfectionBiochemistryCell Linechemistry.chemical_compoundAdenosine TriphosphateStructural BiologyATP Binding Cassette Transporter Subfamily B Member 3Cysteine-scanning mutagenesisMHC class IGeneticsHumansCysteineATP Binding Cassette Transporter Subfamily B Member 2Molecular BiologyAntigen PresentationAntigen processingHistocompatibility Antigens Class ICell BiologyTransporter associated with antigen processingMolecular biologyRecombinant ProteinsCell biologyProtein SubunitschemistryAmino Acid SubstitutionAntigen processingPeptide transportMembrane proteinbiology.proteinAdenosine triphosphate-binding cassette transporterTAP2ATP-Binding Cassette TransportersTAP1Adenosine triphosphateFEBS Letters
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