Search results for "Enzyme complex"

showing 5 items of 55 documents

Development and characterization of mouse anti-human LMP2, LMP7, TAP1 and TAP2 monoclonal antibodies.

2008

Low molecular mass polypeptides (LMP) 2 and LMP7 and transporter associated with antigen processing (TAP) subunits TAP1 and TAP2 play a crucial role in antigen processing and cell surface expression of HLA class I molecules. Since monoclonal antibodies (mAb) to these molecules will facilitate the analysis of their expression, structure and function in normal and transformed cells, in the present study we have developed these reagents. Specifically anti-LMP2 and LMP7 mAb were generated from BALB/c mice immunized with specific peptides, and anti-TAP1 and TAP2 mAb from BALB/c mice immunized with respective recombinant proteins. mAb VF101-39F7 and VF101-39G5 were shown to be specific for LMP2, …

Proteasome Endopeptidase Complexmedicine.drug_classRecombinant Fusion ProteinsImmunologyAntigen presentationBiologyMonoclonal antibodyBiochemistrylaw.inventionCell LineMicelawATP Binding Cassette Transporter Subfamily B Member 3Antibody SpecificityHLA AntigensMultienzyme ComplexesGeneticsmedicineImmunology and AllergyAnimalsHumansATP Binding Cassette Transporter Subfamily B Member 2DNA PrimersSkinAntigen PresentationMice Inbred BALB CHybridomasImmunoperoxidaseBase SequenceAntigen processingAntibodies MonoclonalProteinsGeneral MedicineTransporter associated with antigen processingMolecular biologyImmunohistochemistryCysteine EndopeptidasesCell cultureMonoclonalRecombinant DNAATP-Binding Cassette TransportersFemaleIndicators and ReagentsTissue antigens
researchProduct

Revisiting the pH-gated conformational switch on the activities of HisKA-family histidine kinases

2020

13 páginas, 6 figuras, 3 tablas

0301 basic medicineModels MolecularBioquímicaHistidine KinaseProtein ConformationScience030106 microbiologyPhosphataseGeneral Physics and AstronomyMicrobiologiaCrystallography X-RayModels BiologicalBiochemistryMicrobiologyGeneral Biochemistry Genetics and Molecular BiologyCatalysisArticleEnzyme catalysis03 medical and health sciencesResidue (chemistry)Protein structureBacterial ProteinsMultienzyme ComplexesHistidineThermotoga maritimaPhosphorylationlcsh:ScienceAuthor CorrectionHistidineX-ray crystallographyMultidisciplinaryEffectorChemistryEscherichia coli ProteinsQGeneral ChemistryHydrogen-Ion ConcentrationResponse regulator030104 developmental biologyBiochemistryMutationTrans-ActivatorsPhosphorylationlcsh:QBacterial Outer Membrane Proteins
researchProduct

Circumdatin H, a new inhibitor of mitochondrial NADH oxidase, from Aspergillus ochraceus

2005

Circumdatin H (1), a new alkaloid from the culture broth of Aspergillus ochraceus, has been isolated, together with a known circumdatin, circumdatin E (2) and other known compounds: flavacol (3) and stephacidin A (4). The structure of 1 was established on the basis of chemical and spectral evidence. All of these alkaloids showed biological activity as inhibitors of the mammalian mitochondrial respiratory chain.

Magnetic Resonance SpectroscopyChemical PhenomenaSpectrophotometry InfraredStereochemistryCircumdatin HMass SpectrometryElectron Transportchemistry.chemical_compoundMultienzyme ComplexesDrug Discoveryheterocyclic compoundsNADH NADPH OxidoreductasesEnzyme InhibitorsPharmacologyAspergillus ochraceusBenzodiazepinonesbiologyChemistry PhysicalAlkaloidStephacidinBiological activityGeneral Medicinebiology.organism_classificationMitochondriaCircumdatin EMitochondrial respiratory chainchemistryBiochemistryFermentationNADH oxidaseSpectrophotometry UltravioletAspergillus ochraceus
researchProduct

The analysis of modified peroxisome proliferator responsive elements of the peroxisomal bifunctional enzyme in transfected HepG2 cells reveals two re…

1995

AbstractPeroxisome proliferators (PPs) are non-genotoxic carcinogens in rodents. They can induce the expression of numerous genes via the heterodimerization of two members of the steroid hormone receptor superfamily, called the peroxisome proliferator-activated receptor (PPAR) and the 9-cis retinoic acid receptor (RXR). Many of the PP responsive genes possess a peroxisome proliferator response element (PPRE) formed by two TGACCT-related motifs. The bifunctional enzyme (HD) PPRE contains 3 such motifs, creating DR1 and DR2 sequences. PPAR and RXR regulate transcription via the DR1 element while DR2 modulates the expression of the gene via auxiliary factors in HepG2 cells.

Peroxisome proliferator-activated receptor gammaReceptors Retinoic AcidSteroid hormone receptorMolecular Sequence DataResponse elementBiophysicsReceptors Cytoplasmic and NuclearPeroxisome proliferator-activated receptorchemical and pharmacologic phenomenaIn Vitro TechniquesRegulatory Sequences Nucleic AcidRetinoid X receptorBiologyPeroxisomal Bifunctional EnzymeTransfectionMicrobodiesBiochemistryGene Expression Regulation EnzymologicTranscriptional activationPeroxisomal Bifunctional EnzymeMultienzyme ComplexesStructural BiologyPeroxisome proliferator response element9-cis Retinoic acid receptor alphaTumor Cells CulturedGeneticsHumansRNA MessengerIsomerasesEnoyl-CoA HydrataseMolecular Biologychemistry.chemical_classificationBinding SitesBase Sequence3-Hydroxyacyl CoA DehydrogenasesPeroxisome proliferator-activated receptorCell BiologyDNA-Binding ProteinsRetinoic acid receptorRetinoid X ReceptorsLiverOligodeoxyribonucleotidesBiochemistrychemistryRat peroxisomal enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenaseEnzyme InductionPeroxisome proliferator-activated receptor alphaTranscription FactorsFEBS Letters
researchProduct

Inhibition of ubiquitin-dependent proteolysis by a synthetic glycine-alanine repeat peptide that mimics an inhibitory viral sequence.

2002

AbstractThe glycine–alanine repeat (GAr) of the Epstein–Barr virus nuclear antigen-1 is a cis-acting transferable element that inhibits ubiquitin/proteasome-dependent proteolysis in vitro and in vivo. We have here examined the effect of a synthetic 20-mer GAr oligopeptide on the degradation of iodinated or biotin labeled lysozyme in a rabbit reticulocyte lysates in vitro assay. Micromolar concentrations of the GA-20 peptide inhibited the hydrolysis of lysozyme without significant effect on ubiquitination. Addition of the peptide did not inhibit the hydrolysis of fluorogenic substrate by purified proteasomes and did not affect the ubiquitination of lysozyme. An excess of the peptide failed t…

Herpesvirus 4 HumanProteasome Endopeptidase ComplexGly–Ala repeatPolymersProteolysisMolecular Sequence DataBiophysicsGlycineBiotinPeptideBiochemistryIodine Radioisotopeschemistry.chemical_compoundS5aUbiquitinStructural BiologyMultienzyme ComplexesGeneticsmedicineAnimalsAmino Acid SequenceEnzyme InhibitorsMolecular BiologyPeptide sequenceUbiquitinsEpstein–Barr virus nuclear antigen-1Alaninechemistry.chemical_classificationOligopeptideAlaninebiologymedicine.diagnostic_testProteasomeMolecular MimicryUbiquitinationCell BiologyCysteine EndopeptidasesBiochemistryProteasomechemistryEpstein-Barr Virus Nuclear AntigensIsotope Labelingbiology.proteinMuramidaseRabbitsLysozymeCarrier ProteinsPeptidesOligopeptidesFEBS letters
researchProduct