Search results for "Endoribonucleases"

showing 3 items of 13 documents

Depletion ofL-arginine induces autophagy as a cytoprotective response to endoplasmic reticulum stress in human T lymphocytes

2012

PMCID: PMC3494587

X-Box Binding Protein 1Proteasome Endopeptidase ComplexProgrammed cell deathXBP1CD3 ComplexMAP Kinase Signaling SystemRNA SplicingT-LymphocytesT cellDown-RegulationApoptosisRegulatory Factor X Transcription FactorsUbiquitin-Activating EnzymesProtein Serine-Threonine KinasesBiologyArginineLymphocyte ActivationAutophagy-Related Protein 7Jurkat cellsJurkat CellsEndoribonucleasesAutophagymedicineHumansMolecular BiologyCell ProliferationTOR Serine-Threonine KinasesAutophagyMembrane ProteinsCell BiologyBECN1Endoplasmic Reticulum StressG1 Phase Cell Cycle CheckpointsBasic Research Paper3. Good healthCell biologyDNA-Binding Proteinsmedicine.anatomical_structureCytoprotectionApoptosisUnfolded protein responseBeclin-1MitogensApoptosis Regulatory ProteinsLysosomesProto-Oncogene Proteins c-aktTranscription FactorsAutophagy
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The guanidinium group as a key part of water-soluble polymer carriers for siRNA complexation and protection against degradation.

2014

Here, the preparation of a novel block copolymer consisting of a statistical copolymer N-(2-hydroxypropyl) methacrylamide-s-N-(3-aminopropyl) methacrylamide and a short terminal 3-guanidinopropyl methacrylamide block is reported. This polymer structure forms neutral but water-soluble nanosized complexes with siRNA. The siRNA block copolymer complexes are first analyzed using agarose gel electrophoresis and their size is determined with fluorescence correlation spectroscopy. The protective properties of the polymer against RNA degradation are investigated by treating the siRNA block copolymer complexes with RNase V1. Heparin competition assays confirm the efficient release of the cargo in vi…

chemistry.chemical_classificationAcrylamidesMaterials sciencePolymers and PlasticsMicroscale thermophoresisRNase PPolymersOrganic ChemistryWaterFluorescence correlation spectroscopyPolymerchemistry.chemical_compoundchemistryAgarose gel electrophoresisPolymer chemistryEndoribonucleasesMaterials ChemistryCopolymerMethacrylamideMoleculeRNA Small InterferingGuanidineMacromolecular rapid communications
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Cooperative symmetric to asymmetric conformational transition of the apo-form of scavenger decapping enzyme revealed by simulations.

2007

Decapping is a central step in eukaryotic mRNA turnover and in gene expression regulation. The human scavenger decapping enzyme, DcpS, catalyses cap hydrolysis following mRNA degradation. DcpS is a dimeric enzyme, with two active sites. Crystal structures suggest that DcpS must undergo significant conformational changes upon ligand binding, but the mechanism of this transition is unknown. Here, we report two long timescale (20 ns) molecular dynamics simulations of the apo-form of DcpS. The dimer is observed to undergo a strikingly cooperative motion, with one active site closing while the other opens. The amplitude of the conformational change is 6–21 A and the apparent timescale is 4–13 ns…

chemistry.chemical_classificationMessenger RNAConformational changebiologyStereochemistryProtein ConformationDimerHydrolysisDCPSActive siteLigand (biochemistry)Crystallography X-RayBiochemistryCatalysisMolecular dynamicschemistry.chemical_compoundEnzymechemistryStructural BiologyEndoribonucleasesbiology.proteinHumansMolecular BiologyDimerizationProteins
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