Search results for "Trans-acting siRNA"

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Arabidopsis SGS2 and SGS3 genes are required for posttranscriptional gene silencing and natural virus resistance.

2000

AbstractPosttranscriptional gene silencing (PTGS) in plants results from the degradation of mRNAs and shows phenomenological similarities with quelling in fungi and RNAi in animals. Here, we report the isolation of sgs2 and sgs3 Arabidopsis mutants impaired in PTGS. We establish a mechanistic link between PTGS, quelling, and RNAi since the Arabidopsis SGS2 protein is similar to an RNA-dependent RNA polymerase like N. crassa QDE-1, controlling quelling, and C. elegans EGO-1, controlling RNAi. In contrast, SGS3 shows no significant similarity with any known or putative protein, thus defining a specific step of PTGS in plants. Both sgs2 and sgs3 mutants show enhanced susceptibility to virus, d…

0106 biological sciencesRNA-induced transcriptional silencingDNA PlantRNA-induced silencing complexTrans-acting siRNAMolecular Sequence DataPotyvirusArabidopsisRNA-dependent RNA polymerase[SDV.BC]Life Sciences [q-bio]/Cellular BiologyGenes Plant01 natural sciencesCucumovirusGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciencesSolanum lycopersicumRNA interferenceArabidopsisGene expressionGene silencingAmino Acid SequenceGene SilencingCloning MolecularRNA Processing Post-Transcriptional[SDV.BC] Life Sciences [q-bio]/Cellular BiologyComputingMilieux_MISCELLANEOUS030304 developmental biologyPlant DiseasesPlant ProteinsGenetics0303 health sciencesbiologyBase SequenceBiochemistry Genetics and Molecular Biology(all)Arabidopsis ProteinsfungiTobamovirusChromosome MappingGENETIQUEbiology.organism_classificationRNA-Dependent RNA PolymeraseMutagenesis010606 plant biology & botanyCell
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Dual-targeting siRNAs.

2010

We have developed an algorithm for the prediction of dual-targeting short interfering RNAs (siRNAs) in which both strands are deliberately designed to separately target different mRNA transcripts with complete complementarity. An advantage of this approach versus the use of two separate duplexes is that only two strands, as opposed to four, are competing for entry into the RNA-induced silencing complex. We chose to design our dual-targeting siRNAs as Dicer substrate 25/27mer siRNAs, since design features resembling pre-microRNAs (miRNAs) can be introduced for Dicer processing. Seven different dual-targeting siRNAs targeting genes that are potential targets in cancer therapy have been develo…

STAT3 Transcription FactorSmall interfering RNATranscription GeneticTrans-acting siRNAGenes mycMethodComputational biologyKidneyPolymerase Chain ReactionCell LineSuppression GeneticRNA interferencemicroRNAGene silencingHumansRNA MessengerRNA Small InterferingMolecular BiologyGeneticsGene knockdownbiologyBase SequenceRNAProtein Biosynthesisbiology.proteinProto-Oncogene Proteins c-bcl-6AlgorithmsDicerRNA (New York, N.Y.)
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