2011
Posttranscriptional activation of gene expression in Xenopus laevis oocytes by microRNA–protein complexes (microRNPs)
Mortensen RD, Serra M, Steitz JA, Vasudevan S. Posttranscriptional activation of gene expression in Xenopus laevis oocytes by microRNA–protein complexes (microRNPs). Proceedings Of The National Academy Of Sciences Of The United States Of America 2011, 108: 8281-8286. PMID: 21536868, PMCID: PMC3100953, DOI: 10.1073/pnas.1105401108.Peer-Reviewed Original ResearchConceptsMicroRNA–protein complexesProtein kinase AIIXenopus laevis oocytesImmature Xenopus laevis oocytesGene expression activationMammalian cell linesLaevis oocytesHuman Ago2Target reporterMammalian cellsExpression activationMyt1 kinaseGene expressionPosttranscriptional activationRegulated expressionSpecific mRNAsPhysiological relevanceQuiescent cellsMicroRNAsOocyte stateCell linesOocytesReporterCAMP levelsExpression
2008
Minor-class splicing occurs in the nucleus of the Xenopus oocyte
Friend K, Kolev NG, Shu MD, Steitz JA. Minor-class splicing occurs in the nucleus of the Xenopus oocyte. RNA 2008, 14: 1459-1462. PMID: 18567814, PMCID: PMC2491479, DOI: 10.1261/rna.1119708.Peer-Reviewed Original ResearchConceptsSmall nuclear ribonucleoproteinMinor class intronsU12-type splicingXenopus oocytesU12-dependent intronsNuclear envelope breakdownCertain eukaryotesMinor spliceosomeVertebrate cellsSplicing substrateNuclear compartmentNuclear ribonucleoproteinRNA intronsAccurate splicingEnvelope breakdownSplicingIntronsCytoplasmOocytesEukaryotesSpliceosomeMeiosisRibonucleoproteinNucleusSmall fraction
2002
Exclusive Interaction of the 15.5 kD Protein with the Terminal Box C/D Motif of a Methylation Guide snoRNP
Szewczak LB, DeGregorio SJ, Strobel SA, Steitz JA. Exclusive Interaction of the 15.5 kD Protein with the Terminal Box C/D Motif of a Methylation Guide snoRNP. Cell Chemical Biology 2002, 9: 1095-1107. PMID: 12401494, DOI: 10.1016/s1074-5521(02)00239-9.Peer-Reviewed Original ResearchConceptsBox C/D motifKD proteinD motifBox C/D snoRNAsBox C/D snoRNPsSite-specific methylationSpliceosomal RNAsDeleterious substitutionsD snoRNAsD snoRNPsBox DExclusive interactionsInteraction sitesXenopus oocytesSnoRNPsProteinMotifSnoRNAsVivoMethylationA89Single interaction siteRNAExocyclic amineOocytes
2001
Internal Modification of U2 Small Nuclear (Snrna) Occurs in Nucleoli of Xenopus Oocytes
Yu Y, Shu M, Narayanan A, Terns R, Terns M, Steitz J. Internal Modification of U2 Small Nuclear (Snrna) Occurs in Nucleoli of Xenopus Oocytes. Journal Of Cell Biology 2001, 152: 1279-1288. PMID: 11257127, PMCID: PMC2199211, DOI: 10.1083/jcb.152.6.1279.Peer-Reviewed Original ResearchConceptsNucleolar localizationCajal bodiesU2 RNAInternal modificationSmall nuclearSm binding siteNucleolar localization signalSmall nucleolar RNAsXenopus oocytesCytoplasm of oocytesU2 small nuclearGuanosine capLocalization signalNucleolar RNAsRNAs showSubcellular sitesIntranuclear localizationIsolated nucleiRNABinding sitesNucleoliOocytesNucleotidesCytoplasmU2
1998
AUUUA Sequences Direct mRNA Deadenylation Uncoupled from Decay during Xenopus Early Development
Voeltz G, Steitz J. AUUUA Sequences Direct mRNA Deadenylation Uncoupled from Decay during Xenopus Early Development. Molecular And Cellular Biology 1998, 18: 7537-7545. PMID: 9819439, PMCID: PMC109334, DOI: 10.1128/mcb.18.12.7537.Peer-Reviewed Original ResearchConceptsAU-rich elementsXenopus early developmentGranulocyte-macrophage colony-stimulating factor (GM-CSF) geneUntranslated region sequencesHuman granulocyte-macrophage colony-stimulating factor geneChimeric mRNAMid-blastula transitionEarly developmentColony-stimulating factor geneRNA deadenylationMRNA decayRapid deadenylationMRNA deadenylationDeadenylation activityDeadenylationFactor genesRegion sequencesEgg activationAUUUAC-MycMature eggsXenopus oocytesMRNAOocytesXenopusModification of U6 Spliceosomal RNA Is Guided by Other Small RNAs
Tycowski K, You Z, Graham P, Steitz J. Modification of U6 Spliceosomal RNA Is Guided by Other Small RNAs. Molecular Cell 1998, 2: 629-638. PMID: 9844635, DOI: 10.1016/s1097-2765(00)80161-6.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBase SequenceCell FractionationCell LineCell NucleolusChromosomal Proteins, Non-HistoneDimerizationHeLa CellsHumansMethylationMiceMolecular Sequence DataNucleic Acid ConformationOligodeoxyribonucleotides, AntisenseOocytesPrecipitin TestsRibonuclease HRNA, Ribosomal, 28SRNA, Small NuclearSpliceosomesXenopus laevis
1996
A small nucleolar RNA requirement for site-specific ribose methylation of rRNA in Xenopus
Tycowski K, Smith C, Shu M, Steitz J. A small nucleolar RNA requirement for site-specific ribose methylation of rRNA in Xenopus. Proceedings Of The National Academy Of Sciences Of The United States Of America 1996, 93: 14480-14485. PMID: 8962077, PMCID: PMC26158, DOI: 10.1073/pnas.93.25.14480.Peer-Reviewed Original ResearchConceptsSmall nucleolar RNA (snoRNA) speciesSite-specific ribose methylationXenopus oocyte systemSnoRNA speciesSnoRNA genesRibose methylationVertebrate cellsRNA speciesMultiple homologsSnoRNA stabilityRRNASnoRNAsOocyte systemRNA requirementsXenopusXenopus oocytesFibrillarinMethylationSpeciesOocytesVertebratesHomologCloningGenesTranscripts
1994
Requirement for Intron-Encoded U22 Small Nucleolar RNA in 18S Ribosomal RNA Maturation
Tycowski K, Shu M, Steitz J. Requirement for Intron-Encoded U22 Small Nucleolar RNA in 18S Ribosomal RNA Maturation. Science 1994, 266: 1558-1561. PMID: 7985025, DOI: 10.1126/science.7985025.Peer-Reviewed Original ResearchConceptsRibosomal RNASmall RNAsProtein-coding gene transcriptsRibosomal RNA maturationSmall nucleolar RNAsRNA maturationVertebrate cellsCellular functionsNucleolar RNAsHost genesIntron fragmentGene transcriptsRNAXenopus oocytesU22IntronsGenesTranscriptsNucleoliOocytesMaturationTargetingCellsFragmentsDepletionSequence and structural elements critical for U8 snRNP function in Xenopus oocytes are evolutionarily conserved.
Peculis BA, Steitz JA. Sequence and structural elements critical for U8 snRNP function in Xenopus oocytes are evolutionarily conserved. Genes & Development 1994, 8: 2241-2255. PMID: 7958892, DOI: 10.1101/gad.8.18.2241.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBase SequenceBiological EvolutionChromosomal Proteins, Non-HistoneConserved SequenceFemaleMethylationMolecular Sequence DataMutagenesis, Site-DirectedMutationNucleic Acid ConformationOocytesRibonucleoproteins, Small NuclearRNA CapsRNA PrecursorsRNA Processing, Post-TranscriptionalRNA, Small NuclearXenopus