2023
Human nucleolar protein 7 (NOL7) is required for early pre-rRNA accumulation and pre-18S rRNA processing
McCool M, Bryant C, Huang H, Ogawa L, Farley-Barnes K, Sondalle S, Abriola L, Surovtseva Y, Baserga S. Human nucleolar protein 7 (NOL7) is required for early pre-rRNA accumulation and pre-18S rRNA processing. RNA Biology 2023, 20: 257-271. PMID: 37246770, PMCID: PMC10228412, DOI: 10.1080/15476286.2023.2217392.Peer-Reviewed Original ResearchConceptsPre-rRNA accumulationRibosome biogenesisNonessential roleEukaryotic ribosome biogenesisEssential cellular processesNucleolar stress responsePre-rRNA levelsRRNA processingLikely orthologCellular processesAssociated proteinsTumor suppressorStress responseHuman cellsProtein synthesisProtein 7Human counterpartBiogenesisYeastOrthologsHomologSubcomplexAccumulationRRNATranscription
2016
Nop9 is a PUF-like protein that prevents premature cleavage to correctly process pre-18S rRNA
Zhang J, McCann KL, Qiu C, Gonzalez LE, Baserga SJ, Hall TM. Nop9 is a PUF-like protein that prevents premature cleavage to correctly process pre-18S rRNA. Nature Communications 2016, 7: 13085. PMID: 27725644, PMCID: PMC5062617, DOI: 10.1038/ncomms13085.Peer-Reviewed Original ResearchConceptsEukaryotic ribosome biogenesisCorrect subcellular locationRibosome assembly factorsPre-ribosomal RNAPumilio repeatsRibosome biogenesisHuman ribosomopathiesAssembly factorsBiogenesis factorsRepeat proteinsMature rRNASubcellular locationNop9RNA complexCleavage siteRRNATimely cleavageProteinStructural featuresFinal processing stepRibosomopathiesBiogenesisCleavageYeastNuclease
2011
The initial U3 snoRNA:pre‐rRNA base‐pairing interaction required for pre‐18S rRNA folding revealed by in vivo chemical probing
Baserga S, Dutca L, Gallagher J. The initial U3 snoRNA:pre‐rRNA base‐pairing interaction required for pre‐18S rRNA folding revealed by in vivo chemical probing. The FASEB Journal 2011, 25: 704.1-704.1. DOI: 10.1096/fasebj.25.1_supplement.704.1.Peer-Reviewed Original ResearchU3 snoRNABase-pairing interactionsSmall subunitRibosomal subunitU3 small nucleolar RNAPre-rRNA foldingVivo chemical probingSmall nucleolar RNAsSmall ribosomal subunitRRNA foldingEukaryotic nucleolusRibosomal proteinsU3 snoRNPCytoplasmic ribosomesNucleolar RNAsGenetic manipulationS. cerevisiaeChemical probingSnoRNAsVivo chemicalRRNAEssential processSubunitsFoldingNucleotide reactivity
2001
An unexpected, conserved element of the U3 snoRNA is required for Mpp10p association.
Wormsley S, Samarsky D, Fournier M, Baserga S. An unexpected, conserved element of the U3 snoRNA is required for Mpp10p association. RNA 2001, 7: 904-19. PMID: 11421365, PMCID: PMC1370138, DOI: 10.1017/s1355838201010238.Peer-Reviewed Original ResearchConceptsU3 snoRNAU3 snoRNPYeast U3 snoRNAU3 small nucleolar ribonucleoproteinSmall nucleolar ribonucleoproteinSmall nucleolar RNAsStretch of nucleotidesHinge regionBase-pairing interactionsRRNA transcriptsNucleolar RNAsNucleolar ribonucleoproteinConserved elementSequence elementsProtein componentsSnoRNAsProcessing reactionsBase pairsMpp10pBase pairingSnoRNPsFunctional centersRRNACritical roleProtein
2000
A nucleolar protein related to ribosomal protein L7 is required for an early step in large ribosomal subunit biogenesis
Dunbar D, Dragon F, Lee S, Baserga S. A nucleolar protein related to ribosomal protein L7 is required for an early step in large ribosomal subunit biogenesis. Proceedings Of The National Academy Of Sciences Of The United States Of America 2000, 97: 13027-13032. PMID: 11087857, PMCID: PMC27172, DOI: 10.1073/pnas.97.24.13027.Peer-Reviewed Original ResearchConceptsNucleolar proteinsLarge ribosomal subunit biogenesisLarge ribosomal subunit RNARibosomal subunit biogenesisRNA-binding domainRibosomal subunit RNAPulse-chase labeling experimentsProcessing of precursorsRibosomal protein L7Subunit biogenesisExonucleolytic trimmingEssential genesRibosomal proteinsSpecificity factorMature rRNAPrecursor RNASpacer 2L7 proteinSubunit RNAEndonucleolytic cleavageProtein L7Extensive identityRRNAMajor substratePrimer extensionFibrillarin-associated Box C/D Small Nucleolar RNAs inTrypanosoma brucei SEQUENCE CONSERVATION AND IMPLICATIONS FOR 2′-O-RIBOSE METHYLATION OF rRNA*
Dunbar D, Wormsley S, Lowe T, Baserga S. Fibrillarin-associated Box C/D Small Nucleolar RNAs inTrypanosoma brucei SEQUENCE CONSERVATION AND IMPLICATIONS FOR 2′-O-RIBOSE METHYLATION OF rRNA*. Journal Of Biological Chemistry 2000, 275: 14767-14776. PMID: 10747997, DOI: 10.1074/jbc.m001180200.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBase SequenceChromosomal Proteins, Non-HistoneCloning, MolecularConserved SequenceDNA PrimersMethylationMolecular Sequence DataPrecipitin TestsRabbitsRiboseRNA, ProtozoanRNA, RibosomalRNA, Small NuclearSequence Homology, Amino AcidSequence Homology, Nucleic AcidTrypanosoma brucei bruceiConceptsRibose methylationBox C/D snoRNAsMethylation guide snoRNAsSmall nucleolar RNAsAncient eukaryotesBrucei extractsComparative genomicsEarly eukaryotesGuide snoRNAsD snoRNAsFibrillarin proteinSequence conservationSnoRNA sequencesNucleolar RNAsNucleotides upstreamBox CBox DSnoRNAsT. bruceiCommon proteinsEukaryotesFibrillarinRNA 1MethylationRRNA