2024
The cytidine deaminase APOBEC3A regulates nucleolar function to promote cell growth and ribosome biogenesis
McCool M, Bryant C, Abriola L, Surovtseva Y, Baserga S. The cytidine deaminase APOBEC3A regulates nucleolar function to promote cell growth and ribosome biogenesis. PLOS Biology 2024, 22: e3002718. PMID: 38976757, PMCID: PMC11257408, DOI: 10.1371/journal.pbio.3002718.Peer-Reviewed Original ResearchRibosome biogenesis factorsRibosome biogenesisBiogenesis factorsCell growthNucleolar functionRegulation of nucleolar functionHuman ribosome biogenesisProtein synthesisProduction of ribosomesFamily of proteinsSource of mutagenesisLevel of protein synthesisCytidine deaminase familyIncreased cell growthPromote cell growthPre-rRNAPotential direct rolePre-mRNATransient overexpressionRibosomeGenomic mutationsBiogenesisMCF10A cellsMaturation stepsAPOBEC3A
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
2022
Human pre-60S assembly factors link rRNA transcription to pre-rRNA processing
McCool M, Buhagiar A, Bryant C, Ogawa L, Abriola L, Surovtseva Y, Baserga S. Human pre-60S assembly factors link rRNA transcription to pre-rRNA processing. RNA 2022, 29: rna.079149.122. PMID: 36323459, PMCID: PMC9808572, DOI: 10.1261/rna.079149.122.Peer-Reviewed Original ResearchRRNA transcriptionRRNA processingRibosomal subunit biogenesisRNA polymerase IRibosome biosynthesisSubunit biogenesisRibosome biogenesisRibosome assemblyAssembly factorsTranscription controlBiogenesis factorsRRNA productionSteady-state levelsRNA transcriptionPolymerase IComplex membersHuman cellsProtein synthesisP53 stabilizationTranscriptionEssential processBiogenesisCell proliferationDual roleRegulatory detailsA high-throughput assay for directly monitoring nucleolar rRNA biogenesis
Bryant CJ, McCool MA, Abriola L, Surovtseva YV, Baserga SJ. A high-throughput assay for directly monitoring nucleolar rRNA biogenesis. Open Biology 2022, 12: 210305. PMID: 35078352, PMCID: PMC8790372, DOI: 10.1098/rsob.210305.Peer-Reviewed Original ResearchConceptsRibosome biogenesisRRNA biogenesisNucleolar functionSiRNA controlRNA polymerase 1Nucleolar protein fibrillarinPutative small molecule inhibitorsHigh-throughput primary screensHigh-throughput assaysSmall molecule inhibitorsProtein fibrillarinBiogenesisBMH-21Polymerase-1FibrillarinPrimary screenPrimary assayNucleoliAssaysMorphological alterationsRNAP1RibosomopathiesHitsBiological underpinningsDirect quantification
2021
Increased numbers of nucleoli in a genome-wide RNAi screen reveal proteins that link the cell cycle to RNA polymerase I transcription
Ogawa LM, Buhagiar AF, Abriola L, Leland BA, Surovtseva YV, Baserga SJ. Increased numbers of nucleoli in a genome-wide RNAi screen reveal proteins that link the cell cycle to RNA polymerase I transcription. Molecular Biology Of The Cell 2021, 32: 956-973. PMID: 33689394, PMCID: PMC8108525, DOI: 10.1091/mbc.e20-10-0670.Peer-Reviewed Original ResearchConceptsRNA polymerase INumber of nucleoliRibosome biogenesisNucleolar organizer regionsPolymerase ICell cycleRNA polymerase I transcriptionPolymerase I transcriptionCell cycle regulationHigh-throughput quantitative imagingHuman diploid genomeIdentification of proteinsEukaryotic cellsG2/M phaseDiploid genomeNuclear condensatesRibosomal DNACycle regulationHuman breast epithelial cell lineBreast epithelial cell lineI transcriptionNovel regulatorEpithelial cell lineCycle progressionFunctional analysis