2017
The proteome and transcriptome of the infectious metacyclic form of Trypanosoma brucei define quiescent cells primed for mammalian invasion
Christiano R, Kolev NG, Shi H, Ullu E, Walther TC, Tschudi C. The proteome and transcriptome of the infectious metacyclic form of Trypanosoma brucei define quiescent cells primed for mammalian invasion. Molecular Microbiology 2017, 106: 74-92. PMID: 28742275, PMCID: PMC5607103, DOI: 10.1111/mmi.13754.Peer-Reviewed Original ResearchConceptsInfectious metacyclic formsTsetse fly vectorMetacyclic formsVariant surface glycoprotein expression sitesQuiescent cellsGene expression profilesFly vectorsAvailability of nutrientsMammalian invasionsCell surface componentsCell divisionProcyclic trypanosomesMammalian hostsTrypanosoma bruceiMRNA sequencingExpression profilesExpression sitesMetabolic enzymesBloodstream formsInfectious metacyclicsProtein 6TranscriptomeTsetse fliesProteomeProtein levels
2015
Synchronous expression of individual metacyclic variant surface glycoprotein genes in Trypanosoma brucei
Ramey-Butler K, Ullu E, Kolev NG, Tschudi C. Synchronous expression of individual metacyclic variant surface glycoprotein genes in Trypanosoma brucei. Molecular And Biochemical Parasitology 2015, 200: 1-4. PMID: 25896436, PMCID: PMC4470760, DOI: 10.1016/j.molbiopara.2015.04.001.Peer-Reviewed Original ResearchConceptsVariant surface glycoproteinMetacyclic variant surface glycoproteinInfectious metacyclic formsVariant surface glycoprotein genesVSG gene expressionSurface glycoprotein genesNew mammalian hostInsect vectorsParasite biologyMammalian hostsDifferentiation systemGene expressionTsetse vectorBloodstream trypanosomesDifferential expressionGlycoprotein geneProtein 6Molecular aspectsIndividual cellsMetacyclic formsBlood mealProtein levelsDiscrete populationsSurface glycoproteinLife cycle
2010
The Transcriptome of the Human Pathogen Trypanosoma brucei at Single-Nucleotide Resolution
Kolev NG, Franklin JB, Carmi S, Shi H, Michaeli S, Tschudi C. The Transcriptome of the Human Pathogen Trypanosoma brucei at Single-Nucleotide Resolution. PLOS Pathogens 2010, 6: e1001090. PMID: 20838601, PMCID: PMC2936537, DOI: 10.1371/journal.ppat.1001090.Peer-Reviewed Original ResearchMeSH KeywordsBase SequenceGene Expression ProfilingGenome, BacterialHigh-Throughput Nucleotide SequencingHumansMolecular Sequence DataRNA Polymerase IIRNA PrecursorsRNA, BacterialSequence Homology, Nucleic AcidTranscription Initiation SiteTranscription, GeneticTrypanosoma brucei bruceiTrypanosomiasis, AfricanConceptsGene clusterNew transcriptsHigh-throughput RNA sequencingInitiation siteOrganization of genesRNA polymerase IISimilar genome organizationPutative initiation siteSingle-nucleotide resolutionTranscription initiation siteGene expression patternsPre-mRNA processingNon-coding RNAsGenome organizationPolymerase IIGenomic mapTranscription initiationInsect vectorsEukaryotic promotersMass spectrometry analysisImportant human pathogenMammalian hostsRNA sequencingTrypanosoma bruceiT. brucei
2009
Distinct and overlapping roles for two Dicer-like proteins in the RNA interference pathways of the ancient eukaryote Trypanosoma brucei
Patrick KL, Shi H, Kolev NG, Ersfeld K, Tschudi C, Ullu E. Distinct and overlapping roles for two Dicer-like proteins in the RNA interference pathways of the ancient eukaryote Trypanosoma brucei. Proceedings Of The National Academy Of Sciences Of The United States Of America 2009, 106: 17933-17938. PMID: 19815526, PMCID: PMC2764927, DOI: 10.1073/pnas.0907766106.Peer-Reviewed Original ResearchConceptsDicer-like enzymesRNA interferenceRNAi pathwayBiogenesis of siRNAsDicer-like proteinsNuclear RNAi pathwaySingle Argonaute proteinEnd modificationReverse genetic analysisRNAi-deficient cellsRNA interference (RNAi) pathwayWild-type cellsAncient eukaryotesArgonaute proteinsRNAi responseAncient traitRepeat transcriptsInterference pathwayCytoplasmic proteinsImportant human pathogenTrypanosoma bruceiGenetic analysisRNAi triggersFunctional analysisIntermediate transcriptssnoRNAs in Giardia lamblia: a novel role in RNA silencing?
Kolev NG, Ullu E. snoRNAs in Giardia lamblia: a novel role in RNA silencing? Trends In Parasitology 2009, 25: 348-350. PMID: 19616476, DOI: 10.1016/j.pt.2009.05.001.Peer-Reviewed Original Research
2008
Conserved motifs in both CPSF73 and CPSF100 are required to assemble the active endonuclease for histone mRNA 3′‐end maturation
Kolev NG, Yario TA, Benson E, Steitz JA. Conserved motifs in both CPSF73 and CPSF100 are required to assemble the active endonuclease for histone mRNA 3′‐end maturation. EMBO Reports 2008, 9: 1013-1018. PMID: 18688255, PMCID: PMC2572124, DOI: 10.1038/embor.2008.146.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid MotifsAmino Acid SequenceBase SequenceCell LineCleavage And Polyadenylation Specificity FactorConserved SequenceEndonucleasesEnzyme ActivationHeLa CellsHistonesHumansMolecular Sequence DataProtein Structure, TertiaryProtein SubunitsRNA 3' End ProcessingRNA PrecursorsRNA, MessengerConceptsPre-messenger RNAPolyadenylation specificity factorMammalian proteinsRNase ZConserved motifsHistone mRNASpecificity factorEndonucleolytic cleavageActive endonucleaseEndonuclease activityMBL familyComplex machineryMessenger RNAPoint mutationsCPSF73CPSF100Process of maturationMaturation processRNAProteinMotifMRNAMaturationEukaryotesCleavage
2005
Symplekin and multiple other polyadenylation factors participate in 3′-end maturation of histone mRNAs
Kolev NG, Steitz JA. Symplekin and multiple other polyadenylation factors participate in 3′-end maturation of histone mRNAs. Genes & Development 2005, 19: 2583-2592. PMID: 16230528, PMCID: PMC1276732, DOI: 10.1101/gad.1371105.Peer-Reviewed Original ResearchConceptsTail elongationU7 small nuclear ribonucleoproteinCommon molecular machineryMammalian cell extractsCleavage stimulation factorPolyadenylation specificity factorSmall nuclear ribonucleoproteinMolecular machineryHistone mRNAProtein complexesMRNA cleavageSpecificity factorPolyadenylation factorsTranslational activationNuclear ribonucleoproteinSymplekinReconstitution experimentsCell extractsHeat-labile factorMessenger RNAHistonesMRNAStimulation factorSubunitsCytoplasmic