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
2016
Transcriptome Profiling of Trypanosoma brucei Development in the Tsetse Fly Vector Glossina morsitans
Savage AF, Kolev NG, Franklin JB, Vigneron A, Aksoy S, Tschudi C. Transcriptome Profiling of Trypanosoma brucei Development in the Tsetse Fly Vector Glossina morsitans. PLOS ONE 2016, 11: e0168877. PMID: 28002435, PMCID: PMC5176191, DOI: 10.1371/journal.pone.0168877.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsElectron Transport Complex IVGene Expression ProfilingGene LibraryHigh-Throughput Nucleotide SequencingInsect VectorsIntestinal MucosaLife Cycle StagesMembrane GlycoproteinsProtozoan ProteinsProventriculusSalivary GlandsSequence Analysis, RNATranscriptomeTrypanosoma brucei bruceiTsetse FliesUp-RegulationConceptsSalivary gland transcriptomeMetacyclic VSGsInsect vectorsHigh-throughput RNA sequencingBlood-feeding tsetse fliesDigenetic life cycleRNA-binding proteinGene ontology analysisAlanine-rich proteinCytochrome oxidase complexTsetse fliesMidgut transcriptomeGlobal regulatorDNA metabolismTrypanosome developmentOntology analysisDNA replicationSignal transductionTransporter familyMammalian hostsRNA sequencingDistinct tissuesTranscript levelsTranscriptomeRich protein
2012
Developmental Progression to Infectivity in Trypanosoma brucei Triggered by an RNA-Binding Protein
Kolev NG, Ramey-Butler K, Cross GA, Ullu E, Tschudi C. Developmental Progression to Infectivity in Trypanosoma brucei Triggered by an RNA-Binding Protein. Science 2012, 338: 1352-1353. PMID: 23224556, PMCID: PMC3664091, DOI: 10.1126/science.1229641.Peer-Reviewed Original Research
2011
RNA Interference in Protozoan Parasites: Achievements and Challenges
Kolev NG, Tschudi C, Ullu E. RNA Interference in Protozoan Parasites: Achievements and Challenges. MSphere 2011, 10: 1156-1163. PMID: 21764910, PMCID: PMC3187059, DOI: 10.1128/ec.05114-11.Peer-Reviewed Original Research
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
A manganese-dependent ribozyme in the 3′-untranslated region of Xenopus Vg1 mRNA
Kolev NG, Hartland EI, Huber PW. A manganese-dependent ribozyme in the 3′-untranslated region of Xenopus Vg1 mRNA. Nucleic Acids Research 2008, 36: 5530-5539. PMID: 18753150, PMCID: PMC2553595, DOI: 10.1093/nar/gkn530.Peer-Reviewed Original ResearchMinor-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
2006
In vivo assembly of functional U7 snRNP requires RNA backbone flexibility within the Sm-binding site
Kolev NG, Steitz JA. In vivo assembly of functional U7 snRNP requires RNA backbone flexibility within the Sm-binding site. Nature Structural & Molecular Biology 2006, 13: 347-353. PMID: 16547514, DOI: 10.1038/nsmb1075.Peer-Reviewed Original Research
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
2003
VgRBP71 Stimulates Cleavage at a Polyadenylation Signal in Vg1 mRNA, Resulting in the Removal of a cis-Acting Element that Represses Translation
Kolev NG, Huber PW. VgRBP71 Stimulates Cleavage at a Polyadenylation Signal in Vg1 mRNA, Resulting in the Removal of a cis-Acting Element that Represses Translation. Molecular Cell 2003, 11: 745-755. PMID: 12667456, DOI: 10.1016/s1097-2765(03)00071-6.Peer-Reviewed Original Research3' Untranslated RegionsAnimalsBase SequenceBinding SitesBinding, CompetitiveBlotting, WesternGlutathione TransferaseGlycoproteinsMolecular Sequence DataNucleic Acid ConformationOocytesPlasmidsPolymerase Chain ReactionProtein BindingProtein BiosynthesisProtein Structure, SecondaryReverse Transcriptase Polymerase Chain ReactionRibonucleasesRNARNA HelicasesRNA, MessengerRNA-Binding ProteinsTranscription, GeneticTransforming Growth Factor betaXenopusXenopus Proteins