2025
Deep mutational scanning of the Trypanosoma brucei developmental regulator RBP6 reveals an essential disordered region influenced by positive residues
Rojas-Sánchez S, Kolev N, Tschudi C. Deep mutational scanning of the Trypanosoma brucei developmental regulator RBP6 reveals an essential disordered region influenced by positive residues. Nature Communications 2025, 16: 1168. PMID: 39885181, PMCID: PMC11782513, DOI: 10.1038/s41467-025-56553-y.Peer-Reviewed Original ResearchConceptsN-terminal intrinsically disordered regionRNA binding protein 6RNA recognition motifDeep mutational scanningMutational scanningDisordered regionsProtein-RNA interactionsIntrinsically disordered regionsComplex developmental programPositively charged residuesSingle-point variantsProtein-RNARNA recognitionDeleterious mutationsMutational constraintsProcyclic formsAnimal African trypanosomiasisTrypanosoma bruceiCharged residuesPrimary structureRegained infectivityDevelopmental programRegulatory roleProtein 6Positive residues
2017
Metacyclic VSG expression site promoters are recognized by the same general transcription factor that is required for RNA polymerase I transcription of bloodstream expression sites
Kolev NG, Günzl A, Tschudi C. Metacyclic VSG expression site promoters are recognized by the same general transcription factor that is required for RNA polymerase I transcription of bloodstream expression sites. Molecular And Biochemical Parasitology 2017, 216: 52-55. PMID: 28716719, PMCID: PMC5582990, DOI: 10.1016/j.molbiopara.2017.07.002.Peer-Reviewed Original ResearchConceptsBloodstream VSG expression sitesVSG expression sitesVSG ES promoterExpression sitesPol IVSG genesES promoterRNA polymerase I transcriptionGeneral transcription factorsBloodstream expression sitesVariant surface glycoprotein (VSG) coatPolymerase I transcriptionRNA polymerase IDistinct promoter sequencesMetacyclic VSG geneTrypanosoma brucei cellsProcyclin genesTypes of promotersBrucei cellsDevelopmental programDistinct binding affinitiesTranscription factorsI transcriptionInitiation factorsPromoter sequences
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