2020
Visualizing group II intron dynamics between the first and second steps of splicing
Manigrasso J, Chillón I, Genna V, Vidossich P, Somarowthu S, Pyle AM, De Vivo M, Marcia M. Visualizing group II intron dynamics between the first and second steps of splicing. Nature Communications 2020, 11: 2837. PMID: 32503992, PMCID: PMC7275048, DOI: 10.1038/s41467-020-16741-4.Peer-Reviewed Original ResearchConceptsGroup II intron splicingGroup II intronsSelf-splicing ribozymesGene-editing toolsIntron dynamicsEukaryotic spliceosomeActive site dynamicsIntron splicingRetrotransposable elementsCatalytic triadSplicingMolecular machinesConformational changesFirst residueMultiple conformationsSite dynamicsSpliceosomeIntronsStructural rearrangementsX-ray crystallographyEnzymatic assayStructural dataEnzymatic strategyFunctional dataActive site
2014
Principles of ion recognition in RNA: insights from the group II intron structures
Marcia M, Pyle AM. Principles of ion recognition in RNA: insights from the group II intron structures. RNA 2014, 20: 516-527. PMID: 24570483, PMCID: PMC3964913, DOI: 10.1261/rna.043414.113.Peer-Reviewed Original ResearchConceptsActive siteSite-bound ionsIon recognitionMetal ionsOrganic ionsLatter ionIon-binding sitesCatalytic ionsCrystal structureGU wobble pairsMonovalent ionsLarge RNA moleculesIonsStructural ionsBiophysical methodsGroup II intron structureGA mismatchesLong-range tertiary contactsRNA structureRNA foldingTertiary contactsWobble pairStructureCatalysisHeteronuclear
2004
Solution structure of domain 5 of a group II intron ribozyme reveals a new RNA motif
Sigel RK, Sashital DG, Abramovitz DL, Palmer AG, Butcher SE, Pyle AM. Solution structure of domain 5 of a group II intron ribozyme reveals a new RNA motif. Nature Structural & Molecular Biology 2004, 11: 187-192. PMID: 14745440, DOI: 10.1038/nsmb717.Peer-Reviewed Original ResearchConceptsGroup II intron ribozymeMetal ion titrationsSolution structureMetal ion bindingDivalent metal ionsMetal ion-binding sitesRibozyme active siteBackbone substituentsMetal ionsMajor groove faceIon-binding sitesIon titrationActive siteIon bindingSyn conformationIntron ribozymesMinor groove sideAGC triadNew RNA motifMajor grooveGroove faceStrong Mg2Catalytic triadGroove sideCentral core
1994
Building a kinetic framework for group II intron ribozyme activity: quantitation of interdomain binding and reaction rate.
Pyle AM, Green JB. Building a kinetic framework for group II intron ribozyme activity: quantitation of interdomain binding and reaction rate. Biochemistry 1994, 33: 2716-25. PMID: 8117737, DOI: 10.1021/bi00175a047.Peer-Reviewed Original ResearchConceptsGeneral base catalysisChemical stepLinear rangeMichaelis-Menten mechanismSplice-site hydrolysisMultiple-turnover kinetic analysesPH/rate profileEnergetic stabilizationBase catalysisActive siteGel filtration chromatographyRibozyme kineticsReaction rateFiltration chromatographySpecific hydrolysisKinetic frameworkKinetic analysisHydrolysisReactionLower Km valuesBase pairingRibozyme activityKcat