1998
Retracing the evolution of amino acid specificity in glutaminyl‐tRNA synthetase
Hong K, Ibba M, Söll D. Retracing the evolution of amino acid specificity in glutaminyl‐tRNA synthetase. FEBS Letters 1998, 434: 149-154. PMID: 9738468, DOI: 10.1016/s0014-5793(98)00968-5.Peer-Reviewed Original ResearchConceptsGlutaminyl-tRNA synthetaseTranslational error rateMolecular phylogenetic studiesAmino acid specificityGlutamyl-tRNA synthetaseFirst biochemical evidenceCellular growth ratePhe-90Phylogenetic studiesSynthetase mutantsTyr-240SynthetaseBiochemical evidenceVivo expressionGenesGlutamic acidActive siteGrowth rateMisacylationMutantsMutagenesisDuplicationDiversificationResiduesKey step
1988
Site-directed mutagenesis to fine-tune enzyme specificity
Uemura H, Rogers M, Swanson R, Watson L, Söll D. Site-directed mutagenesis to fine-tune enzyme specificity. Protein Engineering Design And Selection 1988, 2: 293-296. PMID: 3150543, DOI: 10.1093/protein/2.4.293.Peer-Reviewed Original ResearchConceptsOligonucleotide-directed mutagenesisEscherichia coli glutaminyl-tRNA synthetaseGenetic selectionGlutaminyl-tRNA synthetaseAmino acid replacementsSite-directed mutagenesisAcid replacementsEnzyme specificitySingle residueMutagenesisSide chainsRepulsive charge-charge interactionsSpecific recognitionCharge-charge interactionsNucleic acidsMutantsProteinSupFSynthetaseResiduesGlutamineSelection