2023
Dual incorporation of non-canonical amino acids enables production of post-translationally modified selenoproteins
Morosky P, Comyns C, Nunes L, Chung C, Hoffmann P, Söll D, Vargas-Rodriguez O, Krahn N. Dual incorporation of non-canonical amino acids enables production of post-translationally modified selenoproteins. Frontiers In Molecular Biosciences 2023, 10: 1096261. PMID: 36762212, PMCID: PMC9902344, DOI: 10.3389/fmolb.2023.1096261.Peer-Reviewed Original ResearchPost-translational modificationsGenetic code expansionAmino acidsProtein functionCode expansionNon-canonical amino acidsGenetic code expansion techniqueOrthogonal translation systemSkeletal muscle regenerationSelenoprotein functionCell maintenanceBiosynthesis mechanismGenetic systemSelenocysteine insertionPreferred hostMultiple proteinsBiological processesBiology applicationsProtein positionsStop codonCodon sequenceProtein sitesSelenoproteinsChemical biology applicationsMuscle regeneration
2022
Uncovering translation roadblocks during the development of a synthetic tRNA
Prabhakar A, Krahn N, Zhang J, Vargas-Rodriguez O, Krupkin M, Fu Z, Acosta-Reyes FJ, Ge X, Choi J, Crnković A, Ehrenberg M, Puglisi EV, Söll D, Puglisi J. Uncovering translation roadblocks during the development of a synthetic tRNA. Nucleic Acids Research 2022, 50: 10201-10211. PMID: 35882385, PMCID: PMC9561287, DOI: 10.1093/nar/gkac576.Peer-Reviewed Original ResearchConceptsOrthogonal translation systemGenetic code expansionCode expansionTertiary interactionsNon-canonical amino acidsAminoacyl-tRNA substratesDomains of lifeAminoacyl-tRNA synthetaseTranslation systemSingle nucleotide mutationsSingle-molecule fluorescenceDistinct tRNAsNon-canonical structuresSelenocysteine insertionRibosomal translationTRNARibosomesSynthetic tRNANucleotide mutationsAmino acidsSame organismP siteOrganismsTranslocationTranslationThe tRNA discriminator base defines the mutual orthogonality of two distinct pyrrolysyl-tRNA synthetase/tRNAPyl pairs in the same organism
Zhang H, Gong X, Zhao Q, Mukai T, Vargas-Rodriguez O, Zhang H, Zhang Y, Wassel P, Amikura K, Maupin-Furlow J, Ren Y, Xu X, Wolf YI, Makarova KS, Koonin EV, Shen Y, Söll D, Fu X. The tRNA discriminator base defines the mutual orthogonality of two distinct pyrrolysyl-tRNA synthetase/tRNAPyl pairs in the same organism. Nucleic Acids Research 2022, 50: gkac271-. PMID: 35466371, PMCID: PMC9071458, DOI: 10.1093/nar/gkac271.Peer-Reviewed Original ResearchConceptsGenetic code expansionCode expansionDistinct non-canonical amino acidsOrthogonal aminoacyl-tRNA synthetase/tRNA pairsAminoacyl-tRNA synthetase/tRNA pairsPyrrolysyl-tRNA synthetase/Halophilic archaeon Haloferax volcaniiAdditional coding capacityDistinct noncanonical amino acidsNon-canonical amino acidsArchaeon Haloferax volcaniiDiscriminator baseAmino acidsPyrrolysyl-tRNA synthetaseNoncanonical amino acidsSite-specific incorporationMotif 2 loopSingle base changeDistinct tRNAsTRNA pairsHaloferax volcaniiUAA codonGenetic codeDiscriminator basesTRNA structure
2020
Initiation of Protein Synthesis with Non‐Canonical Amino Acids In Vivo
Tharp J, Ad O, Amikura K, Ward F, Garcia E, Cate J, Schepartz A, Söll D. Initiation of Protein Synthesis with Non‐Canonical Amino Acids In Vivo. Angewandte Chemie 2020, 132: 3146-3150. DOI: 10.1002/ange.201914671.Peer-Reviewed Original ResearchNon-canonical amino acidsDistinct non-canonical amino acidsE. coli translational machineryAmino acidsNon-canonical initiationTRNA fMetTranslational machineryInitiator tRNASynthetic biologyE. coli strainsProtein synthesisDiverse sidechainsColi strainsFMetRemarkable versatilityVivoInitial stepSecond positionGenomeTyrRSTRNARedundant copiesMachineryBiologyPolypeptide
2006
Mischarging of M. barkeri tRNAPyl with alanine and serine in vitro
Li D, Polycarpo C, Ambrogelly A, Söll D. Mischarging of M. barkeri tRNAPyl with alanine and serine in vitro. The FASEB Journal 2006, 20: a503-a503. DOI: 10.1096/fasebj.20.4.a503-c.Peer-Reviewed Original ResearchNon-canonical amino acidsSecondary structureCognate tRNA speciesPyrrolysyl-tRNA synthetaseAminoacyl-tRNA synthetaseSimilar secondary structureBovine mitochondriaTRNA speciesAlanine tRNAAnticodon stemAcceptor stemAmino acidsM. barkeriMethanosarcina barkeriSerRSsPyrrolysineMultiple mutationsVariable loopSynthetaseSerineShorter variable loopsSynthetase systemBarkeriAlanineStem