title: Recognition of tRNAPhe by phenylalanyl-tRNA synthetase of Thermus thermophilus.
abstract: The tRNA(Phe) nucleotides required for recognition by phenylalanyl-tRNA synthetase of Thermus thermophilus have been determined using Escherichia coli tRNA(Phe) transcripts with various mutations. The anticodon nucleotides are shown to be the most important recognition elements. The discriminator nucleotide, A73, involved in the recognition set of yeast, E. coli and human phenylalanyl-tRNA synthetases contributes only slightly to tRNA(Phe) recognition by Th. thermophilus phenylalanyl-tRNA synthetase. Nucleotide 20 and some tertiary nucleotides, including the conserved G19.C56 base pair, are proposed to participate in stabilization of the precise tRNA conformation required for efficient aminoacylation. The role of the 3'-CCA terminus, common to all tRNAs, in the specific interaction of tRNA with phenylalanyl-tRNA synthetase is discussed.
authors.affiliation: Laboratory of Bioorganic Chemistry of Enzymes, Novosibirsk Institute of Bioorganic Chemistry, Russia.
authors.forename: N A
authors.initials: NA
authors.lastname: Moor
authors.forename: V N
authors.initials: VN
authors.lastname: Ankilova
authors.forename: O I
authors.initials: OI
authors.lastname: Lavrik
mesh_terms: D000926:Anticodon; D001482:Base Composition; D001483:Base Sequence; D004926:Escherichia coli / Q000235:genetics; D007700:Kinetics; D008274:Magnesium / Q000494:pharmacology; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010649:Phenylalanine / Q000378:metabolism; D010652:Phenylalanine-tRNA Ligase / Q000378:metabolism*; D017354:Point Mutation; D012360:RNA, Transfer, Phe / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D013379:Substrate Specificity; D016963:Thermus thermophilus / Q000201:enzymology*; D014158:Transcription, Genetic
chemical_list: D000926:Anticodon; D012360:RNA, Transfer, Phe; D010649:Phenylalanine; D010652:Phenylalanine-tRNA Ligase; D008274:Magnesium