title: Cloning and sequence analysis of the 18 S ribosomal RNA gene of tomato and a secondary structure model for the 18 S rRNA of angiosperms.
abstract: The gene of a cytoplasmic 18 S ribosomal RNA (18 S rDNA) of the dicotyledonous plant tomato (Lycopersicon esculentum) cv. Rentita has been cloned, and its complete primary structure has been determined. The tomato 18 S rDNA is 1805 bp long with a G + C content of 49.6%. Its sequence exhibits 94%-96% positional identity when it is colinearly aligned with the previously reported sequences of the 17-18 S rDNAs of the dicot soybean and the monocots maize and rice. A model of the secondary structure of the 18 S rRNA of angiosperms is presented and its genera-specific structural features are compared with a current eukaryotic 18 S rRNA consensus model.
authors.affiliation: Max-Planck-Institut für Biochemie, Abteilung Viroidforschung, Martinsried, Federal Republic of Germany.
authors.forename: W
authors.initials: W
authors.lastname: Schmidt-Puchta
authors.forename: G
authors.initials: G
authors.lastname: Kütemeier
authors.forename: I
authors.initials: I
authors.lastname: Günther
authors.forename: B
authors.initials: B
authors.lastname: Haas
authors.forename: H L
authors.initials: HL
authors.lastname: Sänger
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010944:Plants / Q000235:genetics*; D012335:RNA, Ribosomal / Q000235:genetics*; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid
chemical_list: D012335:RNA, Ribosomal; D012337:RNA, Ribosomal, 18S