title: A conserved sequence in internal transcribed spacer 1 of plant nuclear rRNA genes.
abstract: A highly conserved sequence was found in rRNA gene internal transcribed spacer 1 (ITS1) among flowering plant species. The sequence, GGCRY-(4 to 7 n)-GYGYCAAGGAA (where Y = C or T; R = G or A) is located in the central region of ITS1, and is present in published sequences from a wide range of flowering plants. The rest of ITS1 is highly variable in sequence. Therefore, the conserved motif within ITS1 may have a key function in the processing of rRNA gene transcripts. Furthermore, identification of such a conserved motif will help facilitate alignment of sequences for phylogenetic analysis.
authors.affiliation: Department of Plant Pathology, University of Kentucky, Lexington 40546-0091.
authors.forename: J S
authors.initials: JS
authors.lastname: Liu
authors.forename: C L
authors.initials: CL
authors.lastname: Schardl
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D017124:Conserved Sequence; D018744:DNA, Plant / Q000235:genetics* / Q000378:metabolism; D004275:DNA, Ribosomal / Q000235:genetics* / Q000378:metabolism; D017343:Genes, Plant; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010944:Plants / Q000235:genetics* / Q000378:metabolism; D012335:RNA, Ribosomal / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity; D014158:Transcription, Genetic
chemical_list: D018744:DNA, Plant; D004275:DNA, Ribosomal; D012335:RNA, Ribosomal