title: The plastid chromosome of spinach (Spinacia oleracea): complete nucleotide sequence and gene organization.
abstract: The chloroplast chromosome of spinach (Spinacia oleracea) is a double-stranded circular DNA molecule of 150,725 nucleotide pairs. A comparison of this chromosome with those of the three other autotrophic dicotyledons for which complete DNA sequences of plastid chromosomes are available confirms a conserved overall structure. Three classes of open reading frames were distinguished: (1) genes of known function which include 108 unique loci, (2) three hypothetical chloroplast reading frames (ycfs) that are highly conserved interspecifically, and (3) species-specific or rapidly diverging 'open reading frames'. A detailed transcript study of one of the latter (ycf15) shows that these loci may be transcribed, but do not constitute protein-coding genes.
authors: Botanisches Institut der Ludwig-Maximilians-Universität, München, Germany.
authors: C
authors: C
authors: Schmitz-Linneweber
authors: R M
authors: RM
authors: Maier
authors: J P
authors: JP
authors: Alcaraz
authors: A
authors: A
authors: Cottet
authors: R G
authors: RG
authors: Herrmann
authors: R
authors: R
authors: Mache
mesh_terms: D001483:Base Sequence; D018742:DNA, Chloroplast / Q000737:chemistry / Q000235:genetics*; D004270:DNA, Circular / Q000235:genetics; D017343:Genes, Plant / Q000235:genetics; D008969:Molecular Sequence Data; D016366:Open Reading Frames / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D018724:Spinacia oleracea / Q000235:genetics*
chemical_list: D018742:DNA, Chloroplast; D004270:DNA, Circular