title: The atpB and rbcL promoters in plastid DNAs of a wide dicot range.
abstract: The plastid atpB-rbcL intergene has been analyzed within a wide range of plants covering the major dicot lineages. New sequences from 13 plant species were determined and aligned with three already-known sequences. The promoters of the rbcL and the atpB genes were localized and analyzed according to published observations in spinach and tobacco. The evolutionary conservation of two atpB promoters, separated by 113-262 nucleotides, is strong support that both are functionally active, and it also allows a discrimination between the previously reported atpB transcripts. Moreover, the radically distinct sequences of the two atpB promoters suggest that they interact with two distinct initiation complexes. The alignment also confirms the much higher conservation of the leader sequence in the rbcL mRNA than in the atpB mRNA among dicots, presuming a function at the posttranscriptional level.
authors.affiliation: Conservatoire et Jardin Botaniques, Geneva, Switzerland.
authors.forename: J F
authors.initials: JF
authors.lastname: Manen
authors.forename: V
authors.initials: V
authors.lastname: Savolainen
authors.forename: P
authors.initials: P
authors.lastname: Simon
mesh_terms: D001483:Base Sequence; D002736:Chloroplasts; D017343:Genes, Plant; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D010944:Plants / Q000145:classification / Q000235:genetics*; D018087:Plastids; D011401:Promoter Regions, Genetic; D021382:Protein Sorting Signals / Q000235:genetics; D006180:Proton-Translocating ATPases / Q000235:genetics*; D012273:Ribulose-Bisphosphate Carboxylase / Q000235:genetics*; D016415:Sequence Alignment; D013045:Species Specificity
chemical_list: D010940:Plant Proteins; D021382:Protein Sorting Signals; D006180:Proton-Translocating ATPases; D012273:Ribulose-Bisphosphate Carboxylase