title: Long tandemly repeated repetitive (LTRR) sequences in the filamentous cyanobacterium Anabaena sp. PCC 7120.
abstract: Nucleotide sequence analysis of the DNA region carrying transposon Tn5-1087b from the Anabaena 7120 nitrogen fixation-deficient mutant YC16 revealed the presence of a novel repeated DNA element in cyanobacteria designated long tandemly repeated repetitive (LTRR) sequence. The LTRR element is 37 bp long and contains an inverted repeat sequence. 17 copies of the LTRR element, 13 of which were completely identical, were identified within a 1.3 kb DNA fragment, which was flanked by two divergently transcribed genes homologous to bacteriophage T4 'gene 15' and Rhizobium meliloti exoD, respectively. LTRR-like sequences occur in several DNA regions in Anabaena 7120 and in other cyanobacteria. Furthermore, the presence of an LTRR-like DNA region in mitochondrial plasmids of Vicia faba indicates strong conservation of such structures during evolution.
authors.affiliation: Botanisches Institut, Universität Bonn, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Masepohl
authors.forename: K
authors.initials: K
authors.lastname: Görlitz
authors.forename: H
authors.initials: H
authors.lastname: Böhme
mesh_terms: D000595:Amino Acid Sequence; D017033:Anabaena / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D003001:Cloning, Molecular; D017403:In Situ Hybridization; D008969:Molecular Sequence Data; D009154:Mutation; D009584:Nitrogen / Q000378:metabolism; D012091:Repetitive Sequences, Nucleic Acid; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D009584:Nitrogen