title: Primary structure and promoter analysis of leghemoglobin genes of the stem-nodulated tropical legume Sesbania rostrata: conserved coding sequences, cis-elements and trans-acting factors.
abstract: The primary structure of a leghemoglobin (lb) gene from the stem-nodulated, tropical legume Sesbania rostrata and two lb gene promoter regions was analysed. The S. rostrata lb gene structure and Lb amino acid composition were found to be highly conserved with previously described lb genes and Lb proteins. Distinct DNA elements were identified in the S. rostrata lb promoter regions, which share a high degree of homology with cis-active regulatory elements found in the soybean (Glycine max) lbc3 promoter. One conserved DNA element was found to interact specifically with an apparently universal, trans-acting factor present in nuclear extracts of nodules. These results suggest a conserved mechanism for nodule specific induction of lb genes in leguminous plants.
authors.affiliation: Max-Planck-Institut für Züchtungsforschung, Abteilung Genetische Grundlagen der Pflanzenzüchtung, Köln, Federal Republic of Germany.
authors.forename: B A
authors.initials: BA
authors.lastname: Metz
authors.forename: P
authors.initials: P
authors.lastname: Welters
authors.forename: H J
authors.initials: HJ
authors.lastname: Hoffmann
authors.forename: E O
authors.initials: EO
authors.lastname: Jensen
authors.forename: J
authors.initials: J
authors.lastname: Schell
authors.forename: F J
authors.initials: FJ
authors.lastname: de Bruijn
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D015139:Blotting, Southern; D007887:Fabaceae / Q000235:genetics; D005796:Genes; D006420:Hemeproteins / Q000235:genetics*; D007438:Introns; D007874:Leghemoglobin / Q000235:genetics*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010944:Plants / Q000235:genetics*; D010946:Plants, Medicinal; D011401:Promoter Regions, Genetic; D012689:Sequence Homology, Nucleic Acid
chemical_list: D006420:Hemeproteins; D007874:Leghemoglobin