title: The promoter for the ribosomal RNA genes of Leishmania chagasi.
abstract: A promoter for the rRNA genes of Leishmania chagasi was found to be located about 1 kb upstream of the 18S rRNA coding region and immediately downstream of 64 bp tandem repeats. Its approximate boundaries and corresponding transcription start site were determined by transient transfections and primer extension assays. This promoter for RNA polymerase I has differing activities when transfected into various Leishmania species and no activity in Trypanosoma cruzi. Its sequence has no obvious similarities with other known rRNA promoters in Trypanosomatids. Depending on the species, this promoter can be used to increase expression of a protein from a plasmid in Leishmania by as much as 45-fold over that from a plasmid lacking a promoter.
authors.affiliation: Department of Biochemistry, University of Iowa, Iowa City 52242, USA.
authors.forename: L S
authors.initials: LS
authors.lastname: Gay
authors.forename: M E
authors.initials: ME
authors.lastname: Wilson
authors.forename: J E
authors.initials: JE
authors.lastname: Donelson
mesh_terms: D000818:Animals; D001483:Base Sequence; D016054:DNA, Protozoan / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005786:Gene Expression Regulation / Q000235:genetics; D017125:Genes, Protozoan / Q000235:genetics; D017930:Genes, Reporter; D018314:Leishmania infantum / Q000235:genetics*; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012318:RNA Polymerase I; D016053:RNA, Protozoan / Q000235:genetics*; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D017422:Sequence Analysis, DNA; D014158:Transcription, Genetic / Q000235:genetics
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D016053:RNA, Protozoan; D012337:RNA, Ribosomal, 18S; D008156:Luciferases; D012318:RNA Polymerase I