title: Isolation and characterization of promoter regions from Streptococcus gordonii CH1.
abstract: We aimed to identify transcription signal sequences from Streptococcus gordonii strain CH1 by random chromosomal cloning. Five genomic fragments from a Sau3A digest, which constitutively activated transcription of a promoterless spectinomycin resistance gene in this strain, were isolated and characterized. Additionally, one promoter fragment was isolated that was specifically activated under iron-limiting conditions. A sequence motif with similarity to the consensus for Fur-binding regulatory DNA sequences (Fur box) in Escherichia coli was detected within the putative promoter region. The open reading frame downstream of this region possibly encodes a transmembrane protein involved in iron uptake.
authors.affiliation: Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
authors.forename: A J
authors.initials: AJ
authors.lastname: Vriesema
authors.forename: J
authors.initials: J
authors.lastname: Dankert
authors.forename: S A
authors.initials: SA
authors.lastname: Zaat
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D004269:DNA, Bacterial / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D007501:Iron / Q000378:metabolism; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics*; D017422:Sequence Analysis, DNA; D013291:Streptococcus / Q000235:genetics* / Q000254:growth & development; D014158:Transcription, Genetic
chemical_list: D004269:DNA, Bacterial; D007501:Iron