title: Nucleotide sequence of a principal sigma factor gene (hrdB) of Streptomyces griseus.
abstract: The hrdB homologue was isolated from a streptomycin-producing Streptomyces griseus 2247 strain, which is independent of A-factor. The nucleotide sequence of the cloned DNA fragment revealed the presence of an open reading frame (ORF) of 1,542bp, which predicted a primary product of 514 amino acids and Mr 56,100. The N-terminal sequence of the purified HrdB protein of S. griseus was identical to the amino acid sequence deduced from the nucleotide sequence. The deduced amino acid sequence contains an "rpoD box" conserved in the principal sigma factors of eubacteria, and shows high similarity to the hrdB products of S. coelicolor A3(2)(89.9%) and S. aureofaciens (88.1%). The cloned gene encodes a principal sigma factor of S. griseus. The promoter region was identified by using a promoter-probe vector and by means of primer extensions experiments. The transcription start point is located 158-bp upstream of the initiation codon.
authors.affiliation: Department of Fermentation Technology, Faculty of Engineering, Hiroshima University.
authors.forename: H
authors.initials: H
authors.lastname: Shinkawa
authors.forename: Y
authors.initials: Y
authors.lastname: Hatada
authors.forename: M
authors.initials: M
authors.lastname: Okada
authors.forename: H
authors.initials: H
authors.lastname: Kinashi
authors.forename: O
authors.initials: O
authors.lastname: Nimi
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D004268:DNA-Binding Proteins; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D017386:Sequence Homology, Amino Acid; D012808:Sigma Factor / Q000096:biosynthesis / Q000235:genetics*; D013305:Streptomyces griseus / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D012808:Sigma Factor; C071941:HrdB protein, Streptomyces