title: A new sigma factor homolog in a cyanobacterium: cloning, sequencing, and light-responsive transcripts of rpoD2 from Microcystis aeruginosa K-81.
abstract: We isolated an rpoD2 gene encoding the potential sigma factor of RNA polymerase from the cyanobacterium Microcystis aeruginosa K-81, which can perform photosynthesis. The deduced amino acid sequence of RpoD2 (sigmaA2) exhibits extensive homology to other eubacterial RpoD proteins. This gene possessed multiple 5'-end transcripts, expressed specifically under light (P(L)), dark (P(D)), or constitutively light/dark (P(C)) conditions during exponential cell growth.
authors.affiliation: Division of Biotechnology, School of Agriculture, Ibaraki University, Ami, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Asayama
authors.forename: A
authors.initials: A
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Nozawa
authors.forename: A
authors.initials: A
authors.lastname: Yamada
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Aida
authors.forename: M
authors.initials: M
authors.lastname: Shirai
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D008027:Light; D046931:Microcystis / Q000201:enzymology / Q000235:genetics* / Q000528:radiation effects; D008969:Molecular Sequence Data; D012329:RNA, Bacterial / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D015183:Restriction Mapping; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012808:Sigma Factor / Q000235:genetics*
chemical_list: D012329:RNA, Bacterial; D012333:RNA, Messenger; D012808:Sigma Factor; C081775:RNA polymerase sigma 70; D012321:DNA-Directed RNA Polymerases