title: Sequence and transcriptional studies of five clustered flagellin genes from hyperthermophilic archaeon Pyrococcus kodakaraensis KOD1.
abstract: Five clustered genes (flaB1, flaB2, flaB3, flaB4 and flaB5) for multiple subunits of flagellar filaments from hyperthermophilic archaeon Pyrococcus kodakaraensis KOD1 were cloned and sequenced. Deduced amino acid sequences were aligned and it was revealed that five flagellin genes are homologous especially in the N-terminal hydrophobic region which might be important for interaction among flagellin subunits. Phylogenetic analysis was performed among archaeal flagellins from methanogens, an extreme halophile and our hyperthermophile, indicating that KOD1 flagellins were grouped together with methanogenic counterparts and were distinguishable from halophilic flagellins. Northern analysis of transcripts from flagellin genes from P. kodakaraensis KOD1 revealed that four major transcripts (0.98, 3.7, 5.4 and 9.2 kb) initiating from immediately upstream of flaB1 encode different combinations of five flagellins.
authors.affiliation: Department of Biotechnology, Graduate School of Engineering, Osaka University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nagahisa
authors.forename: S
authors.initials: S
authors.lastname: Ezaki
authors.forename: S
authors.initials: S
authors.lastname: Fujiwara
authors.forename: T
authors.initials: T
authors.lastname: Imanaka
authors.forename: M
authors.initials: M
authors.lastname: Takagi
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D005408:Flagellin / Q000235:genetics*; D019766:Genes, Archaeal; D008969:Molecular Sequence Data; D010802:Phylogeny; D019711:Pyrococcus / Q000737:chemistry / Q000235:genetics*; D019642:RNA, Archaeal / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014158:Transcription, Genetic
chemical_list: D019642:RNA, Archaeal; D005408:Flagellin