Sequence and transcriptional studies of five clustered flagellin genes from hyperthermophilic archaeon Pyrococcus kodakaraensis KOD1
Keisuke Nagahisa
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for more papers by this authorSatoshi Ezaki
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
Search for more papers by this authorShinsuke Fujiwara
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for more papers by this authorTadayuki Imanaka
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
Search for more papers by this authorCorresponding Author
Masahiro Takagi
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
*Corresponding author. Tel.: +81 (6) 6879-7442; Fax: +81 (6) 6879-7441, E-mail address: [email protected]Search for more papers by this authorKeisuke Nagahisa
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for more papers by this authorSatoshi Ezaki
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
Search for more papers by this authorShinsuke Fujiwara
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Search for more papers by this authorTadayuki Imanaka
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
Search for more papers by this authorCorresponding Author
Masahiro Takagi
Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
*Corresponding author. Tel.: +81 (6) 6879-7442; Fax: +81 (6) 6879-7441, E-mail address: [email protected]Search for more papers by this authorAbstract
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.
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