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User:Toki Taira

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Toki Taira is an associate professor at Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus located in Okinawa island, Japan. He received PhD degree in 2001 from Graduate School of Agriculture in Kyushu University. His research program currently focuses on the structures and functions of plant chitinases (GH18 and GH19), including their CBMs (CBM18 and CBM50), which are involved in plant self-defense against fungal pathogens. He contributed enzymatic characterization of various plant chitinases [1, 2, 3, 4] and analysis of their antifungal action by using combination of biochemical experiment and bio-assay [5, 6, 7, 8]. He and his colabolater found a new type chitinase consisting of GH18 and LysM domains (CBM50) from fern plant [2]. They reported LysM domain of the chitinase could bind to a chitin and contribute signi´Čücantly to the antifungal activity of the protein through their binding activity [2, 9]. CBM50 has been established by these reports.


  1. Taira T, Toma N, and Ishihara M. (2005). Purification, characterization, and antifungal activity of chitinases from pineapple (Ananas comosus) leaf. Biosci Biotechnol Biochem. 2005;69(1):189-96. DOI:10.1271/bbb.69.189 | PubMed ID:15665484 [Taira2005a]
  2. Onaga S and Taira T. (2008). A new type of plant chitinase containing LysM domains from a fern (Pteris ryukyuensis): roles of LysM domains in chitin binding and antifungal activity. Glycobiology. 2008;18(5):414-23. DOI:10.1093/glycob/cwn018 | PubMed ID:18310304 [Onaga2008]
  3. Taira T, Hayashi H, Tajiri Y, Onaga S, Uechi G, Iwasaki H, Ohnuma T, and Fukamizo T. (2009). A plant class V chitinase from a cycad (Cycas revoluta): biochemical characterization, cDNA isolation, and posttranslational modification. Glycobiology. 2009;19(12):1452-61. DOI:10.1093/glycob/cwp119 | PubMed ID:19696236 [Taira2009]
  4. Taira T, Mahoe Y, Kawamoto N, Onaga S, Iwasaki H, Ohnuma T, and Fukamizo T. (2011). Cloning and characterization of a small family 19 chitinase from moss (Bryum coronatum). Glycobiology. 2011;21(5):644-54. DOI:10.1093/glycob/cwq212 | PubMed ID:21367878 [Taira2011]
  5. Taira T, Yamagami T, Aso Y, Ishiguro M, and Ishihara M. (2001). Localization, accumulation, and antifungal activity of chitinases in rye (Secale cereale) seed. Biosci Biotechnol Biochem. 2001;65(12):2710-8. DOI:10.1271/bbb.65.2710 | PubMed ID:11826968 [Taira2001]
  6. Taira T, Ohnuma T, Yamagami T, Aso Y, Ishiguro M, and Ishihara M. (2002). Antifungal activity of rye (Secale cereale) seed chitinases: the different binding manner of class I and class II chitinases to the fungal cell walls. Biosci Biotechnol Biochem. 2002;66(5):970-7. DOI:10.1271/bbb.66.970 | PubMed ID:12092848 [Taira2002]
  7. Taira T, Ohdomari A, Nakama N, Shimoji M, and Ishihara M. (2005). Characterization and antifungal activity of gazyumaru (Ficus microcarpa) latex chitinases: both the chitin-binding and the antifungal activities of class I chitinase are reinforced with increasing ionic strength. Biosci Biotechnol Biochem. 2005;69(4):811-8. DOI:10.1271/bbb.69.811 | PubMed ID:15849422 [Taira2005b]
  8. Arakane Y, Taira T, Ohnuma T, and Fukamizo T. (2012). Chitin-related enzymes in agro-biosciences. Curr Drug Targets. 2012;13(4):442-70. DOI:10.2174/138945012799499721 | PubMed ID:22280343 [Arakane2012]
  9. Ohnuma T, Onaga S, Murata K, Taira T, and Katoh E. (2008). LysM domains from Pteris ryukyuensis chitinase-A: a stability study and characterization of the chitin-binding site. J Biol Chem. 2008;283(8):5178-87. DOI:10.1074/jbc.M707156200 | PubMed ID:18083709 [Ohnuma2008]

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