T
Takeshi Sassa
Researcher at Yamagata University
Publications - 136
Citations - 3516
Takeshi Sassa is an academic researcher from Yamagata University. The author has contributed to research in topics: Diterpene & Monilinia fructicola. The author has an hindex of 31, co-authored 136 publications receiving 3243 citations. Previous affiliations of Takeshi Sassa include Toyama Prefectural University & Kyushu University.
Papers
More filters
Journal ArticleDOI
Identification of a Biosynthetic Gene Cluster in Rice for Momilactones
Kazuhiro Shimura,Atsushi Okada,Kazunori Okada,Yusuke Jikumaru,Kwang-Wook Ko,Tomonobu Toyomasu,Takeshi Sassa,Morifumi Hasegawa,Osamu Kodama,Naoto Shibuya,Jinichiro Koga,Hideaki Nojiri,Hisakazu Yamane +12 more
TL;DR: Functional analysis by heterologous expression in Escherichia coli followed by enzyme assays demonstrated that the AK103462 protein catalyzes the conversion of 3β-hydroxy-9βH-pimara-7,15-dien-19,6β-olide into momilactone A, providing strong evidence for the presence on chromosome 4 of a gene cluster involved in momILactone biosynthesis.
Journal ArticleDOI
Fusicoccins are biosynthesized by an unusual chimera diterpene synthase in fungi
Tomonobu Toyomasu,Mai Tsukahara,Akane Kaneko,Rie Niida,Wataru Mitsuhashi,Tohru Dairi,Nobuo Kato,Takeshi Sassa +7 more
TL;DR: It is found that (+)-fusicocca-2,10 (14)-diene, a tricyclic hydrocarbon precursor for fusicoccins, is biosynthesized from the C5 isoprene units by an unusual multifunctional enzyme, P. amygdali fusICoccadiene synthase (PaFS), which shows both prenyltransferase and terpene cyclase activities.
Journal ArticleDOI
Biological functions of ent- and syn-copalyl diphosphate synthases in rice: key enzymes for the branch point of gibberellin and phytoalexin biosynthesis.
Kazuko Otomo,Hiromichi Kenmoku,Hideaki Oikawa,Wilfried A. König,Hiroaki Toshima,Wataru Mitsuhashi,Hisakazu Yamane,Takeshi Sassa,Tomonobu Toyomasu +8 more
TL;DR: The results strongly suggest the presence of two ent-CDP synthase isoforms in rice, one that participates in the biosynthesis of GAs and a second that is involved in the BIOSynthesis of phytoalexins.
Journal ArticleDOI
Ent-kaurene synthase from the fungus Phaeosphaeria sp. L487. cDNA isolation, characterization, and bacterial expression of a bifunctional diterpene cyclase in fungal gibberellin biosynthesis.
TL;DR: Results indicate that the fungus has a bifunctional diterpene cyclase that can convert geranylgeranyl diphosphate into ent-kaurene and may be separate catalytic sites for the two cyclization reactions.
Journal ArticleDOI
Diterpene Cyclases Responsible for the Biosynthesis of Phytoalexins, Momilactones A, B, and Oryzalexins A–F in Rice
Kazuko Otomo,Yuri Kanno,Akihiro Motegi,Hiromichi Kenmoku,Hisakazu Yamane,Wataru Mitsuhashi,Hideaki Oikawa,Hiroaki Toshima,Hironori Itoh,Makoto Matsuoka,Takeshi Sassa,Tomonobu Toyomasu +11 more
TL;DR: In this article, the authors identified genes encoding the type-A diterpene cyclases 9beta-pimara-7,15-diene synthase and ent-sandaracopimaradiene synthases which are involved in the biosynthesis of momilactones A, B and oryzalexins A-F respectively.