Bridgestone Corporation

Hitachi Zosen Corporation

Badan Pengkajian Dan Penerapan Teknologi

Koichiro Gyokusen

Akio Kobayashi

Eiichiro Fukusaki

Tomoki Sando

Norie Watanabe

Kazumasa Hirata

Yoshihisa Nakazawa

Takeshi Bamba

Eiichiro Fukuzaki

Yoko Harada

Hirotaka Uefuji

Ren Chen

Haska Nadirman

Purbowasito Wahyu

A method for increasing the amount of trans-1,4-polyisoprene contained in a plant, and a method for effectively producing trans-1,4-polyisoprene using a plant are provided. A long-chain trans-prenyl diphosphate synthase gene that comprises DNA having at least one base sequence selected from the group consisting of a base sequence from positions 88 to 1134 of the base sequence of SEQ ID NO: 1 or a complementary sequence thereof, a base sequence from positions 42 to 1088 of the base sequence of SEQ ID NO: 3 or a complementary sequence thereof, and a base sequence from positions 91 to 1140 of the base sequence of SEQ ID NO: 5 or a complementary sequence thereof are disclosed; as well as a plant transformed with an expression vector containing the gene.

Long-chain trans-prenyl diphosphate synthase gene

It is a subject of this invention to isolate a gene group of enzymes involved in the biosynthesis of vitamin E of Para rubber tree, and to determine the base sequence of each gene. According to this invention, genes encoding enzymes involved in the vitamin E biosynthesis were isolated from Para rubber tree and the base sequences of these genes were determined. Since vitamin E is an antioxidant existing in nature, it is expected that transformation of a plant by using the genes obtained in the invention would result in an increase in the vitamin E content of the plant and, in its turn, contribute to the prevention of rubber from aging.

Homogentisic acid geranylgeranyl transerase polypeptide

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Fukuoka, Japan

Koichiro Gyokusen