摘要:
Disclosed are the following DNA strands relating to the synthesis of keto group-containing xanthophylls such as astaxanthin and the like, and the techniques relating to the production of xanthophylls by genetic engineering: A DNA strand having a nucleotide sequence which encodes a polypeptide having an enzyme activity for converting a methylene group at the 4-position of .beta.-ionone ring into a keto group. A DNA strand having a nucleotide sequence which encodes a polypeptide having an enzyme activity for converting a methylene group at the 4-position of a 3-hydroxy-.beta.-ionone ring into a keto group. A DNA strand having a nucleotide sequence which encodes a polypeptide having an enzyme activity for adding a hydroxyl group to the 3-carbon of a 4-keto-.beta.-ionone ring. It is possible to produce a variety of xanthophylls such as canthaxanthin, astaxanthin and the like by introducing the DNA strands into an appropriate microorganism such as Escherichia coli and the like.
摘要:
To provide a microorganism or a plant transformed with a β-ionone ring-4-ketolase gene and/or β-ionone ring-3-hydroxylase gene derived from Brevundimonas sp. strain SD-212. The β-ionone ring-4-ketolase gene and β-ionone ring-3-hydroxylase gene produced by Brevundimonas sp. strain SD-212 each have a high activity compared with those of known enzymes, and therefore microorganisms transformed with the genes encoding these enzymes can efficiently produce astaxanthin.
摘要:
The present invention provides a Brevundimonas sp. strain SD212-derived peptide having β-ionone ring-2-hydroxylase activity and a gene encoding the same, to thereby make it possible to produce rare carotenoids in which a hydroxyl group is introduced at the position 2(2′) carbon in their β-ionone ring in large quantities.The present invention also provides a novel gene encoding an enzyme which introduces a hydroxyl group at the position 3(3′) carbon in the β-ionone ring of carotenoids, and a novel gene encoding a geranylgeranyl pyrophosphate synthase.
摘要:
The production of carotenoid is accomplished using a DNA molecule that encodes a polypeptide as obtained from Haematococcus pluvialis, Phaffia rhodozyma, or Saccharomyces cerevisiae, having isopentonyl pyrophosphate (IPP) isomerase activity, or DNA molecule having a nucleotide sequence that hybridizes thereto. In particular, one can introduce such a DNA molecule into a carotenoid-producing microorganism, culture the microorganism thus transformed, and then obtain carotenoids in the culture broth and cells.
摘要:
An reproducible transformation system of a yeast of Candida utilis, a process for expressing a heterologous gene in the transformation system, a vector which can be used in the transformation system and the expression method, and a novel DNA group are disclosed. In particular, the process for expressing a heterologous gene in Candida utilis comprises transforming Candida utilis with a vector comprising a drug-resistance marker, a sequence homologous to the chromosomal DNA of the Candida utilis yeast, and the heterologous gene, culturing the transformant, and isolating the expression product of the heterologous gene.
摘要:
Disclosed are DNA sequences which are useful for the synthesis of carotenoids such as lycopene, .beta.-carotene, zeaxanthin or zeaxanthin-diglucoside, that is, DNA sequences encoding carotenoid biosynthesis enzymes. These DNA sequences are the sequences 1- 6, respectively, shown in the specification.Also disclosed is a process for producing a carotenoid compound which is selected from the group consisting of prephytoene pyrophosphate, phytoene, lycopene, .beta.-carotene, zeaxanthin and zeaxanthin-diglucoside, which comprises transforming a host with at least one of the DNA sequences 1- 6 described above and culturing the transformant.
摘要翻译:公开了可用于合成类胡萝卜素如番茄红素,β-胡萝卜素,玉米黄质或玉米黄质 - 二葡萄糖苷的DNA序列,即编码类胡萝卜素生物合成酶的DNA序列。 这些DNA序列分别是说明书中所示的序列+ E,crc 1 + EE - + E,crc 6 + EE。 还公开了一种制备类胡萝卜素化合物的方法,该类胡萝卜素化合物选自焦罂粟素,番茄红素,β-胡萝卜素,玉米黄质和玉米黄质 - 二葡萄糖苷,其包括用至少一个DNA序列+ E ,crc 1 + EE - + E,crc 6 + EE,并培养转化体。