The purpose of the present invention is to provide a novel flavonol 8-hydroxylase. The present invention relates to a flavin enzyme protein having a flavonol 8-hydroxylase activity, and a polynucleotide etc. encoding the same, and so on. The present invention provides: a polynucleotide comprising the nucleotide sequence of SEQ ID NO: 1 or 3; a polynucleotide encoding a protein consisting of the amino acid sequence of SEQ ID No. 2; an expression vector and transformant comprising the polynucleotide; a method for screening a plant which blooms one or more yellow coloured flowers, by using the polynucleotide; a method for producing a plant which blooms one or more yellow coloured flowers by introducing the polynucleotide into host cells; and a method for producing a flavin enzyme protein having a flavonol 8-hydroxylase activity, using the transformant.
本发明的目的是提供一种新型
黄酮醇 8-羟化酶。本发明涉及一种具有
黄酮醇 8-羟化酶活性的黄素酶蛋白,以及编码该蛋白的多核苷酸等。本发明提供:包含
SEQ ID NO: 1 或 3 的核苷酸序列的多核苷酸;编码由
SEQ ID No.2的
氨基酸序列组成的蛋白质的多核苷酸;包含该多核苷酸的表达载体和转化体;利用该多核苷酸筛选开出一朵或多朵黄色花的植物的方法;通过将该多核苷酸导入宿主细胞生产开出一朵或多朵黄色花的植物的方法;以及利用该转化体生产具有
黄酮醇8-羟化酶活性的黄素酶蛋白的方法。