PROBLEM TO BE SOLVED: To provide a gene having a novel function which can increase or decrease protein content in an angiosperm seed.SOLUTION: A method significantly decreases protein content in a seed by expressing, in a plant body, a chimeric protein in which a transcription factor consisting of a protein which comprises a specific amino acid sequence is fused with a functional peptide which converts any transcription factor into a transcriptional repressor or a transcription factor consisting of a protein which comprises specific amino acid sequence. In the method, the chimeric protein is a protein with a transcriptional repressor activity. Particularly as a subject, Arabidopsis thaliana of Brassicaceae is expressed and used for analysis.COPYRIGHT: (C)2014,JPO&INPIT【課題】被子植物の種子におけるタンパク質含量を増加或いは減少できる新規な機能を有する遺伝子の提供。【解決手段】特定のアミノ酸配列を含むタンパク質からなる転写因子と、任意の転写因子を転写抑制因子に転換する機能性ペプチドとを融合させたキメラタンパク質、若しくは特定のアミノ酸配列を含むタンパク質からなる転写因子を植物体において発現させることにより、種子におけるタンパク質含量を有意に減少させる方法。前記キメラタンパク質が転写抑制因子活性を持つタンパク質である方法。特にアブラナ科のシロイヌナズナを対象として発現させ、解析に用いる。【選択図】なし
