PROBLEM TO BE SOLVED: To provide a gene having a novel function which can increase or decrease protein content in an angiosperm seed and to provide a method for using the same.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 any one amino acid sequence of amino acid sequences consisting of a specific sequence. In the method, the chimeric protein is a protein with a transcriptional repressor. In the method, particularly as a subject, Arabidopsis thaliana of Brassicaceae is expressed and analyzed.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及びその利用方法の提供。【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、若しくは特定な配列からなるアミノ酸配列のうちいずれか1つ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で、種子におけるタンパク質含量を有意に減少させる方法。前記のキメラタンパク質が転写抑制因子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、解析する方法。【選択図】なし
