【摘要】 利用RT-PCR方法从拟南芥中分离了1个CK基因家族成员CK1A,该基因的ORF全长2112bp,编码一条703个氨基酸残基的多肽。构建了CK1A基因的植物表达载体35S:GFP:CK1A,采用基因枪法进行的洋葱表皮细胞GFP瞬时表达实验表明,荧光信号主要分布在细胞核上,显示CK1A基因的产物可能在细胞核上发挥作用。半定量RT-PCR分析表明:CK1A基因在花中表达量最大,其次是茎和根,在叶和叶柄中表达量较弱。蓝光使CK1A基因的表达升高,12h时表达量明显增加,24h时表达量下降。酵母双杂交结果显示CK1A蛋白在蓝光下能与CRY2蛋白发生相互作用,暗示CK1A基因可能参与拟南芥的蓝光信号传导途径。更多还原

【Abstract】 A casein kinase 1 protein gene, CK1A, was isolated from Arabidopsis seedlings by RT-PCR method. This gene contains an open reading frame of 2 112 bp, which encodes 703 amino acids. The plant expression vector of 35S: GFP: CK1A was constructed by the Gateway System. The 35S: GFP: CK1A fusion protein was localized to the nucleus in onion epidermal cell, indicating that the product of CK1A gene plays a role in the cell nucleus. The semi-quantitative RT-PCR analysis showed that CK1A was highly expressed in flowers, stems and roots, but less in leaves and leafstalks. The yeast two-hybrid analysis demonstrated that CK1A and CRY2 can interact in vivo under blue light, which indicates that CK1A may play an important role in blue light signal induction of Arabidopsis.更多还原