南方红豆杉bHLH基因克隆与序列分析

被引:10
作者
周华 [1 ]
朱祺 [1 ]
杨艳芳 [2 ]
刘洪伟 [2 ]
余发新 [1 ]
邱德有 [2 ]
机构
[1] 江西省观赏植物遗传改良重点实验室,江西省科学院生物资源研究所
[2] 林木遗传育种国家重点实验室,中国林业科学研究院林业研究所,林木遗传育种国家重点实验室
关键词
红豆杉属; b HLH; 基因克隆; 序列分析; 紫杉醇;
D O I
暂无
中图分类号
Q943.2 [植物基因工程]; S791.49 [红豆杉、紫杉];
学科分类号
摘要
以南方红豆杉为试材,利用RT-PCR方法从南方红豆杉c DNA中克隆了一个b HLH转录因子——Tc MYC,Gen Bank注册号为KC878013。通过生物信息学分析,发现该基因全长1 959 bp,编码一个650个氨基酸残基的亲水蛋白;Tc MYC相对分子量为71.4 k D,等电点p I为4.87。推测所克隆Tc MYC基因编码的蛋白定位于细胞核中,含有一个螺旋—环—螺旋结构,与东北红豆杉、葡萄和烟草的MYC基因编码的蛋白序列一致性分别为98%、45%和44%,进化树分析表明同科属植物的MYC转录因子归为一类,红豆杉的MYC与其他草本被子植物的MYC转录因子亲缘关系都较远。在茉莉酸甲酯诱导的红豆杉细胞中,Tc MYC基因表达呈现略微下降趋势,推测Tc MYC可能负向调控紫杉醇生物合成,为利用分子手段调控紫杉醇的生物合成提供了理论基础。
引用
收藏
页码:52 / 59
页数:8
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