作物学报 ›› 2015, Vol. 41 ›› Issue (11): 1632-1639.doi: 10.3724/SP.J.1006.2015.01632
曹征1,**,李曼菲1,**,孙伟1,张丹1,张祖新1,2,*
CAO Zheng1,**,LI Man-Fei1,**,SUN Wei1,ZHANG Dan1,ZHANG Zu-Xin1,2,*
摘要:
BEL1-like (BELL)家族蛋白是植物中普遍存在的一类具有同源异型结构域的转录因子。拟南芥中BELL家族蛋白能与KNOTTED1-like蛋白互作形成异源二聚体,并结合到特异顺式作用元件来调控基因的表达,从而影响植物生长发育进程。本文采用隐马可夫(HMM)模型,在玉米基因组中鉴定到15个BELL家族基因(ZmBELL),分布于7条玉米染色体。通过与拟南芥BELL基因的序列比较将这些基因分为两大类。在玉米8种组织中ZmBELL有不同的表达模式,具有明显的组织表达特异性。基于基因共表达分析及BELL-like蛋白特异结合的顺式元件分析,预测到86个可能受ZmBELL调控的下游靶标基因。这86个基因和12个ZmBELL表达模式相同,并且在基因启动子区存在与BEL1-like蛋白结合的顺式元件。这些结果为进一步解析玉米BELL家族基因的功能和作用机理积累了有价值的资料。
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