The Dof （DNA binding with One Finger） family encoding single zinc finger proteins has been known as a family of plant-specific transcription factors. These transcription factors are involved in a variety of function...The Dof （DNA binding with One Finger） family encoding single zinc finger proteins has been known as a family of plant-specific transcription factors. These transcription factors are involved in a variety of functions of importance for different biological processes in plants. In the current study, we identified 34 Dof family genes in tomato （Solanum lycopersicum L.）, distributed on 11 chromosomes. A complete overview of SlDof genes in tomato is presented, including the gene structures, chromosome locations, phylogeny, protein motifs and evolution pattern. Phylogenetic analysis of 34 SlDof proteins resulted in four classes constituting six clusters. In addition, a comparative analysis between these genes in tomato, Arabidopsis （Arabidopsis thaliana L.） and rice （Oryza sativa L.） was also performed. The tomato Dof family expansion has been dated to recent duplication events, and segmental duplication is predominant for the SlDof genes. Furthermore, the SlDof genes displayed differential expression either in their transcript abundance or in their expression patterns under normal growth conditions. This is the first step towards genome-wide analyses of the Dof genes in tomato. Our study provides a very useful reference for cloning and functional analysis of the members of this gene family in tomato and other species.展开更多
【目的】最近在植物中发现了一类Ca2+传感蛋白——类钙调磷酸酶B亚基蛋白CBL(calcineurin B-likeproteins),CBL及其靶蛋白CIPK(CBL-interacting protein kinase)构成CBL/CIPK信号网络系统,在植物干旱、盐渍、低温等逆境胁迫应答中起重...【目的】最近在植物中发现了一类Ca2+传感蛋白——类钙调磷酸酶B亚基蛋白CBL(calcineurin B-likeproteins),CBL及其靶蛋白CIPK(CBL-interacting protein kinase)构成CBL/CIPK信号网络系统,在植物干旱、盐渍、低温等逆境胁迫应答中起重要作用。鉴定梨基因组中CBL家族基因成员,对其基因进化、结构与表达特征进行分析,为植物CBL基因功能分析与利用提供依据。【方法】通过生物信息学手段,结合梨基因组注释信息,鉴定梨CBL家族成员序列信息;利用MEGA6.0程序进行多序列比对、分类并构建系统进化树;利用per1程序、GSDS工具以及ClustalX软件进行基因结构与保守性分析;通过qRT-PCR技术进行多种非生物胁迫处理下PbCBLs表达分析。【结果】成功鉴定出7个CBL家族成员,基因结构预测表明PbCBL9含5个内含子,其余PbCBLs均含有7—8个内含子;预测的PbCBLs均含4个EF-hand功能域,且相邻EF-hand功能域之间氨基酸数目非常保守;通过系统发育树分析,将7个PbCBLs分为2类;qRT-PCR技术进行不同胁迫处理下杜梨叶片PbCBLs的表达分析,结果表明,在NaCl胁迫下,PbCBL1表达量6h降至最低,24h则明显升高;与之相反,PbCBL2和PbCBL3的表达量在6h达最高,24h最低;PbCBL4和PbCBL8表达量在3h明显增加,随后表达量下降;PbCBL9表现明显的上调趋势,24h达到最大;PbCBL10则在6h表达量最高。10%(w/v)PEG6000胁迫处理下,PbCBL2、PbCBL4和PbCBL8表达量上调,PbCBL1表达量下调;PbCBL3、PbCBL9和PbCBL10表达量均在6h最低,12h和24h较6h明显升高,PbCBL3和PbCBL10于24h表达量达到最高,而PbCBL9在12h表达量最高。4℃低温处理下,PbCBL2、PbCBL4、PbCBL8表达量上调;而PbCBL1和PbCBL3表达量下调;PbCBL9和PbCBL10表达量表现上下波动的变化趋势,均在3h有明显增加,随后显著降低。42℃高温胁迫处理下,PbCBL1、PbCBL3和PbCBL4表达量下调;PbCBL2表达量整体上调,6h达到最高;PbCBL8、PbCBL9和PbCBL10总体呈现相同的变化趋展开更多
基金supported by the State Major Basic Research Development Program (2011CB100600)the National Natural Science Foundation of China (31171974 and 30800755)
文摘The Dof （DNA binding with One Finger） family encoding single zinc finger proteins has been known as a family of plant-specific transcription factors. These transcription factors are involved in a variety of functions of importance for different biological processes in plants. In the current study, we identified 34 Dof family genes in tomato （Solanum lycopersicum L.）, distributed on 11 chromosomes. A complete overview of SlDof genes in tomato is presented, including the gene structures, chromosome locations, phylogeny, protein motifs and evolution pattern. Phylogenetic analysis of 34 SlDof proteins resulted in four classes constituting six clusters. In addition, a comparative analysis between these genes in tomato, Arabidopsis （Arabidopsis thaliana L.） and rice （Oryza sativa L.） was also performed. The tomato Dof family expansion has been dated to recent duplication events, and segmental duplication is predominant for the SlDof genes. Furthermore, the SlDof genes displayed differential expression either in their transcript abundance or in their expression patterns under normal growth conditions. This is the first step towards genome-wide analyses of the Dof genes in tomato. Our study provides a very useful reference for cloning and functional analysis of the members of this gene family in tomato and other species.
文摘【目的】最近在植物中发现了一类Ca2+传感蛋白——类钙调磷酸酶B亚基蛋白CBL(calcineurin B-likeproteins),CBL及其靶蛋白CIPK(CBL-interacting protein kinase)构成CBL/CIPK信号网络系统,在植物干旱、盐渍、低温等逆境胁迫应答中起重要作用。鉴定梨基因组中CBL家族基因成员,对其基因进化、结构与表达特征进行分析,为植物CBL基因功能分析与利用提供依据。【方法】通过生物信息学手段,结合梨基因组注释信息,鉴定梨CBL家族成员序列信息;利用MEGA6.0程序进行多序列比对、分类并构建系统进化树;利用per1程序、GSDS工具以及ClustalX软件进行基因结构与保守性分析;通过qRT-PCR技术进行多种非生物胁迫处理下PbCBLs表达分析。【结果】成功鉴定出7个CBL家族成员,基因结构预测表明PbCBL9含5个内含子,其余PbCBLs均含有7—8个内含子;预测的PbCBLs均含4个EF-hand功能域,且相邻EF-hand功能域之间氨基酸数目非常保守;通过系统发育树分析,将7个PbCBLs分为2类;qRT-PCR技术进行不同胁迫处理下杜梨叶片PbCBLs的表达分析,结果表明,在NaCl胁迫下,PbCBL1表达量6h降至最低,24h则明显升高;与之相反,PbCBL2和PbCBL3的表达量在6h达最高,24h最低;PbCBL4和PbCBL8表达量在3h明显增加,随后表达量下降;PbCBL9表现明显的上调趋势,24h达到最大;PbCBL10则在6h表达量最高。10%(w/v)PEG6000胁迫处理下,PbCBL2、PbCBL4和PbCBL8表达量上调,PbCBL1表达量下调;PbCBL3、PbCBL9和PbCBL10表达量均在6h最低,12h和24h较6h明显升高,PbCBL3和PbCBL10于24h表达量达到最高,而PbCBL9在12h表达量最高。4℃低温处理下,PbCBL2、PbCBL4、PbCBL8表达量上调;而PbCBL1和PbCBL3表达量下调;PbCBL9和PbCBL10表达量表现上下波动的变化趋势,均在3h有明显增加,随后显著降低。42℃高温胁迫处理下,PbCBL1、PbCBL3和PbCBL4表达量下调;PbCBL2表达量整体上调,6h达到最高;PbCBL8、PbCBL9和PbCBL10总体呈现相同的变化趋
