小麦Fbox基因TaFBL14的克隆及表达分析
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国家自然科学基金(31301649)


Cloning and Expression Analyses of Fbox Gene TaFBL14 in Wheat
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    摘要:

    该研究利用同源克隆策略,获得了1 条小麦Fbox/LRR重复蛋白14基因(TaFBL14)。TaFBL14基因编码486个氨基酸,预测分子量为53.48 kD,等电点为5.93,序列N端包含一个Fbox结构域,C段包含7个LRR结构域。TaFBL14基因编码蛋白不具有信号肽及核定位信号序列,主要定位在细胞质中,二级结构以α螺旋为主,呈球状。进化树分析表明,TaFBL14与粗山羊草和乌拉尔托小麦的FBL14蛋白亲缘关系较近。qRTPCR分析结果显示,TaFBL14基因主要在小麦叶组织中表达,且受非亲和叶锈菌侵染后呈现上调表达趋势,说明该基因可能参与小麦抵御叶锈菌的侵染过程。

    Abstract:

    Using the homologybased cloning, we obtained a Fbox/LRR repeat protein 14 gene (TaFBL14) from wheat in the present study. TaFBL14 encoded a 486 aa polypeptide with predicted molecular weight of 53.48 kD and theoretical isoelectric point 5.93. The deduced protein included a Fbox domain in the Nterminal and 7 LRR domains in the Cterminal. No signal peptide and nuclear localization sequence were detected. Subcellular localization showed TaFBL14 mainly expressed in the cytoplasm. αhelix was the most important secondary structure, which made TaFBL14 the globular protein. Neighbourjoining tree showed that the deduced TaFBL14 protein shared high similarity with FBL14 from Aegilops tauschii and Triticum urartu. Quantitative reverse transcription PCR showed that TaFBL14 mainly expressed in wheat young leaves and flag leaves, and were upregulated expression from 6 hpi to 96 hpi. These results implied that TaFBL14 may be involved in wheat resistant to leaf rust pathogen infection.

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李铃仙,魏春茹,李虎滢,等.小麦Fbox基因TaFBL14的克隆及表达分析[J].西北植物学报,2017,37(2):232-238

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  • 在线发布日期: 2017-03-23
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