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[摘要]
目的 基于前期对灰毡毛忍冬Lonicera macranthoides转录组测序结果,从灰毡毛忍冬RNA中克隆灰毡毛忍冬MADS-box基因家族蕾期延长相关基因AGL15,并对其进行生物信息学及表达分析。方法 对灰毡毛忍冬总RNA进行反转录酶链式反应(reverse transcription-PCR,RT-PCR)和cDNA末端快速扩增反应(rapid amplification of cDNA ends,RACE),获得完整的开放阅读框(ORF)。运用生物信息学的方法对该序列进行同源性分析和相似性比较,预测编码蛋白,并对其进行各种理化性质分析。运用半定量PCR测得该基因在灰毡毛忍冬不同部位的表达情况。结果 获得AGL15基因,ORF长795 bp,编码264个氨基酸,与葡萄Vitis vinifera中MADS-box基因家族AGL15基因相似性最高,且包含MADS和K-box的保守序列。AGL15蛋白无跨膜区域,定位于细胞质中,在灰毡毛忍冬各部位均有表达。结论 首次从灰毡毛忍冬中克隆得到可能控制蕾期延长的基因,分析了其在灰毡毛忍冬不同部位表达差异性,为灰毡毛忍冬蕾期延长研究提供参考。
[Key word]
[Abstract]
Objective To clone the MADS-box gene denoted AGL15 from total RNA of Lonicera macranthoides based on previous transcriptome sequencing data and analyze the bioinformatics and expression of the gene. Methods The gene containing intact open reading frame (ORF) was cloned by reverse transcription-PCR (RT-PCR) and rapid amplification of cDNA ends (RACE). The similarity comparison and homology analysis on the sequence were carried out using bioinformatic method, the coding protein was predicted and the physicochemical properties were analyzed. The expression of the gene in different locations of L. macranthoides was determined by semiquantitative PCR using gene-specific primers. Results The Lm-AGL15 gene, containing a 795 bp ORF that encoded 264 amino acids, was cloned. The deduced protein sequence had the most similarity to the AGL15 in Vitis vinifera and exhibited two conserved motifs (MADS and K-BOX). Without transmembrane domain, Lm-AGL15 was located in cytoplasm and expressed only in each part. Conclusion For the first time from L. macranthoides cloning could prolong the period of bud of gene, analysis of the gene expression in different parts of L. macranthoides which would provide a reference for the study of prolonging L. macranthoides bud stage.
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[基金项目]
国家自然科学基金资助项目(81203007);湖南省自然科学基金资助(13JJ9010);湖南省教育厅科技创新平台(14K071);湖南省研究生科研创新项目(CX2014B368);湖南省"中药学"重点学科建设项目资助(湘教通[2011]76号:zy201403,zy201505)