ZHOU Fei.Bioinformatics and Expression Analysis of HaKAR1Gene in Sunflower[J].HEILONGJIANG AGRICULTURAL SCIENCES,2021,(10):19-22.[doi:DOI:10.11942/j.issn1002-2767.2021.10.0019]
向日葵HaKAR1基因的生物信息学和表达分析
- Title:
- Bioinformatics and Expression Analysis of HaKAR1Gene in Sunflower
- Keywords:
- sunflower; oleic acid; HaKAR1; bioinformatics; expression anaylsis
- 文献标志码:
- A
- 摘要:
- KAR编码β-酮脂酰-ACP还原酶,是在脂肪酸合成过程中催化酮脂酰还原反应的酶。为了解向日葵HaKAR1基因的表达特性及功能,对向日葵HaKAR1编码蛋白进行生物信息学分析和基因表达模式分析,预测HaKAR1编码蛋白为碱性蛋白且为亲水性蛋白,蛋白二级结构主要为α螺旋,预测亚细胞定位于叶绿体。系统进化分析发现,HaKAR1与莴苣(Lactuca sativa L.)KAR1进化关系最近,序列相似性高达90%。基因表达模式分析发现,HaKAR1在向日葵种子、舌状花和管状花中表达量较高,其次为茎、叶,在根中不表达。HaKAR1在高、低油酸向日葵种子开花后7~27 d表达均呈先上升后下降再上升的趋势,但在开花后37 d,低油酸材料种子中表达量明显高于高油酸材料,表明HaKAR1在高、低油酸种子发育后期可能存在不同表达调控机制。
- Abstract:
- KAR encodes beta-ketoacyl ACP reductase,which catalyzes ketoacyl reduction in fatty acid synthesis.In order to understand the expression characteristics and function of HaKAR gene in sunflower,the bioinformatics of HaKARprotein and gene expression pattern were analyzed.It was predicted that the protein encoded by HaKAR1 was basic protein and hydrophilic protein.The secondary structure of the protein encoded byHaKAR1 was mainly αhelix,and the subcellular localization was predicted in the chloroplast.Phylogenetic analysis showed that HaKAR1 was closely related to Lactuca sativa L.KAR,and the sequence similarity was as high as 90%.The expression pattern analysis of the gene showed that HaKAR1 was highly expressed in sunflower seeds,ligulate flowers and tubular flowers,followed by stems and leaves,but not in roots.The expression ofHaKAR1 in both high and low oleic acid sunflower seeds increased at first and then decreased,and then increased again at 7-27 days after flowering.However,the expression level of HaKAR1 in sunflower seeds with low oleic acid was significantly higher than that in sunflower seeds with high oleic acid at 37 days after flowering,which indicated that there might be different expression regulation mechanisms of HaKAR1 in high and low oleic acid sunflower seeds at late development stage.
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参考文献:
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备注/Memo
收稿日期:2021-05-07