河南农业科学 ›› 2023, Vol. 52 ›› Issue (10): 100-108.DOI: 10.15933/j.cnki.1004-3268.2023.10.011

• 园艺 • 上一篇    下一篇

百香果苯丙氨酸解氨酶基因PePAL克隆及表达分析

杨翠凤,滕峥,韦春,刘正鲁   

  1. (百色学院农业与食品工程学院/广西芒果生物学重点实验室/亚热带特色农业产业学院,广西 百色 533000)
  • 收稿日期:2023-05-16 出版日期:2023-10-15 发布日期:2023-11-08
  • 通讯作者: 刘正鲁(1980-),男,山东菏泽人,副教授,博士,主要从事园艺植物栽培与育种研究。E-mail:zhengluliu@hotmail.com
  • 作者简介:杨翠凤(1988-),女,广西桂林人,高级实验师,博士,主要从事亚热带果树栽培研究。E-mail:1678383409@qq.com
  • 基金资助:
    广西自然科学基金项目(2021JJB130444,2022JJB130088);广西科技基地和人才专项(2020AC20047);百色市科技支撑计
    划项目(百科20203203)

Cloning and Expression Analysis of Phenylalanine Ammonia‑lyase Gene PePAL in Passion Fruit

YANG Cuifeng,TENG Zheng,WEI Chun,LIU Zhenglu   

  1. (Agriculture and Food Engineering College/Guangxi Key Laboratory of Biology for Mango/Industrial College of Subtropical Characteristic Agriculture,Baise Collge,Baise 533000,China)
  • Received:2023-05-16 Published:2023-10-15 Online:2023-11-08

摘要: 为探讨百香果中苯丙氨酸解氨酶(PAL)编码基因的序列结构和蛋白质功能,以台农1号百香果(Passiflora edulis Sims)为材料,以cDNA为模板对PePAL基因进行同源克隆,同时对PePAL 编码蛋白质的结构及功能进行预测。结果表明,PePAL基因cDNA 全长2 499 bp,含有1 个完整开放阅读框(2 124 bp),编码707个氨基酸,蛋白质分子质量为173.43 ku。利用ProtParam、SignalP 4.1 软件及TMHMM等软件对PePAL蛋白的结构预测显示,该蛋白质是一个亲水性的非分泌型蛋白,无跨膜结构域,无信号肽。PePAL主要定位于细胞核、叶绿体、细胞质、细胞膜、线粒体、液泡等部位,其二级结构由α 螺旋、延伸链、β 转角及无规则卷曲组成。PePAL在不同品种百香果的同一结果枝上的表达模式均呈现花中表达量最高,其次是茎,在成熟叶中表达量最低。

关键词: 百香果, 苯丙氨酸解氨酶, 基因克隆, 表达分析

Abstract: Phenylalanine ammonia‑lyase(PAL)is involved in the formation of secondary metabolism of lignin,flavonoids and coumarines,and plays an important role in plant disease resistance,insect resistance,stress resistance and growth and development.In order to explore the gene sequence structure and protein function of PAL in Passiflora edulis Sims,the“Tainong 1”Passiflora edulis Sims was used as the material and the cDNA was used as the template for homologous cloning of the PePAL gene.At the same time,the structure and function of the PePAL coding protein were predicted. The results showed that the cDNA of PePAL gene was 2 499 bp in length,containing a complete open reading frame(ORF)of 2 124 bp,encoding 707 amino acids,with a molecular weight of 173.43 ku.The structural prediction of PePAL protein using ProtParam,SignalP4.1 and TMHMM softwares showed that the protein was a hydrophilic non‑secretory protein without transmembrane domain and signal peptide. PePAL was mainly located in the nucleus,chloroplast,cytoplasm,cell membrane,mitochondria,vacuoles and other parts,and its secondary structure was composed of α‑helix,extended strand,β‑turn and random coil.The expression of PePAL was the highest in flowers on the same fruiting branch of passion fruit,followed by stems,and the lowest in mature leaves.

Key words: Passiflora edulis Sims, PAL, Gene cloning, Expression analysis

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