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茶叶科学 ›› 2008, Vol. 28 ›› Issue (3): 157-165.doi: 10.13305/j.cnki.jts.2008.03.003

• •    下一篇

茶叶多酚氧化酶的序列分析与结构预测

潘宇1,2, 王坤波1,2, 徐仲溪1,2,*, 徐辉3, 何志丹1,2   

  1. 1. 湖南农业大学茶学教育部重点实验室;
    2. 湖南农业大学园艺园林学院;
    3. 湖南农业大学生物科学技术学院,湖南 长沙 410128
  • 收稿日期:2007-11-26 修回日期:2008-03-06 出版日期:2008-06-15 发布日期:2019-09-16
  • 通讯作者: *googletea@163.com
  • 作者简介:潘宇(1983— ),男,湖南衡阳人,硕士研究生,主要从事茶叶生物化学研究。
  • 基金资助:
    湖南科技厅[湘科计字(2007)109]

A Sequence Analysis and Structural Prediction on Polyphenol Oxidase in Tea

PAN Yu1,2, WANG Kun-bo1,2, XU Zhong-xi1,2,*, XU Hui3, HE Zhi-dan1,2   

  1. 1. The Key Laboratory of Tea Science of National Ministry of Education, Hunan Agricultural University
    2. Horticulture and Landscape College, Hunan Agricultural University
    3. Biological Sciences & Technology College, Hunan Agricultural University, Changsha 410128, China
  • Received:2007-11-26 Revised:2008-03-06 Online:2008-06-15 Published:2019-09-16

摘要: 调用生物信息学方法对已在国际互联网上的生物数据库(DDBJ、Uni-Prot)注册的茶树多酚氧化酶基因的核酸及氨基酸序列进行分析,并对其组成成分、信号肽、跨膜拓扑结构域、疏水性/亲水性、蛋白质二级及三级结构进行预测与推断。结果表明:茶多酚氧化酶不具有信号肽,存在卷曲螺旋,为位于细胞质中的无跨膜的亲水性不稳定蛋白,无规则卷曲是其蛋白质结构的主要结构元件,α-螺旋与β-折叠分散于整个多肽链中,并存在2个结构功能域。

关键词: 茶树, 多酚氧化酶, 序列分析, 结构预测

Abstract: In the present study, Polyphenol Oxidase (PPO) in tea plant which was registered in biodatabase (DDBJ & Uni-Prot) were analyzed and predicted by method of bioinformatics, including composition of nuclei acid sequences and amino acid sequences, signal peptide, transmembrane topological structure, hydrophobicity or hydrophilicity, secondary and tertiary structure of protein. The results showed that PPO in tea was a hydrophilic and non-transmembrane protein without signal peptide, but had coils. The main motifs of its predicted secondary structure of had random coil, alpha helix and beta turn were spread to the whole secondary structure of protein. Its amino acid sequences included two functional domains.

Key words: tea plant, polyphenol oxidase, sequence analysis, structural prediction

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