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茶叶科学 ›› 2013, Vol. 33 ›› Issue (3): 221-228.doi: 10.13305/j.cnki.jts.2013.03.008

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茶树花青素还原酶的酶学特性研究

杨琴1, 赵磊2, 刘亚军1, 刘莉2, 王云生1, 高丽萍1,*, 夏涛2,*   

  1. 1. 安徽农业大学生命科学学院,安徽 合肥 230036;
    2. 安徽农业大学 教育部茶叶生物化学与生物技术重点实验室,安徽 合肥 230036
  • 收稿日期:2012-12-28 修回日期:2013-02-18 出版日期:2013-06-30 发布日期:2019-09-04
  • 通讯作者: *。
  • 作者简介:杨琴(1987— ),女,江苏南京人,硕士,主要从事茶树次生代谢及生物化学研究。
  • 基金资助:
    国家自然科学基金(30972401、31170647、1170282、31000314)、安徽省自然科学基金(11040606M73)、安徽省高校自然科学基金(KJ2012A110)

Research on Enzymatic Characteristics of Anthocyanin Reductase of Tea Plant [Camellia sinensis (L.) O. Kuntze]

YANG Qin1, ZHAO Lei2, LIU Ya-jun1, LIU Li2, WANG Yun-sheng1, GAO Li-ping1,*, XIA Tao2,*   

  1. 1. School of Biology Science, Anhui Agricultural University, Hefei 230036, China;
    2. Key Lab of Tea Biochemistry and Biotechnology, Ministry of Education, Anhui Agricultural University, Hefei 230036, China
  • Received:2012-12-28 Revised:2013-02-18 Online:2013-06-30 Published:2019-09-04

摘要: 茶树花青素还原酶(CsANR)作为原花青素生物合成途径中的关键酶,催化花青素为相应的2,3-顺式-黄烷-3-醇。为了研究该酶的酶学特性,本文采用原核表达及钴离子亲和柱纯化技术,表达并纯化出目的蛋白;重点对CsANR1酶学特性进行研究分析。结果表明,CsANR1的最适反应温度为40℃,最适pH值为6.5;对底物矢车菊色素的亲和力高于飞燕草色素。Cu2+、Co2+、Fe2+、Mn2+、Zn2+和Hg2+等金属离子对酶有抑制作用,存放15βd后酶活下降50%。

关键词: 茶树, 花青素还原酶, 原核表达, 酶学特性

Abstract: Anthocyanidin reductase (ANR) is a key enzyme in the biosynthetic pathway of proanthocyanidins(PAs), which catalyzes anthocyanidins into the corresponding 2, 3-cis-flavan-3-ols. For researching enzymatic characteristics of the enzyme, this study was carried out to express and purify the protein by prokaryotic expression and Cobalt ion affinity column purification. The optimal conditions of CsANR1 were observed at 40℃ and pH 6.5. The more substrate preference of CsANR1 was showed on cyanidin over delphinidin. Moreover, Cu2+, Co2+, Fe2+, Mn2+, Zn2+ and Hg2+inhibited the enzyme activity and the enzyme activity decreased 50% after storing 15 days.

Key words: tea plant[Camellia sinensis (L.) O. Kuntze], anthocyanin reductase, prokaryotic expression, enzymatic characteristics

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