高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (4): 624.

• 研究论文 • 上一篇    下一篇

Δ6去饱和酶催化合成γ-亚麻酸

咸漠1, 康亦兼2, 闫吉昌3, 刘延1, 李文兴1, 毕颖丽1, 甄开吉1   

  1. 1. 吉林大学化学学院, 长春 130023;
    2. 青岛化工学院化工系, 青岛 266042;
    3. 东北师范大学化学学院, 长春 130021
  • 收稿日期:2001-03-26 出版日期:2002-04-24 发布日期:2002-04-24
  • 通讯作者: 咸漠(1967年出生),男,博士,副教授,从事生物催化研究.E-mail:byl@mail.jlu.edu.cn E-mail:byl@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29873018)资助.

△6 Desaturase Catalyzing Linoleic Acid to γ-Linolenic Acid

XIAN Mo1, KANG Yi-Jian2, YAN Ji-Chang3, LIU Yan1, LI Wen-Xing1, BI Ying-Li1, ZHEN Kai-Ji1   

  1. 1. College of Chemistry. Jilin University, Changchun 130023, China;
    2. Department of Chemical Engineering, Qingdao Institute of Chemical Engineering, Qingdao 266042, China;
    3. Department of Chemistry, Northeast Normal University, Changchun 130024, China
  • Received:2001-03-26 Online:2002-04-24 Published:2002-04-24

摘要: 报道了含△6去饱和酶的深黄被孢霉菌丝提取物催化亚油酸合成γ-亚麻酸。研究了辅酶、温度、时间等对γ-亚麻酸合成的影响。结果表明,反应温度降低,γ-亚麻酸的产率提高。在10℃以下。γ-亚麻酸的产率达到最大值;苹果酸盐对该反应有明显促进作用。γ-亚麻酸的产率随体系pH增加而增加,且在pH=7~8时产率较高;该反应需在分子氧存在下进行;NADPH,ATP和CoA是该反应的必需辅酶。在优化的反应条件下,γ-亚麻酸的产量达到0.21mg/mL.

关键词: △6去饱和酶, &gamma, -亚麻酸, 生物合成, 深黄被孢霉

Abstract: The biosynthesis of γ-linolenic acid from linoleic acid with △6 desaturase, Morierella isabellina,is reported.Various factors affecting this process were studied.The results show that the yield of the γ-linolenic acid increases with the decrease of the reaction temperature and reachs a maximum when incubat-ed below 10℃.Adding malate to the reaction mixture caused a marked increase of γ-linolenic acid yield;an increased linolenic acid yield could also be obtained with the increase of pHvalue of the reaction mixtureand reached the maximum at pH 7-8.Oxygen was an essential substrate, and NADPH, CoA and ATP were inpartent cofactors for the reaction.The yield of γ-linolenic acid reached 0.21 mg/mLunder the opti-mal reaction conditions.

Key words: △6 Desaturase, γ-Linolenic acid, Biosynthesis, Mortierella isabellina

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