• EI
  • Scopus
  • 食品科学与工程领域高质量科技期刊分级目录第一方阵T1
  • DOAJ
  • EBSCO
  • 北大核心期刊
  • 中国核心学术期刊RCCSE
  • JST China
  • FSTA
  • 中国精品科技期刊
  • 中国农业核心期刊
  • CA
  • WJCI
  • 中国科技核心期刊CSTPCD
  • 中国生物医学SinoMed
中国精品科技期刊2020
陈志琳, 林青君, 王鹏, 叶秀云, 李仁宽. 串珠镰孢菌来源的角质酶基因的克隆表达及其酶学性质[J]. 食品工业科技, 2018, 39(18): 87-92. DOI: 10.13386/j.issn1002-0306.2018.18.017
引用本文: 陈志琳, 林青君, 王鹏, 叶秀云, 李仁宽. 串珠镰孢菌来源的角质酶基因的克隆表达及其酶学性质[J]. 食品工业科技, 2018, 39(18): 87-92. DOI: 10.13386/j.issn1002-0306.2018.18.017
CHEN Zhi-lin, LIN Qing-jun, WANG Peng, YE Xiu-yun, LI Ren-kuan. Expression a Cutinase from Fusarium oxysporum in Pichia pastoris and Characterization[J]. Science and Technology of Food Industry, 2018, 39(18): 87-92. DOI: 10.13386/j.issn1002-0306.2018.18.017
Citation: CHEN Zhi-lin, LIN Qing-jun, WANG Peng, YE Xiu-yun, LI Ren-kuan. Expression a Cutinase from Fusarium oxysporum in Pichia pastoris and Characterization[J]. Science and Technology of Food Industry, 2018, 39(18): 87-92. DOI: 10.13386/j.issn1002-0306.2018.18.017

串珠镰孢菌来源的角质酶基因的克隆表达及其酶学性质

Expression a Cutinase from Fusarium oxysporum in Pichia pastoris and Characterization

  • 摘要: 克隆一个来源于串珠镰孢菌(Fusarium moniliforme Sheld)的角质酶基因,该基因全长693 bp,编码231个成熟的氨基酸。克隆的角质酶基因构建到pPIC9K质粒,获得重组表达载体,转入毕赤酵母(Pichia pastoris Gs115)中进行高效表达。经甲醇诱导96 h,测得重组酶酶活为71.68 U/mL,经纯化获得比活力为2490.1 U/mg。对纯化后的角质酶进行酶学性质分析结果表明,其最适反应pH为9.0,在pH5.0~9.0范围内之间重组角质酶的酶活相对稳定;最适反应温度为35 ℃,在40 ℃条件下保温1 h酶活力保持70%以上。KCl、Triton X-100、MnCl2、SDS对该酶活有促进作用,NaCl、BaCl2、CuSO4、Tween-20、FeSO4、ZnSO4、NiCl2、EDTA、Tween-80对该酶活有抑制作用。

     

    Abstract: A 693 bp gene and encodes 231 mature amino acids for cutinase from Fusarium moniliforme Sheld was cloned and constructed into pPIC9K plasmid.The recombinant cutinase was hyper-produced extracellularly using Pichia pastoris GS115 as the host.After induction in a shake flask for 96 h, the yield of recombinant cutinase reached 71.68 U/mL, and the enzyme purified displayed a specific activity of 2490.1 U/mg.The optimum pH was 9.0, and the activity of the recombinant cutinase was relatively stable within the range of pH5.0~9.0.The optimal temperature of this enzyme was 35℃, and more than 70% of relative activity was retained after incubation for 1 h at 40℃. The recombinant enzyme activity could be stimulated by concentration of KCl, Triton X-100, MnCl2, SDS, but inhibited by NaCl, BaCl2, CuSO4, Tween-20, FeSO4, ZnSO4, NiCl2, EDTA, Tween-80.

     

/

返回文章
返回